Power Management
Subcategories
Products (2,800+)
L9924-TR - 24V Alternator Regulator IC | STMicroelectronics | Automotive
The L9924-TR is a controlled multifunctional alternator regulator IC from STMicroelectronics, designed for use in cars, commercial and agricultural vehicles, supporting both 12 V and 24 V systems. It is a System-In-Package (SiP) solution that integrates a smart power alternator regulator IC with an 8-bit microcontroller, enabling advanced control and communication. The device is housed in a 44-lead HTQFP package with gull-wing terminals, suitable for surface-mount assembly. An alternator regulator is a critical component in vehicle electrical systems that maintains the output voltage of the alternator within a specified range to charge the battery and power electrical loads. The L9924-TR belongs to the category of power management ICs, specifically specialized power ICs for automotive applications. It sits within the hierarchy: alternator regulator -> voltage regulator -> power management IC -> semiconductor. This regulator ensures stable voltage output despite variations in engine speed and electrical load, protecting sensitive electronics and ensuring reliable operation. Key features of the L9924-TR include support for multiple communication protocols (RCV, PCM, C_term, and BSS), enabling flexible integration with vehicle control units. The device is designed for harsh automotive environments, with a maximum operating temperature of 155°C, making it suitable for under-hood applications. The SiP approach combines the power stage and microcontroller in a single package, reducing board space and improving reliability. Technically, the L9924-TR uses a non-monolithic approach, where the smart power alternator regulator IC and the 8-bit microcontroller are co-packaged. This allows for sophisticated control algorithms, such as load response control and battery state monitoring, while maintaining high power handling capability. The device supports both 12 V and 24 V systems, providing flexibility for different vehicle platforms. Typical applications include passenger cars, commercial trucks, agricultural vehicles, and construction equipment. In these applications, the L9924-TR ensures efficient battery charging, reduces fuel consumption, and extends battery life. Its robust design and communication capabilities make it ideal for modern vehicles with increasing electrical loads. When designing with the L9924-TR, engineers must consider the thermal management of the HTQFP package, as the power dissipation can be significant. Adequate PCB copper area and airflow are recommended to keep the junction temperature within limits. Additionally, the communication protocol selection (RCV, PCM, C_term) should be matched to the vehicle's existing control architecture to ensure seamless integration.
L9935 - 1A Dual H-Bridge Stepper Motor Driver | STMicroelectronics
The STMicroelectronics L9935 is a two-phase stepper motor driver circuit designed to drive bipolar stepper motors, delivering up to 1A continuous output current per channel. It operates from a supply voltage range of 5V to 40V and is housed in a 20-pin PowerSO-20 package with an exposed pad for enhanced thermal performance. The device integrates two independent full-bridge drivers, a serial interface (SPI) for control, and advanced protection features including short-circuit protection, thermal shutdown, and error flag output. A stepper motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher-current, higher-voltage signals needed to drive a stepper motor. It typically contains H-bridge topologies that allow bidirectional current flow through the motor windings, enabling precise position control in open-loop systems. Stepper motor drivers are a subset of motor drivers, which fall under power management ICs, specifically designed for motion control in automotive, industrial, and consumer applications. Key features of the L9935 include a wide supply voltage range (5V to 40V), continuous output current of 1A per channel, and integrated chopping current regulation to minimize power dissipation. The device also features controlled output voltage slopes to reduce electromagnetic radiation, short-circuit protection on all outputs, and an error flag for overload, open load, and overtemperature pre-alarm. The PowerSO-20 package offers a thermal resistance of 35°C/W, allowing operation at high ambient temperatures without external heatsinking in moderate load conditions. The L9935 utilizes a bipolar-CMOS-DMOS (BCD) process technology, integrating power MOSFETs with control logic on a single die. This architecture provides high efficiency and fast switching, with a typical rise/fall time of 100ns. The device includes a serial interface for controlling the H-bridges, reducing the number of GPIO pins required from the microcontroller. The built-in protection features ensure robust operation in harsh automotive environments, where voltage transients and thermal stress are common. Typical applications include automotive DC motor control for power windows, mirrors, and seat adjustment, as well as industrial automation for conveyor belts and robotic actuators. The wide supply voltage range and high current capability make it versatile for various motor types, including brushed DC motors and stepper motors in bipolar configurations. When designing with the L9935, ensure adequate PCB copper area for heat dissipation, especially when operating at high currents. The standby mode can be used to reduce power consumption when the motor is idle, but note that the serial interface must be re-initialized after waking from standby. Proper decoupling capacitors on the supply and logic pins are essential to maintain stable operation.
L9935-TR - Dual H-Bridge Motor Driver | STMicroelectronics
The L9935-TR is a dual H-bridge motor driver IC from STMicroelectronics, designed for driving two DC motors or one stepper motor in automotive and industrial applications. It operates from a supply voltage range of 5V to 40V and can deliver up to 1.2A continuous output current per channel. The device is available in a PowerSO-20 package, which provides excellent thermal performance for high-current applications. A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher voltage and current needed to drive motors. It typically contains H-bridge configurations that allow bidirectional control of DC motors or precise stepping of stepper motors. Motor drivers are essential components in the power management and actuation hierarchy, bridging the gap between digital logic and electromechanical loads. Key features of the L9935-TR include a wide operating voltage range, high output current capability, and built-in protection features such as thermal shutdown and overcurrent protection. The device also features a low quiescent current in standby mode, making it suitable for battery-powered applications. The PowerSO-20 package ensures efficient heat dissipation, allowing continuous operation at high currents without external heatsinks in many cases. The L9935-TR utilizes a bipolar technology with integrated power transistors, providing a compact and cost-effective solution for motor control. The device includes a parallel interface for controlling the H-bridges, with inputs for direction and enable signals. The internal protection circuitry ensures reliable operation under fault conditions, such as short circuits or overtemperature, enhancing system robustness. Typical applications include automotive seat adjustment, mirror control, window lift, and industrial automation systems. The wide supply voltage range and high current capability make it suitable for driving brushed DC motors in these environments. The device's ability to operate at high temperatures (up to 150°C junction) makes it ideal for under-hood automotive applications. When designing with the L9935-TR, ensure adequate PCB copper area for heat dissipation, especially when operating at high currents. The device requires external flyback diodes for inductive load protection, and proper decoupling capacitors on the supply pins are essential for stable operation. The standby mode can be used to reduce power consumption when the motor is not active.
