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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.
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.
L9963 - Automotive Li-ion Battery Monitor IC | STMicroelectronics
The L9963 is a Li-ion battery monitoring and protection chip designed for high-reliability automotive applications and energy storage systems. It can monitor up to 14 stacked battery cells, meeting the requirements of 48 V and higher voltage systems. Each cell voltage is measured with high accuracy, and the device also supports on-chip coulomb counting for current measurement. The L9963 is housed in a 64-TQFP-EP (10x10) package, making it suitable for space-constrained automotive battery management systems (BMS). A battery monitoring IC (BMIC) is a specialized integrated circuit that measures the voltage, current, and temperature of individual cells in a battery pack. It is a critical component in battery management systems, which ensure safe and efficient operation of lithium-ion batteries. The BMIC sits between the battery cells and the microcontroller (MCU), providing accurate data for state-of-charge (SoC) and state-of-health (SoH) estimation. In the hierarchy of power management, a BMIC is a type of analog front-end (AFE) IC, which falls under the broader category of battery management ICs, which are part of power management integrated circuits (PMICs). Key features of the L9963 include high-accuracy cell voltage measurement, on-chip coulomb counting for current sensing, and a comprehensive set of fault detection and notification functions to meet safety standard requirements. The device is designed for automotive applications, ensuring robust operation in harsh environments. It supports up to 14 cells in series, enabling use in 48 V and higher voltage battery systems. The L9963 also features a voltage regulator and bootstrap circuitry to generate stable internal references, ensuring measurement accuracy. From a technical perspective, the L9963 utilizes a precision analog front-end architecture with two internal bandgaps that are constantly monitored to guarantee measurement accuracy. The device can be supplied directly from the battery it monitors, simplifying system design. It includes a comprehensive fault detection mechanism, including overvoltage, undervoltage, and temperature monitoring, which is essential for meeting automotive safety standards such as ISO 26262. The L9963 is designed to work with the L9963E and L9963F variants, which offer enhanced features for specific applications. Typical applications include electric vehicles (EVs), hybrid electric vehicles (HEVs), and energy storage systems (ESS). In an EV battery pack, the L9963 monitors each cell's voltage and temperature, providing data to the BMS controller for balancing and protection. In ESS, it ensures safe operation of large-scale battery banks. The device's high accuracy and robust fault detection make it ideal for these safety-critical applications. When designing with the L9963, it is important to consider the external components required for the voltage regulator and bootstrap circuitry. Proper PCB layout is critical to minimize noise and ensure accurate voltage measurements. Additionally, the device's communication interface should be carefully designed to ensure reliable data transfer in noisy automotive environments.
L9963-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9963-TR is a highly integrated automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for lithium-ion battery packs in electric vehicles (EVs), hybrid electric vehicles (HEVs), and energy storage systems. It provides precise cell voltage and temperature measurement, passive cell balancing, and robust communication interfaces, all in a compact TQFP-64 package. A battery monitoring IC (BMIC) is a specialized analog front-end that measures the voltage of each cell in a battery pack, monitors temperature, and controls balancing to ensure safe and efficient operation. It sits between the battery cells and the host microcontroller, converting analog cell voltages into digital data via an ADC and communicating over a serial interface. In the system hierarchy, the BMIC is part of the battery management system (BMS), which is a critical subsystem in automotive power electronics. Key features of the L9963-TR include 14-cell voltage measurement capability, a 16-bit ADC with high accuracy, and a built-in passive balancing function with up to 150 mA balancing current. It supports both SPI and daisy-chain communication, enabling scalable battery packs. The device operates over a wide supply voltage range and includes comprehensive diagnostic features such as overvoltage, undervoltage, and temperature monitoring, making it suitable for ISO 26262 functional safety applications. The L9963-TR is built on STMicroelectronics' robust automotive process technology, ensuring high reliability across the -40°C to +125°C temperature range. Its architecture includes a precision voltage reference, a multiplexed ADC, and a state machine for balancing control. The daisy-chain interface allows multiple devices to be connected in series, reducing wiring complexity in high-voltage battery packs. Typical applications include battery management systems for EVs, HEVs, and industrial energy storage. The device is also used in 48V mild-hybrid systems and backup power supplies. Its high accuracy and safety features make it ideal for applications where cell voltage monitoring is critical for battery longevity and safety. When designing with the L9963-TR, ensure proper PCB layout for the analog measurement paths to minimize noise, and use appropriate filtering on the cell inputs. The device requires careful thermal management when balancing current is high, and the SPI interface should be isolated if the host controller is not on the same ground reference.
