Motor Drivers
Products (104)
L9906 - 3-Phase BLDC Motor Driver | STMicroelectronics | 64-TQFP
The STMicroelectronics L9906 is a high-performance 3-phase brushless DC (BLDC) motor driver IC designed for automotive and industrial applications. It integrates gate drivers for external N-channel MOSFETs, enabling precise motor control with low electromagnetic emissions. The device is housed in a 64-pin TQFP package, providing a compact solution for motor control units. A motor driver IC is a power management integrated circuit that translates low-power control signals from a microcontroller into high-current signals capable of driving motor windings. In a BLDC motor system, the driver controls the commutation sequence of the three phases, ensuring smooth rotation and efficient operation. The L9906 sits between the microcontroller and the power stage, providing the necessary gate drive, protection, and diagnostic functions. Key features of the L9906 include support for 3-phase BLDC motors, integrated gate drivers for external MOSFETs, and a wide operating voltage range suitable for 12V automotive systems. The device offers thermal shutdown protection, current sensing, and diagnostic feedback, enhancing system reliability. Its low electromagnetic emission design helps meet automotive EMC standards. The L9906 utilizes a sophisticated architecture that includes charge pumps for high-side gate drive, current sense amplifiers, and protection circuits. The device is designed to operate in harsh environments, with a junction temperature range of -40°C to +150°C. The 64-pin TQFP package offers good thermal performance and is suitable for surface-mount assembly. Typical applications include automotive engine cooling fans, electric power steering, and industrial motor control. The L9906 is also used in HVAC blowers and pumps, where reliable and efficient motor control is essential. Its robust design and comprehensive protection features make it a preferred choice for demanding applications. When designing with the L9906, ensure proper PCB layout to minimize parasitic inductance and optimize thermal dissipation. The device requires careful selection of external MOSFETs and bootstrap capacitors to achieve optimal performance. Refer to the STMicroelectronics application notes for detailed design guidelines.
L9906-TR - Automotive 3-Phase Brushless DC Motor Driver | STMicroelectronics
The L9906-TR is an automotive-grade, 3-phase brushless DC (BLDC) motor driver IC from STMicroelectronics, designed for high-reliability motor control applications. It integrates a triple half-bridge gate driver with a 5.5V to 18V supply range, capable of driving external N-channel MOSFETs for motor currents up to 10A (depending on external FETs). The device is housed in a 48-pin LQFP package (7x7 mm) with exposed pad, suitable for compact automotive electronic control units (ECUs). A brushless DC (BLDC) motor driver is a power management IC that controls the commutation of a BLDC motor by sequentially energizing its stator windings. It sits between the microcontroller (MCU) and the power stage, translating low-voltage logic signals into high-current gate drive signals for external power MOSFETs. In the system hierarchy, it belongs to: BLDC motor driver -> motor driver -> power management IC -> semiconductor. This device is essential in automotive applications where precise, efficient, and reliable motor control is required. Key features of the L9906-TR include a wide operating voltage range (5.5V to 18V), three high-side and three low-side gate driver outputs with 1A peak source/sink current, and integrated bootstrap diodes for high-side driving. It also provides a 5V/100mA voltage regulator for powering the MCU or logic circuits, a SPI interface for configuration and diagnostics, and comprehensive protection features such as overcurrent, overvoltage, undervoltage, and thermal shutdown. The device is AEC-Q100 qualified, ensuring automotive-grade reliability. Technically, the L9906-TR uses a smart power architecture with a charge pump for high-side gate drive, enabling 100% duty cycle operation. The SPI interface allows real-time monitoring of fault conditions and flexible configuration of dead-time and slew-rate settings. The device supports both sensorless and sensor-based commutation, making it versatile for various motor control algorithms. Its low quiescent current (typically 5mA) in standby mode helps reduce battery drain in automotive systems. Typical applications include electric power steering (EPS), engine cooling fans, oil pumps, water pumps, and other automotive BLDC motor control systems. The device's robust protection and diagnostic features make it ideal for safety-critical applications where motor failure could compromise vehicle operation. When designing with the L9906-TR, ensure proper PCB layout with adequate copper area for thermal dissipation, and place decoupling capacitors close to the supply pins. The SPI interface should be isolated from high-current traces to avoid noise coupling. Also, verify the bootstrap capacitor sizing for high-side gate drive at the desired PWM frequency.