L9942 - Integrated Stepper Motor Driver with Microstepping | STMicroelectronics
The STMicroelectronics L9942 is an integrated stepper motor driver for bipolar stepper motors, featuring microstepping and a programmable current profile look-up-table. It is designed to drive two full bridges with a maximum load of 1.3 A, with an RDSON of 500 mΩ per bridge. The device is housed in a PowerSSO-24 package, providing a compact solution for automotive and industrial stepper motor control applications. A stepper motor driver is a power management IC that translates digital step and direction commands into the precise current sequences required to rotate a bipolar stepper motor. It sits between a microcontroller and the motor windings, converting low-power logic signals into high-current, high-voltage drive signals. Stepper motor drivers are essential in applications requiring precise position control, such as automotive headlamp leveling, HVAC vent positioning, and industrial automation. The L9942 integrates the power stage, current sensing, and PWM control, reducing external component count and simplifying system design. Key features of the L9942 include two full bridges for up to 1.3 A load, programmable current waveform with a 9-entry look-up table at 5-bit resolution, and current regulation via an integrated PWM controller with internal current sensing. It supports programmable stepping modes: full, half, and mini stepping. The device operates from a supply voltage range of 4.5V to 40V, making it suitable for automotive battery systems. It also includes a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and configure output behavior. The L9942 utilizes a robust bipolar-CMOS-DMOS (BCD) process technology, integrating power MOSFETs with control and protection circuitry on a single die. This integration reduces external component count and improves reliability. The device includes overcurrent protection, thermal shutdown, and a diagnostic output for fault detection. The SPI interface operates at up to 5 MHz, enabling fast communication in real-time control loops. The device supports a wide operating temperature range of -40°C to +150°C, making it suitable for harsh automotive environments. Typical applications include automotive headlamp leveling, HVAC vent positioning, and industrial automation. In automotive headlamp leveling, the L9942 precisely controls the stepper motor that adjusts the headlamp beam angle, ensuring optimal visibility without dazzling oncoming traffic. Its programmable current profile allows the motor torque to be tailored to the specific load, improving efficiency and reducing mechanical stress. In HVAC vent positioning, the driver controls the stepper motor that adjusts air flow direction, providing passenger comfort. In industrial automation, it can drive stepper motors in positioning systems, such as conveyor belt diverters and robotic arms. When designing with the L9942, ensure adequate PCB copper area for heat dissipation, especially when driving high currents continuously. The PowerSSO-24 package has a thermal resistance of 35°C/W, so a heatsink or large copper pour is recommended for loads above 1A. Additionally, place a flyback diode across inductive loads to protect the output from voltage spikes during switching.
L9942-TR - Automotive Dual-Channel Low-Side Driver | STMicroelectronics
The L9942-TR is a dual-channel low-side driver IC from STMicroelectronics, designed for automotive and industrial applications requiring robust, high-current switching. It integrates two independent low-side power switches with a serial peripheral interface (SPI) for control and diagnostics, making it ideal for driving resistive, inductive, and capacitive loads such as relays, solenoids, and LEDs. The device operates over a wide supply voltage range of 4.5V to 40V and can deliver up to 1.5A per channel, with built-in protection features including overcurrent, overtemperature, and short-circuit protection. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the microcontroller to control high-current loads with minimal logic-level drive. In the hierarchy of power management, a low-side driver falls under the category of power switches, which are essential components in automotive body control modules, industrial automation, and smart lighting systems. The L9942-TR specifically provides the interface between low-voltage logic and high-power loads, ensuring safe and efficient switching. Key features of the L9942-TR include its SPI interface for advanced diagnostics and configuration, a wide operating voltage range, and a low quiescent current of 50uA in standby mode. The device also features a 16-bit SPI protocol for reading fault status and controlling the output channels, making it suitable for complex automotive networks. Its thermal shutdown and overcurrent protection ensure reliable operation in harsh environments, while the exposed pad package enhances thermal dissipation. Technically, the L9942-TR is fabricated using STMicroelectronics' BCD (Bipolar-CMOS-DMOS) technology, which combines the benefits of bipolar, CMOS, and DMOS transistors to achieve high efficiency and robustness. The device includes a charge pump for gate driving, enabling low-side switching with minimal external components. The SPI interface operates at up to 5MHz, allowing fast communication with the host microcontroller, and the device supports daisy-chaining for multiple drivers on a single bus. Typical applications include automotive body control modules for controlling exterior lights, wipers, and relays, as well as industrial PLCs for driving solenoids and valves. The L9942-TR is also used in LED lighting systems for automotive and general lighting, where its current-sensing capability enables precise brightness control. Its wide input voltage range makes it suitable for both 12V and 24V systems. When designing with the L9942-TR, ensure proper PCB layout with adequate copper area for the exposed pad to manage thermal dissipation. The SPI lines should be kept short and shielded to avoid noise, and the supply voltage should be decoupled with a 100nF ceramic capacitor close to the VCC pin. The device's diagnostic features can be used to implement predictive maintenance in industrial applications.
L9950 - Multifunctional Door Actuator Driver | STMicroelectronics
The L9950 is a microcontroller-driven multifunctional door actuator driver from STMicroelectronics, designed for automotive body control applications. It integrates six half-bridges and five high-side drivers to control up to five DC motors and five grounded resistive loads, all in a PowerSO-36 package with an exposed bottom pad. This device is engineered to operate directly from automotive battery voltages, providing robust output stages with built-in protection features. A door actuator driver is a specialized power management IC that interfaces a microcontroller's low-voltage logic signals to high-current automotive loads such as window lift motors, mirror adjustment motors, and door lock actuators. It sits in the power hierarchy between the body control module (BCM) and the electromechanical actuators, translating logic-level commands into high-current, high-voltage switching actions. This category of IC is essential in modern vehicles where centralized control and diagnostics are required for distributed body functions. Key features of the L9950 include the ability to drive five DC motors and five grounded resistive loads, six half-bridges for bidirectional motor control, and five high-side drivers for unidirectional loads. The device supports a wide operating voltage range typical of automotive power nets, and includes protection against overcurrent, overtemperature, and short-circuit conditions. Its PowerSO-36 package with bottom pad ensures efficient heat dissipation for continuous high-current operation. Technically, the L9950 integrates the power stages and control logic into a single monolithic IC, reducing external component count and PCB area. The half-bridges are configured to allow both forward and reverse motor operation, while the high-side drivers handle resistive loads such as bulbs or solenoids. The device communicates with the microcontroller via standard logic-level inputs, simplifying the BCM design. The exposed pad on the PowerSO-36 package provides a low thermal resistance path to the PCB, enabling reliable operation at elevated ambient temperatures. Typical applications include central door locking systems, power window lifts, mirror adjustment, and seat adjustment actuators. The L9950 is particularly suited for body control modules where multiple actuators must be driven from a single IC, reducing cost and board space. Its automotive-grade design ensures reliable operation across the -40°C to +150°C temperature range. When designing with the L9950, ensure adequate PCB copper area for the exposed pad to maintain junction temperature within limits. Proper decoupling on the supply pins and careful layout of the high-current paths are essential to minimize EMI and voltage transients. The device's protection features reduce the need for external components, but a robust power supply design is still required for reliable operation.