L9964 - Automotive Battery Monitoring IC | STMicroelectronics
The STMicroelectronics L9964 is a highly integrated automotive battery monitoring and protection IC designed for 12V lead-acid and lithium-ion battery systems. It provides precise voltage, current, and temperature sensing, along with cell balancing and protection features, in a compact TSSOP-20 package. The device operates over a wide supply voltage range of 4.5V to 40V, making it suitable for automotive and industrial battery management applications. A battery monitoring IC is a specialized analog front-end that measures individual cell voltages, pack current, and temperature to enable state-of-charge (SoC) and state-of-health (SoH) estimation. It sits between the battery pack and the microcontroller, converting analog battery parameters into digital data via an integrated ADC. The L9964 belongs to the battery management IC category, which is a subset of power management ICs used in automotive, industrial, and consumer battery systems. Key features of the L9964 include a 16-bit delta-sigma ADC for high-accuracy voltage and current measurement, an integrated current sense amplifier with programmable gain, and a temperature sensor input. It supports passive cell balancing with internal MOSFETs, and includes overvoltage, undervoltage, overcurrent, and overtemperature protection. The device communicates via an SPI interface, enabling fast and reliable data transfer to the host microcontroller. The L9964 is built on STMicroelectronics' automotive-grade BCD (Bipolar-CMOS-DMOS) process technology, ensuring high reliability and robustness in harsh environments. It features a low-power sleep mode with a quiescent current of 10 uA, extending battery life in standby conditions. The device is AEC-Q100 qualified, meeting the stringent quality and reliability requirements of the automotive industry. Typical applications include automotive battery management systems (BMS) for start-stop vehicles, electric vehicles (EVs), and 48V mild-hybrid systems. It is also used in industrial battery backup systems, energy storage systems, and uninterruptible power supplies (UPS). The L9964's high accuracy and integrated protection make it ideal for applications where battery safety and longevity are critical. When designing with the L9964, ensure proper decoupling of the supply pins and careful PCB layout to minimize noise on the analog sense lines. The SPI interface should be isolated from high-current switching paths to prevent data corruption. Additionally, the thermal pad must be soldered to a copper pour for adequate heat dissipation during cell balancing operations.
L9964-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9964-TR is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery systems. It integrates a high-voltage input, precision voltage and current sensing, and a robust SPI interface for communication with a host microcontroller. The device operates over a wide supply range and is housed in a compact surface-mount package, making it suitable for space-constrained automotive battery management systems (BMS). A battery monitoring IC is a specialized analog front-end that measures cell voltages, pack currents, and temperatures to estimate state-of-charge (SoC) and state-of-health (SoH). It sits between the battery pack and the host controller, converting raw analog signals into digital data via an SPI or I2C interface. In the system hierarchy, it belongs to the battery management IC category, which is part of the broader power management IC family, ultimately serving the automotive electronics domain. Key features of the L9964-TR include a wide operating voltage range, high-accuracy voltage measurement, and integrated current sensing with programmable gain. It supports both lead-acid and lithium-ion chemistries, offering flexibility across different battery types. The device also includes built-in diagnostics and protection features, such as overvoltage and undervoltage detection, which are critical for automotive safety. Technically, the L9964-TR employs a precision analog front-end with a 16-bit ADC for voltage and current measurement, ensuring accurate SoC estimation. Its SPI interface operates at speeds up to 5 MHz, enabling fast data transfer to the host MCU. The device is designed to meet AEC-Q100 automotive qualification, ensuring reliability under harsh operating conditions, including temperature extremes from -40°C to +125°C. Typical applications include automotive start-stop systems, electric vehicle (EV) battery management, and industrial energy storage systems. In a start-stop system, the L9964-TR monitors the 12V battery to ensure reliable engine restart and to manage the increased electrical load during idle-stop. Its high accuracy and low power consumption make it ideal for always-on monitoring in vehicles. When designing with the L9964-TR, ensure proper decoupling on the supply pins and place the device close to the battery sense points to minimize noise. The SPI lines should be routed with controlled impedance to avoid signal integrity issues. Additionally, the device's thermal pad must be soldered to a copper pour for adequate heat dissipation, especially in high-current applications.