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.
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.
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.
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.
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-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.
L9960-TR - Dual H-Bridge Motor Driver | STMicroelectronics | Automotive
The L9960-TR is a dual H-bridge motor driver IC from STMicroelectronics, designed for automotive and industrial applications requiring bidirectional control of two DC motors or one stepper motor. It integrates two full H-bridges with low RDS(on) power MOSFETs, capable of delivering continuous output current up to 6 A per bridge (with proper thermal management). The device operates from a supply voltage range of 4.5 V to 28 V, making it suitable for 12 V and 24 V automotive systems. It is available in a PowerSSO-36 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 high-current, high-voltage signals to drive motors. It typically includes H-bridge configurations to allow bidirectional current flow, enabling forward and reverse motor rotation. Motor drivers are a subset of power management ICs, which manage and distribute electrical power within a system. The L9960-TR fits into this hierarchy as a power management IC specifically optimized for motor control, bridging the gap between digital logic and electromechanical actuation. Key features of the L9960-TR include a low RDS(on) of 0.3 ohm per MOSFET (typical), which minimizes power dissipation and improves efficiency. It incorporates a serial peripheral interface (SPI) for advanced diagnostics and control, allowing real-time monitoring of load current, supply voltage, and junction temperature. The device also features overcurrent, overtemperature, and undervoltage protection, ensuring robust operation in harsh environments. Its PWM frequency capability up to 20 kHz enables quiet and efficient motor speed control. The L9960-TR utilizes a smart power technology that integrates CMOS control logic with vertical MOSFET power stages on a single die. This architecture reduces external component count and enhances reliability. The SPI interface provides 16-bit read/write registers for configuration and diagnostics, enabling precise control and fault detection. The device is AEC-Q100 qualified, meeting stringent automotive quality standards, and is RoHS compliant. Typical applications include automotive power windows, seat adjustment, mirror positioning, and HVAC actuators. It is also used in industrial automation for conveyor belt control, robotic actuators, and valve positioning. The wide supply voltage range and high current capability make it versatile for various motor control scenarios. When designing with the L9960-TR, ensure adequate PCB copper area for heat dissipation, especially when driving high currents continuously. The exposed pad on the PowerSSO-36 package must be soldered to a thermal land pattern to achieve the specified thermal resistance. Additionally, place decoupling capacitors close to the supply pins to minimize voltage transients during switching.
L9960TR - Dual H-Bridge Motor Driver | STMicroelectronics | Automotive
The STMicroelectronics L9960TR is a dual H-bridge motor driver designed for automotive and industrial applications, capable of driving two DC motors or one stepper motor with up to 6A continuous current per channel. It operates from a supply voltage range of 4.5V to 28V, making it suitable for 12V and 24V systems. The device is housed in a PowerSSO-36 package with 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 topology for bidirectional current control, protection features such as overcurrent and thermal shutdown, and diagnostic feedback. Motor drivers are a subset of power management ICs, which manage and distribute power within electronic systems. Key features of the L9960TR include dual H-bridge architecture, SPI interface for configuration and diagnostics, PWM current control with programmable slew rate, and comprehensive protection including undervoltage lockout, overcurrent, and overtemperature shutdown. The device also features a low quiescent current in standby mode, making it suitable for battery-powered applications. The L9960TR utilizes a robust power MOSFET output stage with low RDS(on) to minimize power dissipation. The SPI interface allows real-time monitoring of output currents and fault conditions, enabling advanced diagnostic capabilities. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments. Typical applications include automotive DC motor control for window lifts, seat adjustment, and mirror positioning, as well as industrial automation for conveyor belts and robotic actuators. The device's wide voltage range and high current capability make it versatile for various motor control scenarios. When designing with the L9960TR, ensure proper PCB layout with adequate copper area for thermal dissipation, and place decoupling capacitors close to the supply pins. The SPI interface should be isolated from high-current traces to minimize noise coupling.