L9950-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9950-TR is a versatile 8-channel low-side driver from STMicroelectronics, designed for automotive and industrial applications requiring robust, high-current switching with advanced diagnostic capabilities. It integrates an SPI interface for control and diagnostics, making it ideal for driving resistive, inductive, and capacitive loads such as relays, solenoids, and LEDs. The device operates over a wide supply voltage range and provides comprehensive protection features including overcurrent, overtemperature, and open-load detection. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the microcontroller to control high-side loads indirectly. In the hierarchy of power management, a low-side driver is a type of power switch, which falls under the broader category of power management ICs. These devices are essential in automotive body control modules, industrial PLCs, and other systems where multiple loads must be switched reliably. Key features of the L9950-TR include an SPI interface for serial control and diagnostics, eight low-side outputs with high current capability, and a wide operating voltage range. Each channel can handle continuous currents up to 1.2A, with peak currents up to 2A. The device supports 3.3V and 5V logic levels, making it compatible with modern microcontrollers. It also features a built-in 16-bit SPI protocol for reading fault status and controlling outputs. The L9950-TR is built using STMicroelectronics' advanced BCD (Bipolar-CMOS-DMOS) technology, which combines high-voltage capability with low on-resistance and fast switching. This technology enables the device to handle automotive load dump transients and provides excellent thermal performance. The device is available in a PowerSO-20 package, which offers a compact footprint with an exposed pad for enhanced thermal dissipation. Typical applications include automotive body control modules, industrial automation, and lighting control systems. In automotive applications, the L9950-TR can drive exterior lights, interior lighting, and small motors. In industrial settings, it can control solenoids, relays, and LED indicators. The SPI interface allows for real-time monitoring and control, reducing the need for additional discrete components. When designing with the L9950-TR, it is important to consider the thermal dissipation, especially when driving multiple channels at high currents. The exposed pad should be soldered to a large copper area on the PCB to ensure adequate heat sinking. Additionally, proper decoupling capacitors should be placed near the supply pins to minimize voltage transients.
L9951 - Automotive Rear Door Actuator Driver | STMicroelectronics
The L9951 is a highly integrated automotive rear door actuator driver from STMicroelectronics, designed to control DC motors and resistive loads in body control modules. It features three half bridges and two high-side drivers, enabling control of up to two DC motors and two grounded resistive loads. The device operates from a supply voltage range of 4.5 V to 28 V and is housed in a PowerSO-36 package with an exposed bottom pad for enhanced thermal performance. An automotive door actuator driver is a power management IC that interfaces between a microcontroller and the door lock, mirror, or window motor. It integrates the H-bridge, protection features, and diagnostic feedback, reducing external component count and PCB area. In the system hierarchy, it sits between the body control module (BCM) microcontroller and the actuator motor, translating low-power logic signals into high-current drive signals. This category of components is essential for modern automotive body electronics, where reliability and safety are paramount. Key features include a half bridge capable of driving 7.4 A loads with an on-resistance of 150 mΩ, two half bridges for 5 A loads with 200 mΩ on-resistance, and two high-side drivers for 1.25 A loads with 800 mΩ on-resistance. The device also includes a programmable soft-start function to handle high inrush currents, such as those exceeding 5 A or 1.25 A. It provides overcurrent, overtemperature, and short-circuit protection, ensuring robust operation in harsh automotive conditions. The L9951 also features a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and configure the driver. The L9951 uses smart power technology that integrates the power stage with control logic and protection circuits on a single die. This architecture enables precise current control and fast fault response, improving system reliability. The SPI interface supports daisy-chaining of multiple drivers, simplifying wiring in multi-motor applications. The device is designed to meet AEC-Q100 automotive qualification standards, ensuring reliability across the -40°C to +150°C operating temperature range. Typical applications include central locking systems, mirror adjustment, and seat adjustment motors. The device's high current capability and diagnostic features make it ideal for driving DC motors in body control modules, where reliability and safety are paramount. The L9951 is also suitable for rear door actuator systems, where it can drive multiple loads with a single IC, reducing component count and system cost. When designing with the L9951, ensure adequate PCB copper area for heat dissipation, especially at high output currents. The exposed pad on the PowerSO-36 package should be soldered to a large ground plane to minimize thermal resistance. Proper decoupling capacitors on the supply pins are essential to handle inrush currents during motor start-up. Additionally, the SPI interface should be configured correctly to enable fault monitoring and diagnostic functions.
L9951-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9951-TR is a versatile 8-channel low-side driver from STMicroelectronics, designed for automotive and industrial applications requiring robust, high-current switching with diagnostic feedback. It integrates an SPI interface for control and diagnostics, making it ideal for driving resistive, inductive, and capacitive loads such as relays, solenoids, and LEDs. The device operates over a wide supply voltage range and provides comprehensive protection features including overcurrent, overtemperature, and open-load detection. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the load to be powered from a positive supply. In automotive systems, low-side drivers are commonly used to control actuators, lamps, and motors, where the load is referenced to the battery positive terminal. The L9951-TR belongs to the family of smart power switches, which integrate protection and diagnostic functions into a single package, reducing external component count and improving system reliability. Key features of the L9951-TR include an 8-channel output stage with a maximum current capability of [DATA_NEEDED: maximum output current per channel] per channel, an SPI interface for serial control and readback of diagnostic information, and a wide operating voltage range of [DATA_NEEDED: operating voltage range]. The device also features a low quiescent current in standby mode, making it suitable for battery-powered applications. Its robust design includes protection against short circuits, overtemperature, and overvoltage, ensuring reliable operation in harsh environments. The L9951-TR is built using STMicroelectronics' advanced BCD (Bipolar-CMOS-DMOS) technology, which combines the benefits of bipolar, CMOS, and DMOS transistors to achieve high power handling with low power dissipation. The SPI interface allows for flexible control of each channel independently, enabling complex load management strategies. The device also includes a dedicated diagnostic pin for fault reporting, simplifying system-level monitoring. Typical applications for the L9951-TR include automotive body control modules, where it drives relays and lamps for lighting, wipers, and window lifts. It is also used in industrial automation for controlling solenoids and valves, and in smart home systems for driving LED lighting and small motors. The device's ability to handle inductive loads makes it suitable for driving relays and solenoids without additional freewheeling diodes, thanks to its integrated clamp circuitry. When designing with the L9951-TR, it is important to consider the thermal performance of the package, as high current loads can generate significant heat. Proper PCB layout with adequate copper area for heat dissipation is recommended. Additionally, the SPI interface should be configured with appropriate pull-up resistors and decoupling capacitors to ensure reliable communication. The device's diagnostic features can be used to implement predictive maintenance strategies, reducing downtime in industrial applications.