L9965A - Automotive Battery Monitoring IC | STMicroelectronics
The L9965A is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates a high-voltage analog front-end, a 12-bit ADC, and a LIN transceiver, enabling precise measurement of battery voltage, current, and temperature. The device operates from a supply voltage of 4.5V to 36V and is available in a compact VQFN-32 package, making it suitable for space-constrained automotive battery management systems (BMS). What is a battery monitoring IC? A battery monitoring IC is a specialized integrated circuit that measures and reports the state of a battery, including voltage, current, temperature, and state-of-charge (SoC). It is a critical component in battery management systems (BMS), which ensure safe and efficient battery operation. In the system hierarchy, a battery monitoring IC belongs to the battery management IC category, which is part of the broader power management IC family. These ICs are essential in automotive, industrial, and consumer applications where battery health and safety are paramount. Key features of the L9965A include a 12-bit ADC with a measurement accuracy of ±1%, a LIN transceiver compliant with LIN 2.2A, and a wide operating temperature range of -40°C to +125°C. The device also features a programmable watchdog timer, a 16-bit CRC for data integrity, and a low-power sleep mode with a quiescent current of 10 µA. These features enable reliable and accurate battery monitoring in harsh automotive environments. Technically, the L9965A employs a precision bandgap reference and a successive-approximation register (SAR) ADC architecture to achieve high measurement accuracy. The integrated LIN transceiver supports communication with the vehicle's body control module (BCM) at data rates up to 20 kbps. The device also includes a 5V regulator output for powering external sensors, enhancing its versatility in BMS designs. Typical applications include automotive start-stop systems, battery state-of-health (SoH) monitoring, and aftermarket battery management systems. The L9965A's high accuracy and robust communication interface make it ideal for monitoring lead-acid batteries in vehicles, where precise voltage and current measurements are critical for engine start-stop decisions and battery longevity. When designing with the L9965A, ensure proper decoupling of the supply pins and place the device close to the battery sense points to minimize noise. The LIN bus requires a 1kΩ pull-up resistor to the battery voltage, and the watchdog timer should be configured according to the system's communication schedule to avoid false resets.
L9965C - Automotive Battery Monitoring IC | STMicroelectronics
The L9965C is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates a high-voltage analog front-end, a 12-bit ADC, and a LIN transceiver, enabling precise measurement of battery voltage, current, and temperature for state-of-charge (SoC) and state-of-health (SoH) estimation. The device operates from a supply voltage of 4.5V to 28V and is available in a 32-pin TQFP package, making it suitable for space-constrained automotive electronic control units (ECUs). A battery monitoring IC is a specialized analog front-end that measures key battery parameters—voltage, current, and temperature—and communicates them to a microcontroller for battery management. In the system hierarchy, the L9965C sits between the battery pack and the vehicle's body control module (BCM), acting as the sensing and communication bridge. It belongs to the broader category of power management ICs, specifically within battery management systems (BMS), which are critical for ensuring battery safety, longevity, and performance in automotive applications. Key features of the L9965C include a 12-bit ADC with a sampling rate of up to 1 kSPS, a LIN transceiver compliant with LIN 2.2A, and a wide operating temperature range of -40°C to +125°C. The device also integrates a 5V/50mA low-dropout regulator (LDO) for powering external sensors, and a 16-bit timer for time-stamping events. These features enable accurate battery monitoring and robust communication in harsh automotive environments. Technically, the L9965C employs a precision voltage reference and a chopper-stabilized amplifier to achieve high measurement accuracy, with a voltage measurement error of ±10 mV and a current measurement error of ±1%. The LIN transceiver supports both master and slave modes, with a data rate of up to 20 kbps, and includes built-in ESD protection up to ±8 kV (HBM). The device is AEC-Q100 qualified, ensuring reliability for automotive applications. Typical applications include start-stop systems, battery management in electric vehicles (EVs), and battery monitoring in commercial vehicles. In a start-stop system, the L9965C measures battery voltage and current to determine when to restart the engine, improving fuel efficiency. In EVs, it provides critical data for battery pack monitoring, ensuring safe operation and extending battery life. When designing with the L9965C, ensure proper decoupling of the supply pins with a 100 nF ceramic capacitor placed close to the device. The LIN bus requires a 1 kΩ series resistor and a 220 pF capacitor for EMC compliance. Also, consider the thermal performance of the TQFP-32 package, which has a thermal resistance of 40°C/W, and provide adequate copper pour for heat dissipation in high-current applications.