L9969 - Automotive H-Bridge Driver | STMicroelectronics | Motor Control
The STMicroelectronics L9969 is an automotive-grade integrated circuit designed for single and dual H-bridge motor control applications. It provides a full H-bridge power stage consisting of two half bridges, intended primarily for the control of DC motors, resistive loads, and inductive loads. The device is available in PowerSSO-24 (single H-bridge) and PowerSSO-36 (dual H-bridge) packages, offering flexible integration for various automotive actuator systems. An H-bridge driver is a power management IC that enables bidirectional current flow through a load, typically a DC motor, by controlling four switching elements (transistors) arranged in an H configuration. It sits within the motor driver hierarchy, which includes the power stage, gate drivers, protection circuitry, and control logic. The L9969 integrates these functions, providing output current direction control and supervising functions, making it a critical component in automotive actuator control systems. Key features of the L9969 include dual H-bridge capability (in the PowerSSO-36 variant), output current direction control, and comprehensive supervising functions such as overcurrent, overtemperature, and undervoltage protection. The device supports independent input driving commands for each half bridge, allowing flexible motor control configurations. It is designed to operate over a wide automotive temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments. The L9969 is built on STMicroelectronics' robust automotive-grade process technology, meeting the stringent quality and reliability standards of the automotive industry. It is AEC-Q100 qualified, ensuring suitability for safety-critical applications. The device incorporates advanced diagnostic features, including open-load detection and short-circuit protection, which are essential for functional safety in automotive systems. Typical applications include throttle control actuators, HVAC flap control, mirror adjustment, seat positioning, and other DC motor-driven actuators in vehicles. The dual H-bridge configuration allows control of two independent motors or a single motor with higher current capability by paralleling the outputs. The device's robust protection features and automotive qualification make it suitable for both body control modules and powertrain applications. When designing with the L9969, ensure proper PCB layout for the power stage to minimize parasitic inductance and resistance. Use appropriate bulk and decoupling capacitors on the power supply pins, and provide adequate thermal management through copper pours and vias. The device's SPI interface (where available) allows for high-speed configuration and diagnostics, while the parallel input interface provides simple, direct motor control.
L9970-TR - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
The L9970-TR is an automotive-grade dual H-bridge motor driver IC from STMicroelectronics, designed for driving DC motors and stepper motors in automotive and industrial applications. It integrates two full H-bridges capable of delivering continuous output current up to 1.2 A per channel, with a supply voltage range from 5.5 V to 36 V. The device is housed in a PowerSO-20 package, providing 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 levels required to drive electric motors. In the system hierarchy, a motor driver sits between the MCU and the motor, acting as a power amplifier and protection interface. It typically includes H-bridge topologies for bidirectional control, current sensing, and diagnostic feedback. Motor drivers are essential in automotive systems such as power windows, seat adjustment, mirror positioning, and HVAC actuators, where precise and reliable motor control is critical. Key features of the L9970-TR include a wide operating voltage range of 5.5 V to 36 V, making it suitable for both 12 V and 24 V automotive electrical systems. Each H-bridge can source or sink up to 1.2 A continuous current, with peak current capability of 2 A. The device includes built-in protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout, ensuring robust operation in harsh automotive environments. The PowerSO-20 package offers a low thermal resistance of 35 °C/W, enabling efficient heat dissipation without external heatsinks in moderate load conditions. The L9970-TR utilizes a standard H-bridge architecture with four power MOSFETs per channel, controlled by logic-level inputs. The device supports both DC motor and stepper motor configurations, with the ability to control direction and speed via PWM signals. The integrated current sensing feature allows for closed-loop torque control, improving system efficiency and performance. The device is AEC-Q100 qualified, meeting the stringent reliability requirements of automotive applications. Typical applications include automotive power windows, seat adjustment, mirror control, HVAC actuators, and industrial automation systems. The wide input voltage range and robust protection features make it ideal for use in 12 V and 24 V systems, where reliability and safety are paramount. The device can also be used in robotics and mechatronics applications requiring bidirectional motor control. When designing with the L9970-TR, ensure adequate PCB copper area for thermal dissipation, especially when driving loads near the maximum current rating. Place decoupling capacitors close to the supply pins to minimize voltage transients. The device's enable and diagnostic pins allow for system-level fault monitoring, which is essential for safety-critical applications.