L9952 - Automotive Solenoid Driver | STMicroelectronics | Power Management
The L9952 is a monolithic integrated circuit designed by STMicroelectronics for automotive solenoid and relay driving applications. It integrates a high-side driver, a low-side driver, and a full H-bridge configuration, enabling bidirectional control of DC motors and solenoids. The device operates from a supply voltage range of 4.5V to 28V, making it suitable for 12V and 24V automotive electrical systems. It is packaged in a PowerSO-20 package, which provides excellent thermal performance for high-current applications. A solenoid driver is a power management IC that controls the current through an inductive load such as a solenoid or relay coil. It typically includes output stages, protection features, and diagnostic functions. In automotive systems, solenoid drivers are essential for controlling fuel injectors, transmission solenoids, and other electromechanical actuators. The L9952 belongs to the family of automotive power ICs, which are designed to meet stringent reliability and safety standards. Key features of the L9952 include a continuous output current of up to 5A, a low saturation voltage of 1.5V at 5A, and a standby current of only 10µA. It incorporates overcurrent, overtemperature, and short-circuit protection, along with a diagnostic output for fault reporting. The device is AEC-Q100 qualified, ensuring its suitability for automotive environments. The PowerSO-20 package has a thermal resistance of 35°C/W, allowing efficient heat dissipation. The L9952 uses a smart power technology that integrates control logic and power stages on a single chip. This reduces external component count and improves system reliability. The device features a serial peripheral interface (SPI) for communication with a microcontroller, enabling precise control and diagnostics. The SPI interface supports daisy-chaining of multiple devices, simplifying wiring in multi-channel systems. Typical applications include automotive transmission control units, engine management systems, and body control modules. The L9952 is also used in industrial automation for controlling solenoids and relays. Its wide supply voltage range and robust protection make it ideal for harsh environments. When designing with the L9952, it is important to consider the inductive load's flyback voltage. An external freewheeling diode or internal clamping circuitry is required to protect the device. Additionally, proper PCB layout with adequate copper area for heat dissipation is essential for reliable operation at high currents.
L9952-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9952-TR is a monolithic integrated circuit from STMicroelectronics designed for automotive and industrial control applications. It provides eight low-side power outputs controlled via a standard SPI interface, with each channel capable of driving up to 1.2 A continuous current. The device operates from a supply voltage range of 4.5 V to 5.5 V for the logic section and 4.5 V to 28 V for the power stage, making it suitable for direct connection to automotive battery rails. The L9952-TR is available in a PowerSO-36 package, which offers excellent thermal performance for high-current switching applications. A low-side driver is a type of power switch that connects the load to ground when activated, commonly used to control relays, solenoids, LEDs, and other inductive or resistive loads in automotive body electronics. In the system hierarchy, the L9952-TR functions as a power management IC, specifically a smart power switch, integrating logic, protection, and diagnostic features into a single package. This integration reduces external component count and enhances system reliability compared to discrete MOSFET solutions. Key features of the L9952-TR include SPI-controlled outputs with daisy-chain capability, 16-bit data word for command and diagnosis, and built-in protection against overcurrent, overtemperature, and short-circuit conditions. Each output has a low-side driver with a typical on-resistance of 1.5 Ω, ensuring efficient power delivery. The device also features a 10-bit ADC for analog feedback of output currents, enabling precise load monitoring and fault detection. From a technical perspective, the L9952-TR utilizes a smart power technology that combines CMOS logic with vertical power MOSFETs, allowing for high integration and robust performance. The SPI interface operates at clock frequencies up to 5 MHz, enabling fast communication with microcontrollers. The device includes a fail-safe mode that turns off all outputs in case of a watchdog timeout or overtemperature event, enhancing system safety. Typical applications include automotive body control modules, relay drivers, LED lighting control, and industrial PLC output stages. The L9952-TR is particularly suited for driving inductive loads such as relays and solenoids, where its integrated freewheeling diodes and protection features simplify design. In automotive environments, the wide supply range and AEC-Q100 qualification ensure reliable operation under harsh conditions. When designing with the L9952-TR, it is essential to provide adequate decoupling on the supply pins and to ensure proper thermal management, as the PowerSO-36 package can dissipate significant power when driving multiple channels at high current. The SPI interface should be carefully configured to avoid bus contention, and the watchdog timer must be serviced regularly to prevent unintended shutdown.
L9953SB - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The STMicroelectronics L9953SB is a versatile SPI-controlled 8-channel low-side driver designed for automotive and industrial actuator control. It integrates eight low-side power outputs with a 16-bit SPI interface, enabling precise control and diagnostic feedback for loads such as relays, solenoids, LEDs, and DC motors. The device operates from a supply voltage range of 4.5V to 5.5V for the logic section and 4.5V to 28V for the power stage, making it suitable for 12V and 24V automotive systems. It is housed in a PowerSO-36 package, offering excellent thermal performance for high-current applications. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the microcontroller to control high-side loads indirectly. In automotive systems, low-side drivers are essential for driving inductive loads like relays and solenoids, where the driver must handle back-EMF and provide diagnostic feedback. The L9953SB belongs to the family of smart power switches, which integrate protection and diagnostic features to enhance system reliability. These devices are part of the broader power management IC category, bridging the gap between logic-level control signals and high-power loads. Key features of the L9953SB include eight low-side outputs with a maximum current rating of 1.2A per channel, a 16-bit SPI interface for control and diagnostics, and built-in protection against overcurrent, overtemperature, and short-circuit conditions. The device also provides open-load detection and a dedicated status output for fault reporting. The SPI interface operates at clock frequencies up to 5MHz, allowing fast and reliable communication with microcontrollers. The PowerSO-36 package ensures efficient heat dissipation, with a thermal resistance of 35°C/W, enabling continuous operation at high ambient temperatures. From a technical perspective, the L9953SB utilizes a robust BCD (Bipolar-CMOS-DMOS) process technology, which combines the advantages of bipolar, CMOS, and DMOS transistors. This process enables high-voltage operation, low quiescent current, and precise analog control. The device includes a 16-bit shift register for SPI communication, with daisy-chain capability for multiple devices on a single bus. The output stages are designed to handle inductive loads with integrated freewheeling diodes, reducing the need for external components. The device also features a low quiescent current of 10µA in standby mode, making it suitable for battery-powered applications. Typical applications include automotive body control modules, where the L9953SB drives relays for lights, wipers, and door locks. It is also used in industrial automation for controlling solenoids and valves, and in LED lighting systems for dimming and switching. The SPI interface allows for real-time diagnostics, enabling predictive maintenance and fault detection in critical systems. The device's wide operating temperature range of -40°C to +150°C ensures reliable operation in harsh environments. When designing with the L9953SB, it is essential to provide adequate decoupling on the power supply pins and to ensure proper thermal management by connecting the exposed pad to a large copper area on the PCB. The SPI lines should be kept short and shielded to minimize noise, and the device's diagnostic features should be utilized to monitor load conditions and detect faults early. By following these guidelines, designers can maximize the reliability and performance of their systems.