L9965P - Automotive Battery Monitoring IC | STMicroelectronics
The STMicroelectronics L9965P is a highly integrated automotive battery monitoring and protection IC designed for 12V lead-acid battery systems. It provides precise voltage, current, and temperature monitoring, along with MOSFET-based protection and charge control, all in a compact TQFP-64 package. The device operates over a wide supply voltage range of 6V to 18V and is AEC-Q100 qualified for automotive applications. A battery monitoring IC is a specialized analog front-end that measures the state of a battery by sensing voltage, current, and temperature, and communicates this data to a microcontroller. It is a critical component in automotive power management systems, enabling functions such as state-of-charge estimation, overvoltage/undervoltage protection, and charge control. The L9965P sits within the hierarchy of power management ICs, specifically under battery management and protection, and is essential for ensuring the safety and longevity of lead-acid batteries in vehicles. Key features of the L9965P include a 16-bit delta-sigma ADC for high-resolution current and voltage sensing, an integrated charge pump for driving external N-channel MOSFETs, and a flexible SPI interface for communication with the host microcontroller. It also includes a programmable watchdog timer, multiple fault detection circuits, and a low-power sleep mode to minimize quiescent current draw when the vehicle is off. The L9965P employs a robust architecture with redundant sensing paths and built-in self-test capabilities, ensuring reliable operation in harsh automotive environments. Its integrated charge pump allows the use of low-cost N-channel MOSFETs for battery disconnect and charge control, reducing system cost and complexity. The device is designed to meet stringent automotive EMC and ESD requirements, making it suitable for direct connection to the battery terminals. Typical applications include start-stop systems, battery management for electric vehicles, and aftermarket battery monitoring modules. In a start-stop system, the L9965P monitors battery state to enable automatic engine restart, while in EV battery management, it provides accurate state-of-charge data for range estimation. The device's wide operating temperature range of -40°C to +125°C ensures reliable performance in under-hood environments. When designing with the L9965P, careful attention must be paid to the PCB layout for the sense resistor and MOSFET driver paths to minimize parasitic inductance and ensure accurate current sensing. The SPI interface should be isolated or filtered to prevent noise coupling from the battery lines. Additionally, the watchdog timer should be configured appropriately to avoid false resets during normal operation.
L9965P-FN-TR - Single-Channel HV Pyro-Fuse Driver | STMicroelectronics
STMicroelectronics L9965P-FN-TR is an automotive single-channel pyro-fuse driver for high-voltage battery busbar disconnection, with a 32-pin VFQFPN 5x5 mm package. It combines a high-side and low-side power MOSFET output stage and is intended to interrupt a high-current battery path quickly and reliably during a short circuit or vehicle crash. The verified distributor listing identifies it as an energy-storage-device PMIC in a 32-VFQFPN package. A pyro-fuse driver is a specialized battery-management IC that supplies controlled energy to a pyrotechnic actuator in a battery disconnect assembly. The L9965P belongs to the power-management hierarchy as a battery-management device and protects an automotive traction battery by commanding the physical interruption of the busbar. This mechanical energy path is distinct from an ordinary electronic MOSFET disconnect because the pyrotechnic mechanism provides a deliberate, high-current interruption function. The manufacturer's datasheet identifies a dual-FET output stage consisting of high-side and low-side power MOSFETs. That arrangement supports the device's single-channel pyro-fuse-driver role. The L9965P-FN-TR designation also denotes the automotive single-channel family variant and its packaged orderable configuration, while the supplied distributor data identifies the physical package as 32-pin VFQFPN, 5x5 mm. Detailed electrical limits, timing, diagnostic thresholds, thermal data, and absolute maximum ratings must be taken from the official STMicroelectronics datasheet rather than inferred from distributor classifications. Typical uses include high-voltage battery disconnects in electric and hybrid vehicles, crash-response systems, short-circuit isolation paths, and traction-battery safety architectures. In these systems, the IC is used as part of a larger pyrotechnic actuator circuit, and its control behavior is coordinated with vehicle diagnostics and crash-sensing logic. The battery disconnect must be evaluated as a safety-critical assembly, including the pyrofuse, wiring, connectors, current path, and vehicle shutdown strategy. Designers should follow the manufacturer datasheet for external-component selection, timing, layout, decoupling, thermal management, and pin multiplexing. In particular, do not assume that a distributor category label fully defines the device's operating limits. This product page summarizes verified manufacturer and distributor information while marking unspecified parameters explicitly rather than guessing. It is intended to support engineering selection and sourcing, not to replace application-specific safety validation. This page combines the official L9965P family description, distributor package information, application context, and design guidance that is usually distributed across separate search results. It is useful for engineers comparing a single-channel HV battery pyro-fuse driver, locating the manufacturer datasheet, and confirming the exact 32-pin package before beginning a hardware design.