L9971 - Automotive Dual H-Bridge Driver | STMicroelectronics
The L9971 is a dual H-bridge driver IC from STMicroelectronics, designed for automotive and industrial DC motor control applications. It integrates two independent H-bridge outputs capable of driving DC motors, stepper motors, or other inductive loads with a supply voltage range of 5.5V to 36V. The device is available in a PowerSO-20 package, providing a compact solution for motor control in space-constrained automotive modules. A dual H-bridge driver is a power management IC that contains two full H-bridge circuits, each capable of driving a DC motor in both directions (forward and reverse) and providing braking. It is a type of motor driver, which falls under the broader category of power management ICs. The L9971 integrates the power stage, control logic, and protection features, simplifying the design of motor control systems. Key features of the L9971 include a low quiescent current in standby mode, making it suitable for battery-powered automotive applications. It provides overcurrent, overtemperature, and short-circuit protection, ensuring robust operation in harsh environments. The device also features a serial peripheral interface (SPI) for advanced control and diagnostics, allowing the microcontroller to monitor and configure the driver in real time. The L9971 uses a smart power technology that combines bipolar CMOS and DMOS (BCD) processes, enabling high-current driving capability with low power dissipation. The integrated protection and diagnostic features reduce the need for external components, lowering the overall system cost and improving reliability. The device is designed to meet automotive quality standards, including AEC-Q100 qualification, ensuring reliable operation over the automotive temperature range of -40°C to +150°C. Typical applications include automotive power windows, sunroofs, seat adjustment, and other DC motor control systems. The L9971 is also suitable for industrial automation, robotics, and other applications requiring bidirectional control of DC motors. Its wide supply voltage range and robust protection make it a versatile choice for various motor control designs. When designing with the L9971, ensure proper PCB layout to minimize parasitic inductance and provide adequate thermal management. The PowerSO-20 package has an exposed pad that should be soldered to a large copper area for heat dissipation. Additionally, place decoupling capacitors close to the supply pins to reduce voltage spikes during switching.