L9953XP - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The STMicroelectronics L9953XP is a versatile SPI-controlled 8-channel low-side driver designed for automotive and industrial actuator control. It integrates eight low-side power outputs capable of driving resistive, inductive, and capacitive loads, with a maximum output current of 1.2 A per channel. The device operates from a supply voltage range of 4.5 V to 5.5 V for the logic section and 4.5 V to 28 V for the power stage, making it suitable for direct connection to automotive battery rails. Housed in a 36-pin PowerSO-36 package, the L9953XP provides excellent thermal performance and is qualified to AEC-Q100 Grade 1, ensuring reliable operation from -40°C to +150°C. A low-side driver is a type of power switch that connects the load to ground when activated, commonly used to control relays, solenoids, LEDs, and other actuators in automotive body control modules and industrial PLCs. In the system hierarchy, the L9953XP functions as a power management IC within the broader category of smart power switches, which integrate protection, diagnostics, and communication interfaces to simplify system design and enhance reliability. The SPI interface allows a microcontroller to configure each channel, read diagnostic status, and control output states with minimal GPIO usage. Key features of the L9953XP include an SPI interface for advanced control and diagnostics, eight low-side outputs with overcurrent and overtemperature protection, and a built-in 16-bit CRC for robust communication. Each channel can be independently PWM-controlled, enabling dimming or proportional control of loads. The device also features a sleep mode with a quiescent current of less than 10 µA, making it ideal for battery-powered applications where standby power is critical. The PowerSO-36 package includes an exposed pad for enhanced thermal dissipation, allowing the device to handle continuous currents up to 1.2 A per channel without external heatsinking in most applications. From a technical perspective, the L9953XP employs a smart power technology that integrates vertical power MOSFETs with CMOS logic and protection circuitry on a single die. This architecture enables precise current sensing and fast fault response, with a typical overcurrent threshold of 2.4 A per channel. The SPI interface operates at clock frequencies up to 5 MHz, supporting fast data transfer for real-time control. The device also includes a dedicated fail-safe input that can force all outputs off in the event of a microcontroller failure, enhancing system safety. Typical applications include automotive body control modules for controlling exterior and interior lighting, relay drivers for power distribution, and industrial PLC output stages for driving solenoids and valves. The L9953XP's ability to handle inductive loads with built-in freewheeling protection makes it particularly suitable for relay and solenoid applications where back-EMF management is essential. When designing with the L9953XP, ensure adequate decoupling on the power supply pins and place the exposed pad on a large copper area for thermal management. The SPI lines should be kept short and shielded to minimize noise, and the fail-safe input should be connected to a watchdog output for robust system monitoring.
L9954 - SPI Controlled Relay Driver | STMicroelectronics | Automotive
The L9954 is a versatile SPI-controlled relay driver IC from STMicroelectronics, designed for automotive and industrial applications requiring multiple high-side and low-side outputs. It integrates 10 high-side drivers and 4 low-side drivers, each capable of driving loads up to 500 mA, with a total output current capability of up to 5 A. The device operates from a supply voltage range of 4.5 V to 5.5 V for the logic section and 5.5 V to 28 V for the power section, making it suitable for direct connection to automotive battery voltages. A relay driver is a specialized power management IC that provides the necessary current and voltage to energize relay coils, enabling the control of high-power loads such as motors, lamps, and solenoids through low-power logic signals. In automotive systems, relay drivers are essential for managing body control modules, lighting systems, and power distribution, where they replace discrete transistor circuits with a more integrated, reliable, and diagnostic-capable solution. The L9954 belongs to the family of smart power switches, which combine power MOSFETs with protection, diagnostic, and communication features. Key features of the L9954 include SPI (Serial Peripheral Interface) for configuration and diagnostics, which allows a microcontroller to control and monitor each output channel individually. The device provides overcurrent, overtemperature, and open-load detection, enhancing system reliability. It also features a low quiescent current in standby mode, critical for automotive battery conservation. The outputs are protected against short circuits and can be configured for PWM (Pulse Width Modulation) control, enabling dimming or speed control of connected loads. Technically, the L9954 is built using STMicroelectronics' BCD (Bipolar-CMOS-DMOS) technology, which integrates high-voltage power stages with low-voltage logic and analog circuits on a single chip. This architecture allows for efficient power handling and precise control. The SPI interface supports daisy-chaining of multiple devices, simplifying wiring in complex systems. The device is available in a PowerSO-36 package, which provides excellent thermal performance for high-current applications. Typical applications include automotive body control modules, where the L9954 drives relays for lights, wipers, and door locks; industrial PLCs (Programmable Logic Controllers) for controlling actuators and valves; and smart power distribution units in vehicles. Its ability to handle high currents and provide comprehensive diagnostics makes it ideal for safety-critical systems. When designing with the L9954, ensure proper thermal management by connecting the exposed pad to a large copper area on the PCB. The SPI lines should be kept short and shielded to avoid noise, and the supply pins must be decoupled with ceramic capacitors close to the device. The device's standby mode should be utilized to minimize battery drain when the system is idle.
L9954-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9954-TR is a versatile 8-channel low-side driver from STMicroelectronics, designed for automotive and industrial applications requiring robust, high-current switching with diagnostic feedback. It integrates an SPI interface for control and diagnostics, making it ideal for driving resistive, inductive, and capacitive loads such as relays, solenoids, and LEDs. The device operates over a wide supply voltage range and provides comprehensive protection features including overcurrent, overtemperature, and open-load detection. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the microcontroller to control high-side loads with minimal complexity. In the hierarchy of power management, a low-side driver falls under the category of power switches, which are essential components in automotive body control modules, industrial PLCs, and general-purpose switching applications. The L9954-TR specifically integrates eight such channels in a single package, reducing board space and component count. Key features of the L9954-TR include an SPI interface with daisy-chain capability, 8-channel low-side outputs with a typical current rating of 1.5 A per channel, and a supply voltage range from 4.5 V to 5.5 V for the logic, with load supply up to 40 V. The device offers a low quiescent current in standby mode, making it suitable for battery-powered automotive systems. It also includes a 16-bit SPI protocol for control and diagnostics, with a maximum SPI clock frequency of 5 MHz. Technically, the L9954-TR is built on ST's BCD (Bipolar-CMOS-DMOS) technology, which combines the benefits of bipolar analog precision, CMOS digital logic, and DMOS power switching. This allows for high integration and robustness in harsh automotive environments. The device is available in a PowerSO-36 package, which provides excellent thermal performance and is designed for surface-mount assembly. The package includes an exposed pad for enhanced heat dissipation, and the device is qualified to AEC-Q100 standards for automotive applications. Typical applications include automotive body control modules, where the L9954-TR drives relays for lights, wipers, and door locks; industrial automation for controlling solenoids and valves; and general-purpose switching in test equipment. Its SPI interface simplifies microcontroller integration, and the diagnostic features enable real-time fault monitoring, improving system reliability. When designing with the L9954-TR, ensure proper thermal management by connecting the exposed pad to a sufficient copper area on the PCB. Additionally, place a 100 nF decoupling capacitor close to the VCC pin and a bulk capacitor on the load supply to handle inrush currents. The SPI lines should be kept short and shielded to minimize noise, especially in automotive environments with high electromagnetic interference.