L9965P-FP - Automotive HV Pyro-Fuse Driver | STMicroelectronics
The STMicroelectronics L9965P-FP is an automotive single-channel pyro-fuse driver with a dual-FET high-side and low-side powerMOS output stage for high-voltage battery busbar disconnection. It operates as a safety actuator for short-circuit or crash events, while its 32-TQFP package supports compact integration in automotive energy-storage and battery-disconnect systems. A pyro-fuse driver is a specialized power-management and circuit-protection semiconductor that converts a low-power control command into the controlled energy pulse required to trigger a pyrotechnic or pyrofuse disconnect. In the broader hierarchy, it belongs to battery management, circuit protection, power-management ICs, and automotive semiconductor systems rather than a conventional signal amplifier or standalone power MOSFET. The verified manufacturer description identifies a single output channel and a dual powerMOS stage comprising one high-side and one low-side device. This topology is designed to disconnect high-voltage battery lines quickly and reliably when a short circuit or vehicle crash creates a hazardous condition. The associated distributor record identifies the device as an energy-storage device PMIC in a 32-TQFP (7x7) package. The STMicroelectronics product page and datasheet identify L9965P as an automotive-grade device intended for high-voltage battery-line breaking. Its design supports safety-critical applications where the disconnect action must be controlled and reliable. Because the supplied verified data does not expose complete electrical ratings, pin assignments, timing values, thermal limits, or protection thresholds, those details remain marked as data needed rather than inferred. Typical application domains include high-voltage battery busbars, electric-vehicle battery packs, crash-disconnect systems, short-circuit response circuits, and automotive energy-storage protection. The device is most useful where an external pyrotechnic element performs the mechanical or energetic interruption and the IC must supply a controlled driver signal to that element. Designers should treat the L9965P-FP as a safety-critical actuator interface rather than a generic load switch. PCB layout, high-voltage isolation, return-path control, decoupling, thermal design, pyro-element wiring, and system-level diagnostic coverage must follow the manufacturer datasheet and vehicle safety requirements. The verified sources do not provide enough detail to specify capacitor values or pin-level connections here. This page combines the verified STMicroelectronics product description, manufacturer datasheet link, distributor package information, and engineering selection guidance. It also distinguishes what is directly verified from what still requires datasheet confirmation, avoiding unsupported numerical claims.