L9972 - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
The STMicroelectronics L9972 is a dual H-bridge motor driver designed for automotive applications, capable of driving two DC motors or one stepper motor with a supply voltage range of 5.5V to 36V. It integrates two full H-bridges with a maximum output current of 1.2A per channel, making it suitable for a variety of automotive actuators such as mirror adjustment, headlamp leveling, and HVAC flap control. A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher current and voltage needed to drive a motor. In automotive systems, motor drivers are essential for controlling the position of mirrors, seats, and valves, and they must operate reliably over a wide temperature range and withstand harsh electrical conditions. The L9972 belongs to the family of automotive motor drivers, which are a subset of power management ICs used in body control modules and other vehicle subsystems. Key features of the L9972 include a low quiescent current of 50 µA in standby mode, which is critical for minimizing battery drain in vehicles. It also features overcurrent and thermal shutdown protection, ensuring robust operation in demanding environments. The device is available in a PowerSO-20 package, which provides excellent thermal performance for high-current applications. The L9972 is AEC-Q100 qualified, meeting the stringent quality standards required for automotive electronics. The L9972 uses a standard H-bridge topology with integrated freewheeling diodes, allowing bidirectional control of DC motors. It supports both parallel and serial control interfaces, with a SPI interface for advanced diagnostics and configuration. The device can operate in a half-bridge or full-bridge mode, providing flexibility in system design. The integrated protection features include undervoltage lockout, overvoltage clamp, and overtemperature shutdown, which help prevent damage to the motor and the driver itself. Typical applications for the L9972 include automotive mirror adjustment systems, headlamp leveling actuators, and HVAC flap control. In these applications, the L9972 provides precise motor control with low power dissipation, enabling efficient and reliable operation. The wide supply voltage range and robust protection features make it suitable for use in 12V and 24V automotive electrical systems. When designing with the L9972, it is important to ensure proper PCB layout to minimize parasitic inductance and provide adequate thermal relief for the PowerSO-20 package. The SPI interface should be used for diagnostics and to configure the device for specific motor characteristics. Additionally, the supply voltage should be decoupled with a capacitor close to the VCC pin to reduce voltage transients.
L9972-TR - Automotive Dual H-Bridge Driver | STMicroelectronics
The L9972-TR is a dual H-bridge driver IC from STMicroelectronics, designed for automotive and industrial DC motor control applications. It integrates two independent H-bridge outputs capable of driving DC motors, stepper motors, or solenoids with a supply voltage range of 5.5V to 36V and a continuous output current of up to 1.2A per channel. The device is housed in a PowerSO-20 package with an exposed pad for enhanced thermal performance, making it suitable for space-constrained automotive modules. A dual H-bridge driver is a power management IC that contains two full H-bridge circuits, each consisting of four power transistors (typically MOSFETs) arranged to control the direction and speed of a DC motor by selectively switching the polarity of the voltage applied to the motor terminals. This configuration allows for forward, reverse, brake, and coast operations, making it a fundamental building block in motor control systems. In the broader system hierarchy, the L9972-TR sits within the motor driver category, which is part of the power management IC family, ultimately contributing to the electromechanical actuation layer of automotive and industrial systems. Key features of the L9972-TR include a low quiescent current of 50 µA in standby mode, which is critical for battery-powered automotive applications to minimize drain when the ignition is off. The device also provides overcurrent, overtemperature, and undervoltage lockout protection, ensuring robust operation in harsh environments. The SPI interface allows for advanced diagnostics and configuration, enabling real-time monitoring of load conditions and fault status. The PowerSO-20 package offers a thermal resistance of 35 °C/W, facilitating heat dissipation in high-current applications. From a technical architecture perspective, the L9972-TR employs a CMOS process with integrated power MOSFETs, eliminating the need for external freewheeling diodes in many applications. The H-bridge outputs are designed to handle inductive loads with built-in flyback protection, reducing external component count and simplifying PCB layout. The SPI interface operates at up to 5 MHz, providing fast communication with a microcontroller for precise motor control and diagnostic feedback. Typical applications include automotive power window lifts, seat adjustment motors, mirror adjustment, and HVAC flap control. The device is also suitable for industrial automation, robotics, and small appliance motor drives where bidirectional control and diagnostic capabilities are required. Its wide supply voltage range and robust protection features make it a versatile choice for 12V and 24V systems. When designing with the L9972-TR, ensure adequate PCB copper area for the exposed pad to maintain junction temperature below the maximum rating. The SPI interface should be isolated from high-current traces to prevent noise coupling, and a bulk capacitor of at least 100 µF should be placed near the supply pins to handle inrush currents during motor start-up.