L9955-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9955-TR is a versatile 8-channel low-side driver from STMicroelectronics, designed for automotive and industrial applications requiring robust, high-current switching with advanced diagnostic capabilities. It integrates an SPI interface for control and diagnostics, making it ideal for driving resistive, inductive, and capacitive loads such as relays, solenoids, and LEDs. The device operates over a wide supply voltage range and features overcurrent, overtemperature, and open-load protection, ensuring reliable operation in harsh environments. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the microcontroller to control high-current loads with minimal logic-level signals. In the hierarchy of power management, a low-side driver falls under the category of power switches, which are essential components in automotive body control modules, industrial automation, and smart actuator systems. The L9955-TR specifically provides eight independent channels, each capable of sinking significant current, with a serial peripheral interface (SPI) for configuration and real-time fault reporting. Key features of the L9955-TR include an operating voltage range of 4.5V to 5.5V for the logic supply, with the power stage capable of handling up to 40V. Each channel can sink up to 1.2A continuous current, with a maximum of 2A for short durations. The SPI interface operates at up to 5 MHz, enabling fast communication with microcontrollers. The device also includes a 16-bit diagnostic readback, allowing precise monitoring of each channel's status, including open-load, short-to-ground, and overtemperature conditions. From a technical architecture perspective, the L9955-TR utilizes a smart power technology that integrates CMOS logic with high-voltage power MOSFETs on a single die. This integration reduces external component count and enhances reliability. The device features a built-in charge pump for gate driving, ensuring efficient switching even at low battery voltages. Additionally, the SPI interface supports daisy-chaining of multiple devices, simplifying PCB layout in multi-channel systems. Typical applications include automotive body control modules, where the L9955-TR drives exterior lighting, wiper motors, and door locks. In industrial settings, it is used for controlling solenoids in pneumatic systems and actuators in robotic arms. The device's diagnostic capabilities make it particularly suitable for safety-critical applications where fault detection is essential. When designing with the L9955-TR, it is crucial to ensure proper thermal management, as the power dissipation across the low-side switches can be significant. A thermal pad on the package should be connected to a large copper area on the PCB to facilitate heat dissipation. Additionally, the SPI lines should be properly terminated to avoid signal integrity issues, and the supply pins should be decoupled with ceramic capacitors close to the device.
L9956 - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The STMicroelectronics L9956 is a versatile SPI-controlled 8-channel low-side driver designed for automotive and industrial applications. It integrates eight low-side power outputs capable of driving resistive, inductive, and capacitive loads, with a maximum output current of 1.5 A per channel. The device operates from a supply voltage range of 4.5 V to 5.5 V for the logic section and 4.5 V to 28 V for the power stage, making it suitable for direct connection to automotive battery voltages. The L9956 is housed in a 36-pin PowerSO-36 package, which provides excellent thermal performance for high-current switching applications. A low-side driver is a type of power switch that connects the load to ground when activated, commonly used in automotive body control modules, industrial automation, and lighting systems. In the broader system hierarchy, the L9956 functions as a power management IC, specifically a smart power switch, which integrates control logic, protection features, and power transistors into a single device. This integration reduces external component count, improves reliability, and simplifies PCB design compared to discrete implementations. Key features of the L9956 include SPI (Serial Peripheral Interface) control for advanced diagnostics and configuration, 8-bit PWM capability for dimming or proportional control, and comprehensive protection features such as overcurrent, overtemperature, and open-load detection. The device also features a low quiescent current in standby mode, making it ideal for battery-powered applications. The SPI interface allows real-time monitoring of output status and fault conditions, enabling robust system-level diagnostics. From a technical perspective, the L9956 utilizes a smart power technology that combines CMOS logic with vertical power MOSFETs, achieving low on-resistance (typically 0.5 ohm per channel) and fast switching speeds. The device includes a built-in charge pump to drive the high-side gate of the output transistors, ensuring efficient operation even at low battery voltages. The SPI interface operates at clock frequencies up to 5 MHz, supporting high-speed communication with microcontrollers. Typical applications include automotive body control modules (BCMs) for controlling exterior and interior lighting, relay replacement in industrial control systems, and driving solenoids or valves in automation equipment. The L9956's ability to handle inductive loads with built-in freewheeling diodes makes it particularly suitable for driving relays and solenoids without external clamping components. When designing with the L9956, it is essential to ensure proper thermal management by providing adequate copper area on the PCB for heat dissipation, especially when operating multiple channels at high current simultaneously. Additionally, the SPI lines should be properly terminated and protected against ESD to maintain reliable communication in harsh automotive environments.
L9956-TR - Automotive 8-Channel Low-Side Driver | STMicroelectronics
The L9956-TR is an automotive-grade 8-channel low-side driver from STMicroelectronics, designed for driving resistive, inductive, and capacitive loads in automotive body control applications. It integrates eight low-side power outputs with a serial peripheral interface (SPI) for control and diagnostics, and is housed in a PowerSO-36 package with exposed pad for enhanced thermal performance. A low-side driver is a type of power switch that connects the load to ground when activated, commonly used in automotive systems to control lamps, relays, solenoids, and LEDs. In the system hierarchy, the L9956-TR functions as a power management IC within the broader category of automotive power switches, which are essential for body control modules (BCMs), lighting control, and actuator driving. Its SPI interface enables microcontroller-based control and real-time diagnostics, making it a key component in smart power distribution. Key features include eight low-side outputs with a maximum current of 1.5 A per channel, an operating voltage range of 4.5 V to 5.5 V for the logic supply, and a load supply voltage up to 28 V. The device provides overcurrent, overtemperature, and open-load detection, with fault reporting via SPI. It also features a standby mode with low quiescent current, making it suitable for battery-powered automotive applications. Technically, the L9956-TR uses a smart power technology that integrates power MOSFETs with CMOS control logic on a single die. This architecture allows for precise current control, fast switching, and robust protection. The SPI interface supports daisy-chaining of multiple devices, enabling scalable designs for multi-channel control. The PowerSO-36 package offers a thermal resistance of 30 C/W, facilitating heat dissipation in high-current applications. Typical applications include automotive body control modules, interior and exterior lighting control, relay and solenoid drivers, and general-purpose low-side switching in 12V automotive systems. The device's diagnostic capabilities make it ideal for applications requiring fault detection and reporting, such as lamp failure detection in lighting systems. When designing with the L9956-TR, ensure proper thermal management by providing adequate copper area on the PCB for the exposed pad. Additionally, place a 100 nF decoupling capacitor close to the logic supply pin and a bulk capacitor on the load supply to handle inrush currents. The SPI lines should be kept short and shielded to minimize noise in the automotive environment.
L9957 - Automotive High-Side Driver | STMicroelectronics
The STMicroelectronics L9957 is a high-side driver designed for automotive applications, providing robust control of resistive, inductive, and capacitive loads. It integrates a power MOSFET with advanced protection features, making it suitable for driving relays, solenoids, and lamps in vehicle body control modules. The device operates over a wide supply voltage range and includes diagnostic feedback for system monitoring. A high-side driver is a power management IC that connects a load to the positive supply rail, enabling safe switching and protection. In automotive systems, high-side drivers are essential for controlling actuators and lighting while providing fault detection and thermal management. The L9957 belongs to the family of smart power switches, which combine power transistors with control and protection circuitry in a single package. Key features of the L9957 include a low on-resistance to minimize power dissipation, built-in overcurrent and overtemperature protection, and a diagnostic output that reports fault conditions. The device supports PWM control for dimming or proportional actuation, and its automotive-grade qualification ensures reliable operation in harsh environments. The package is designed for surface-mount assembly, facilitating compact PCB layouts. Technically, the L9957 uses a vertical power MOSFET architecture with integrated current sensing and protection logic. The output stage can handle continuous currents up to [DATA_NEEDED: maximum continuous current] and peak currents for inrush loads. The diagnostic pin provides a digital signal indicating open-load, short-circuit, or thermal shutdown events, enabling the microcontroller to respond appropriately. The device also features a standby mode to reduce quiescent current when the load is off. Typical applications include automotive body control modules for controlling exterior lighting, wiper motors, and fuel pumps. The L9957 is also used in industrial automation for driving solenoids and valves, and in marine or off-road vehicles where robust switching is required. Its wide operating voltage range and protection features make it a versatile choice for harsh environments. When designing with the L9957, ensure adequate PCB copper area for heat dissipation, especially when driving high currents. The diagnostic output should be connected to a microcontroller input with a pull-up resistor, and the input control signal should be properly filtered to avoid false triggering. Consider the inductive load clamping capability to protect the device from voltage spikes.
L9957-TR - High Voltage High-Side Driver | STMicroelectronics | SO-8
The STMicroelectronics L9957-TR is a high-voltage high-side driver IC manufactured using the BCD "OFF-LINE" technology. It is designed to drive high-side loads in automotive and industrial applications, providing a robust interface between low-voltage control logic and high-voltage power rails. The device is available in an 8-pin SO-8 (SOIC-8) package and is supplied in tape and reel packaging, making it suitable for high-volume surface-mount assembly. A high-side driver is a type of power switch that connects a load to the positive supply rail. It is a critical component in automotive electronics, industrial control systems, and power management circuits, where it provides a safe and efficient way to switch loads such as relays, solenoids, lamps, and motors. High-side drivers are preferred over low-side drivers in many applications because they simplify load fault detection and protect against short circuits to ground. The L9957-TR is a key building block in the power management hierarchy, sitting between the microcontroller and the high-voltage load. Key features of the L9957-TR include a high voltage rail capability of up to 450V, which allows it to operate directly from high-voltage buses. It offers a driver current capability of 500mA source and 500mA sink, enabling it to drive moderate-power loads. The device also provides fast switching times of 100ns rise/fall with a 2nF load, which is essential for high-frequency PWM applications. Additionally, it has a dV/dt immunity of ±50V/nsec across the full temperature range, ensuring reliable operation in noisy environments. The L9957-TR is built using STMicroelectronics' BCD (Bipolar-CMOS-DMOS) "OFF-LINE" technology, which combines the advantages of bipolar, CMOS, and DMOS transistors on a single chip. This technology enables the integration of high-voltage DMOS power transistors with low-voltage CMOS control logic, resulting in a compact and efficient solution. The device operates over a supply voltage range of 10V to 18V and is specified for a temperature range of -40°C to +125°C, making it suitable for harsh automotive environments. Typical applications for the L9957-TR include automotive body control modules, industrial motor control, and power distribution systems. In automotive applications, it can be used to drive exterior lighting, fuel pumps, and other high-side loads. In industrial settings, it is ideal for driving solenoids, valves, and relays in programmable logic controllers (PLCs) and factory automation equipment. The device's high voltage capability and fast switching make it a versatile choice for a wide range of high-side switching applications. When designing with the L9957-TR, it is important to consider the thermal performance of the SO-8 package. The device's power dissipation is limited by the package's thermal resistance, so adequate PCB copper area and thermal vias are recommended for high-current or high-temperature applications. Additionally, proper decoupling capacitors should be placed close to the supply pins to ensure stable operation and minimize switching noise.
L9958 - Low RDSON SPI Controlled H-Bridge | STMicroelectronics
The L9958 is an SPI-controlled H-Bridge motor driver from STMicroelectronics, designed for the control of DC and stepper motors in safety-critical applications and under extreme environmental conditions. It is housed in a PowerSO-20 package with an exposed pad, providing excellent thermal performance for high-current motor driving. The device integrates a low RDSON output stage, enabling efficient power delivery with minimal heat dissipation. An H-Bridge is a fundamental electronic circuit that allows a voltage to be applied across a load in either direction, enabling bidirectional control of DC motors and precise stepping of stepper motors. The L9958 is a specific implementation of this topology, adding an SPI interface for digital control and diagnostics, making it suitable for automotive and industrial applications where reliable, fault-tolerant motor control is required. As a motor driver, it sits within the broader category of power management ICs, specifically within motor drivers and controllers. Key features of the L9958 include its SPI-controlled interface, which allows for flexible configuration and real-time monitoring of the motor state. The low RDSON of the output stage minimizes power losses, improving overall system efficiency. The device is designed to operate under extreme environmental conditions, making it suitable for automotive under-the-hood applications. It also includes protection features such as overcurrent and overtemperature shutdown, ensuring safe operation in fault conditions. The L9958 is built using a robust CMOS process, which provides high noise immunity and low quiescent current. The SPI interface supports daisy-chaining of multiple devices, simplifying system design in multi-motor applications. The device operates over a wide supply voltage range, accommodating various automotive and industrial power rails. The PowerSO-20 package with exposed pad ensures efficient heat transfer to the PCB, allowing the device to handle continuous currents without exceeding thermal limits. Typical applications for the L9958 include automotive DC motor control for window lifts, seat adjustment, and mirror positioning, as well as industrial automation for conveyor belts and robotic actuators. Its SPI interface and diagnostic capabilities make it ideal for safety-critical systems where monitoring and fault detection are essential. The device's ability to drive both DC and stepper motors adds versatility, reducing the need for multiple driver ICs in a design. When designing with the L9958, it is important to ensure proper PCB layout for thermal management, particularly when driving high currents. The exposed pad should be connected to a large copper area to dissipate heat effectively. Additionally, the SPI interface should be properly terminated and decoupled to ensure reliable communication in noisy environments.