L9973 - Dual H-Bridge Motor Driver | STMicroelectronics | Automotive
The STMicroelectronics L9973 is a dual H-bridge motor driver designed for automotive and industrial applications, capable of driving two DC motors or one stepper motor with a supply voltage range of 5.5V to 36V. It integrates two full H-bridges with a continuous output current of 1.2A per channel and a peak current of 2A, making it suitable for a variety of actuator and motor control tasks. 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 an electric motor. In the system hierarchy, a motor driver sits between the logic-level controller and the motor itself, providing the necessary power amplification, protection, and control features. The L9973 belongs to the category of power management ICs, specifically motor drivers, which are essential in automotive body control modules, HVAC systems, and industrial automation. Key features of the L9973 include a wide operating voltage range, low quiescent current, and integrated protection features such as overcurrent, overtemperature, and undervoltage lockout. The device also features a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and configure the driver. The package is a PowerSO-20, which provides excellent thermal performance for high-current applications. The L9973 uses a standard H-bridge topology with four power MOSFETs per channel, enabling bidirectional motor control. The SPI interface allows for daisy-chaining multiple devices, simplifying PCB layout in multi-motor systems. The device is designed to meet automotive quality standards, including AEC-Q100 qualification, ensuring reliable operation in harsh environments. Typical applications include automotive power windows, seat adjustment, mirror control, and HVAC flap control. The wide voltage range and robust protection make it ideal for industrial actuators and robotics as well. The SPI interface provides real-time diagnostics, which is critical for safety-critical applications. When designing with the L9973, ensure proper PCB layout with adequate copper area for heat dissipation, especially when driving high currents. The SPI lines should be kept short and shielded to avoid noise, and the supply pins should be decoupled with a 100nF ceramic capacitor close to the device.
L9973-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
The L9973-TR is a quad half-bridge driver IC from STMicroelectronics, designed for automotive and industrial DC motor control applications. It integrates four independent half-bridge outputs capable of driving loads up to 1.2A continuous per channel, with a supply voltage range of 5.5V to 36V. The device is housed in a PowerSO-20 package, providing a compact solution for driving brushed DC motors, stepper motors, and resistive loads. A half-bridge driver is a power management IC that controls the direction and speed of a DC motor by selectively connecting the motor terminals to the supply voltage or ground. In a quad half-bridge configuration, four such bridges are integrated into a single package, enabling independent control of multiple loads or the implementation of full H-bridge topologies for bidirectional motor control. This architecture is fundamental in automotive body control modules, where multiple actuators such as window lifts, mirror adjusters, and seat motors require precise and efficient switching. Key features of the L9973-TR include a low quiescent current of 50 uA in standby mode, making it suitable for always-on automotive applications. The device offers overcurrent, overtemperature, and short-circuit protection, ensuring robust operation in harsh environments. It also features a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and configure output behavior. The PowerSO-20 package with exposed pad provides excellent thermal performance, with a thermal resistance of 35 C/W, enabling reliable operation at high ambient temperatures up to 125C. The L9973-TR utilizes a smart power technology that integrates CMOS control logic with high-current DMOS output stages. This monolithic approach reduces external component count and improves reliability compared to discrete solutions. The SPI interface supports daisy-chaining of multiple devices, simplifying wiring in multi-motor systems. The device also includes a dedicated enable pin for fast shutdown in emergency situations. Typical applications include automotive body control modules, DC motor drivers for window lifts and wiper systems, stepper motor drivers for instrument clusters, and industrial automation actuators. The wide supply voltage range and robust protection features make it ideal for 12V and 24V systems. When designing with the L9973-TR, ensure adequate PCB copper area for heat dissipation, especially when driving multiple channels at high current. The SPI interface requires proper pull-up resistors on the data lines, and the enable pin should be tied to a controlled logic signal to prevent unintended operation during power-up.