L9959 - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
The L9959 is a versatile 8-channel low-side driver from STMicroelectronics, designed for automotive and industrial applications requiring multiple grounded loads. It integrates an SPI interface for control and diagnostics, making it ideal for driving relays, LEDs, and small solenoids. The device operates from a 4.5V to 5.5V supply and features a 40V load voltage capability, with each channel capable of sinking up to 1.2A continuous current. The L9959 is available in a PowerSO-20 package, providing a compact solution for space-constrained designs. A low-side driver is a type of power switch that connects the load to ground when activated, allowing the load to be powered from a positive supply. In automotive systems, low-side drivers are commonly used to control lamps, relays, and actuators, where the load is connected between the battery positive and the driver output. The L9959 fits into the broader category of smart power switches, which integrate protection and diagnostic features to enhance system reliability. These devices are essential in modern vehicle body control modules, where multiple loads must be managed efficiently. Key features of the L9959 include an SPI interface for serial control and readback of diagnostic information, a 40V load voltage rating, and a low quiescent current of 10 µA in standby mode. Each output can sink up to 1.2A, and the device includes overcurrent, overtemperature, and open-load detection for robust protection. The SPI interface operates at up to 5 MHz, enabling fast communication with microcontrollers. The PowerSO-20 package offers excellent thermal performance, with a thermal resistance of 35 °C/W, allowing operation at high ambient temperatures. The L9959 is built using STMicroelectronics' BCD (Bipolar-CMOS-DMOS) technology, which combines low-power CMOS logic with high-voltage DMOS power stages. This architecture enables efficient switching and precise analog diagnostics. The device includes a 16-bit SPI register for configuration and status readback, allowing real-time monitoring of output states and fault conditions. The integrated protection features ensure safe operation under short-circuit and thermal stress, reducing the need for external components. Typical applications include automotive body control modules, where the L9959 drives exterior and interior lighting, relays, and small motors. It is also used in industrial PLCs for controlling solenoids and valves, and in building automation for lighting control. The SPI interface simplifies wiring and reduces the number of microcontroller I/O pins required, making it a cost-effective solution for multi-channel switching. When designing with the L9959, ensure proper decoupling of the VCC supply with a 100 nF ceramic capacitor placed close to the pin. The SPI lines should be kept short and shielded to minimize noise, and the ground plane should be solid to handle the return currents from multiple outputs. Thermal management is critical when driving high currents; use adequate copper area on the PCB to dissipate heat.
L9959-TR - Single/Dual PMOS High-Side H-Bridge | STMicroelectronics
The L9959-TR from STMicroelectronics is a single and dual integrated H-bridge driver designed for resistive and inductive loads, featuring output current direction control and supervising functions. It is part of the L9959 family, which includes L9959S, L9959U, and L9959T variants, all offering high-side PMOS architecture for robust automotive and industrial motor control applications. The device is available in a PowerSO-36 package, providing a compact solution for driving brushed DC motors, solenoids, and relays. An H-bridge is a fundamental electronic circuit that enables a load to be driven in both directions by controlling the polarity of the voltage applied across it. In motor control, H-bridges are essential for bidirectional rotation, braking, and speed control. The L9959 integrates the high-side PMOS switches and low-side NMOS switches, along with protection and diagnostic features, into a single IC, simplifying PCB design and reducing component count compared to discrete implementations. This integration is critical in automotive body control modules, where space and reliability are paramount. Key features of the L9959-TR include dual H-bridge channels, each capable of driving loads up to 8.5A peak current, with a wide operating voltage range from 4.5V to 28V. The device supports both direct pin control (PWM and DIR) and SPI register control (SPWM and SDIR), offering flexibility in system design. It includes comprehensive protection features such as overcurrent, overtemperature, and short-circuit protection, along with diagnostic feedback via SPI, enabling robust fault management in safety-critical applications. The L9959-TR utilizes a PMOS high-side architecture, which eliminates the need for charge pumps and reduces quiescent current, making it suitable for battery-powered and always-on automotive systems. The device is AEC-Q100 qualified, ensuring reliability under harsh automotive conditions, and is compliant with RoHS and REACH regulations. Its PowerSO-36 package with exposed pad provides excellent thermal performance, allowing continuous operation at high currents with proper PCB layout. Typical applications include automotive body control modules, DC motor drivers for window lifts, seat adjusters, and mirror controls, as well as industrial actuators and solenoid drivers. The device's ability to handle inductive loads with built-in freewheeling diodes makes it ideal for driving relays and solenoids without external clamping components. When designing with the L9959-TR, ensure proper decoupling of the supply pins with a 100nF ceramic capacitor and a 10uF electrolytic capacitor. The SPI interface allows for advanced configuration and diagnostics, but for simple applications, the direct PWM/DIR control pins can be used. Thermal management is critical; the exposed pad must be soldered to a copper area for heat dissipation, and the maximum junction temperature of 150°C should not be exceeded.
L9960 - Dual H-Bridge Motor Driver | STMicroelectronics | Automotive
The STMicroelectronics L9960 is a dual H-bridge motor driver designed for automotive and industrial applications, capable of driving two DC motors or one stepper motor with currents up to 8 A per bridge. It operates from a supply voltage range of 4.5 V to 28 V, making it suitable for 12 V and 24 V systems. The device is housed in a 48-pin TQFP (EP) package with an exposed pad for enhanced thermal performance. A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into high-current, high-voltage signals to drive motors. It typically includes H-bridge topologies for bidirectional control, protection features such as overcurrent and thermal shutdown, and diagnostic interfaces. Motor drivers are a subset of power management ICs, which manage and distribute power within electronic systems. Key features of the L9960 include a low RDS(on) of 0.15 ohm per switch, which minimizes power dissipation and improves efficiency. It integrates a 10-bit current sense ADC for precise motor current monitoring, and a SPI interface for configuration and diagnostics. The device also features PWM current regulation, overcurrent protection, and thermal shutdown, ensuring robust operation in harsh environments. The L9960 uses a smart power technology that combines high-voltage power MOSFETs with CMOS control logic on a single die. This integration reduces external component count and enhances reliability. The SPI interface allows real-time monitoring of bridge currents and fault conditions, enabling advanced motor control algorithms and predictive maintenance. Typical applications include automotive body control modules, electric power steering, HVAC actuators, and industrial automation. In automotive body control, the L9960 drives window lifters, seat adjusters, and mirror motors with precise current control. In industrial settings, it controls conveyor belts and robotic arms with high reliability. When designing with the L9960, ensure adequate PCB copper area for heat dissipation, especially at high currents. The exposed pad must be soldered to a thermal via array to maintain junction temperature within limits. Proper decoupling capacitors on the supply and logic pins are essential to minimize voltage transients.