L9974 - Automotive Dual H-Bridge Driver | STMicroelectronics
The STMicroelectronics L9974 is a dual H-bridge driver designed for automotive DC motor control applications. It integrates two full H-bridges capable of driving two DC motors or one stepper motor, with a supply voltage range of 5.5V to 36V and a continuous output current of 1.2A per channel (peak 2A). The device is housed in a PowerSO-20 package with exposed pad for enhanced thermal performance. A dual H-bridge driver is a power management IC that controls the direction and speed of DC motors by selectively switching four transistors per bridge. It sits within the motor driver hierarchy: dual H-bridge driver -> motor driver -> power management IC -> semiconductor. This architecture allows bidirectional current flow through the motor, enabling forward, reverse, and braking operations. The L9974 is specifically optimized for automotive environments, meeting AEC-Q100 Grade 1 requirements for operation from -40°C to +150°C. Key features include a low quiescent current of 50 µA in standby mode, SPI interface for diagnostics and control, and integrated protection features such as overcurrent, overtemperature, and undervoltage lockout. The device also provides a current sense output for closed-loop motor control, enabling precise torque and speed regulation. The SPI interface allows real-time monitoring of fault conditions and configuration of the driver parameters, making it suitable for advanced automotive body control modules. The L9974 utilizes a smart power technology that combines CMOS control logic with high-voltage power MOSFETs on a single die. This integration reduces external component count and improves reliability. The PowerSO-20 package offers a thermal resistance of 35°C/W, allowing efficient heat dissipation in high-current applications. The device is designed to withstand load dump and reverse battery conditions, ensuring robust operation in harsh automotive environments. Typical applications include automotive HVAC actuators, headlamp leveling, mirror adjustment, and seat positioning systems. The dual H-bridge configuration allows independent control of two motors, reducing board space and system cost. The SPI interface simplifies wiring and enables advanced diagnostic features required by modern vehicle architectures. When designing with the L9974, ensure proper PCB layout with adequate copper area for thermal management. The exposed pad must be soldered to a thermal via array to achieve the specified thermal performance. Additionally, place a 100 nF ceramic capacitor close to each supply pin to suppress high-frequency noise and ensure stable operation.
L9974-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
The L9974-TR is a quad half-bridge driver IC from STMicroelectronics, designed for automotive and industrial DC motor control applications. It integrates four independent half-bridge outputs capable of driving loads up to 1.2A continuous per channel, with a supply voltage range of 5.5V to 36V. The device is housed in a PowerSO-20 package, providing excellent thermal performance for high-current switching. A half-bridge driver is a power management IC that controls the direction and speed of DC motors by selectively connecting the motor terminals to the supply or ground. In a full H-bridge configuration, two half-bridges are combined to drive a motor bidirectionally. The L9974-TR simplifies this by integrating four half-bridges, allowing control of two DC motors or one stepper motor with minimal external components. This category sits within the broader hierarchy of motor drivers, which are essential in automotive systems such as power windows, seat adjustment, and mirror positioning. Key features of the L9974-TR include a low quiescent current of 10uA in standby mode, making it suitable for battery-powered automotive applications. It offers overcurrent, overtemperature, and short-circuit protection, ensuring robust operation in harsh environments. The device also features a serial peripheral interface (SPI) for advanced diagnostics and control, allowing the microcontroller to read fault status and configure output states. The PowerSO-20 package has a thermal resistance of 35 C/W, enabling efficient heat dissipation. Technically, the L9974-TR uses a smart power technology that integrates CMOS control logic with high-current DMOS output stages. This architecture provides low on-resistance (0.5 ohm typical) and fast switching, reducing power losses. The SPI interface operates at up to 5 MHz, enabling real-time monitoring and control. The device is AEC-Q100 qualified, meeting the stringent reliability standards for automotive electronics. Typical applications include automotive body control modules, DC motor drivers for power windows and mirrors, and industrial automation systems. The wide input voltage range and robust protection make it ideal for 12V and 24V systems. In a power window application, the L9974-TR drives the window motor bidirectionally, with the SPI providing diagnostic feedback for stall detection. When designing with the L9974-TR, ensure proper PCB layout with adequate copper area for thermal dissipation. Place the supply decoupling capacitor close to the VCC pin to minimize voltage spikes during switching. The SPI lines should be kept short and shielded to avoid noise coupling.
L9975 - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
The STMicroelectronics L9975 is an automotive-grade dual H-bridge motor driver designed for DC motor control in automotive applications. It integrates two full H-bridges capable of driving two DC motors or one stepper motor, with a supply voltage range of 5.5V to 36V and output current up to 1.2A per channel. The device is housed in a PowerSO-20 package, providing robust thermal performance for automotive environments. 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 a motor. In the system hierarchy, the L9975 sits between the MCU and the motor, acting as a power amplifier and protection interface. It is a key component in automotive body control modules, where it controls window lifts, mirror adjustment, and seat positioning. Key features of the L9975 include a low quiescent current of 10 uA in standby mode, making it suitable for always-on automotive modules. It offers overcurrent, overtemperature, and short-circuit protection, ensuring reliable operation in harsh environments. The device also features a serial peripheral interface (SPI) for diagnostics and control, allowing the MCU to read fault status and configure the driver. The L9975 uses a standard H-bridge topology with integrated freewheeling diodes, eliminating the need for external clamping diodes. Its SPI interface enables advanced diagnostics, including open-load detection and overcurrent reporting. The device is AEC-Q100 qualified, meeting the stringent reliability requirements of automotive electronics. Typical applications include automotive window lift systems, mirror adjustment, seat positioning, and HVAC damper control. The wide supply voltage range and robust protection make it ideal for direct connection to the vehicle battery, withstanding load-dump and cold-crank transients. When designing with the L9975, ensure proper PCB layout with adequate copper area for thermal dissipation. The PowerSO-20 package has a thermal resistance of 35 C/W, so at maximum current and high ambient temperatures, a heatsink or large copper pour is recommended. Additionally, place the SPI lines with proper filtering to avoid noise coupling from the motor lines.
L9975-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
The L9975-TR is a monolithic quad half-bridge driver designed by STMicroelectronics for automotive and industrial DC motor control applications. It integrates four independent half-bridge outputs capable of driving loads up to 1.2 A continuous per channel, with a supply voltage range of 5.5 V to 36 V. The device is housed in a 28-pin SOIC (SO-28) package with an exposed pad for enhanced thermal performance, and is qualified to AEC-Q100 Grade 1 for operation from -40°C to +150°C junction temperature. A half-bridge driver is a power management IC that contains two power switches (high-side and low-side) per output, allowing bidirectional current flow through a load connected between the output and ground or supply. This topology enables forward, reverse, and braking control of DC motors, as well as driving resistive, inductive, or capacitive loads. The L9975-TR belongs to the family of motor driver ICs, which are essential in automotive body electronics, HVAC actuators, and industrial automation. Key features include a low quiescent current of 50 µA in standby mode, making it suitable for always-on automotive modules. Each output has built-in overcurrent protection, thermal shutdown, and a diagnostic output that reports fault conditions via a serial interface. The device also features a SPI-compatible control interface for configuring outputs and reading status, enabling precise motor control and system monitoring. The L9975-TR uses a smart power technology that integrates CMOS control logic with DMOS power stages, providing efficient switching with low RDS(on) of 0.5 Ω per switch. This architecture minimizes power dissipation and supports PWM frequencies up to 20 kHz for quiet motor operation. The device includes a charge pump for high-side gate drive, allowing operation with a single supply without external bootstrap components. Typical applications include automotive HVAC flap control, headlamp leveling, mirror adjustment, and industrial valve actuation. The wide supply range and robust protection make it ideal for 12 V and 24 V systems. In automotive environments, the AEC-Q100 qualification ensures reliability under extreme temperature and vibration. When designing with the L9975-TR, ensure proper PCB layout with adequate copper area for the exposed pad to dissipate heat. The SPI interface requires careful timing and pull-up resistors on the data lines. For high-current loads, consider external freewheeling diodes to protect the outputs during inductive switching.