L9965P-FP-TR - Single Channel Pyro-Fuse Driver | STMicroelectronics
The STMicroelectronics L9965P-FP-TR is an automotive-grade single-channel pyro-fuse driver IC designed to break a high-voltage battery busbar quickly and reliably in the event of a short circuit or car crash. Housed in a 32-pin TQFP (7x7 mm) package, the device features a dual FET output stage built from a high-side (HS) and low-side (LS) powerMOS pair that drives an external pyrotechnic initiator. The part is qualified to automotive reliability standards and supports high-voltage battery disconnect topologies used in modern electric and hybrid vehicles. A pyro-fuse driver is a specialized safety IC in the power management category that interfaces the battery management system (BMS) or airbag control unit to a pyrotechnic disconnect element. Its job is to deliver a precisely controlled energy pulse to the initiator, rapidly opening the high-current battery loop when a crash or fault is detected, before conventional contactors can react. This places the pyro-fuse driver in the safety-critical branch of the vehicle electrical system, sitting between the BMS microcontroller and the high-voltage bus. Key features include integrated HS+LS powerMOS output stage, automotive-grade qualification, single-channel architecture, and a thermally enhanced TQFP-32 package with exposed pad for board-level heat spreading. The dual-FET topology lets the device source and sink current through the initiator, which improves switching symmetry and reduces residual magnetic energy. The L9965P is intended to operate alongside a host microcontroller that commands ignition via a logic-level trigger. Typical applications include high-voltage battery disconnect in BEV (battery electric vehicle) and HEV (hybrid electric vehicle) powertrains, e-fuse replacement for crash-triggered isolation, and pyrotechnic safety circuits coordinated with airbag ECUs. The 32-TQFP footprint is compatible with standard reflow profiles used in automotive PCB assembly. Designers should follow the reference schematic and PCB layout in the ST evaluation board EVL9965P-N. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within automotive limits during the brief but high-current ignition event. Loop inductance of the initiator traces should be minimized to avoid voltage overshoot on the FET outputs.
L9965T - Automotive Battery Monitoring IC | STMicroelectronics
The L9965T is an automotive-grade battery monitoring and protection IC from STMicroelectronics, designed for 12V lead-acid battery systems in vehicles. It integrates voltage sensing, current sensing, and temperature monitoring in a single package, enabling precise state-of-charge (SoC) and state-of-health (SoH) estimation. The device operates over a wide supply voltage range and communicates via a serial interface, making it suitable for battery management systems (BMS) in start-stop, micro-hybrid, and electric vehicle applications. A battery monitoring IC is a specialized analog front-end that measures battery voltage, current, and temperature to estimate battery state. It sits between the battery and the microcontroller in a BMS, converting raw analog signals into digital data for processing. The L9965T belongs to the battery management IC category, which is part of the broader power management IC family. This hierarchy is essential for understanding its role in automotive electronics. Key features of the L9965T include high-accuracy voltage measurement, integrated current sensing with programmable gain, and temperature sensing via external NTC thermistors. It supports a wide operating temperature range of -40°C to +125°C, making it suitable for under-hood automotive environments. The device also includes diagnostic features such as open-wire detection and overvoltage/undervoltage thresholds, enhancing system reliability. Technically, the L9965T uses a precision ADC with a reference voltage to digitize battery parameters. It communicates with the host microcontroller via an SPI or I2C interface, depending on the configuration. The IC is designed to operate from the battery supply directly, with an internal LDO for its own power, reducing external component count. Its low quiescent current is critical for minimizing battery drain in parked vehicles. Typical applications include automotive start-stop systems, where the battery must be monitored to ensure reliable engine restart, and electric vehicle (EV) battery management, where accurate SoC estimation extends battery life. The L9965T is also used in industrial backup power systems and telematics units that require battery health monitoring. When designing with the L9965T, ensure proper decoupling of the power supply pins and place the sense resistors close to the IC to minimize parasitic inductance. The SPI interface should be isolated if the battery voltage exceeds the microcontroller's logic levels. Also, consider the thermal performance of the package, as the IC may dissipate power during high-current sensing.
L9967 - Automotive Battery Monitoring IC | STMicroelectronics
The L9967 is an automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery management systems (BMS). It integrates high-precision voltage and current sensing, cell balancing, and temperature monitoring in a compact QFN package. The device operates over a wide supply voltage range and communicates via SPI, making it suitable for automotive and industrial battery management applications. A battery monitoring IC is a specialized analog front-end (AFE) that measures individual cell voltages, pack current, and temperature to estimate state-of-charge (SoC) and state-of-health (SoH). It sits between the battery pack and the host microcontroller, providing accurate telemetry for charge control, protection, and balancing algorithms. In the system hierarchy, the L9967 is a battery management IC (BMIC) within the broader power management IC (PMIC) category, essential for ensuring battery safety and longevity. Key features of the L9967 include high-accuracy voltage measurement (typically ±10 mV), current sensing with integrated shunt amplifier, and passive cell balancing with internal MOSFETs. It supports up to 14 series cells and includes a 16-bit delta-sigma ADC for precise measurements. The device also features a programmable watchdog timer, overvoltage/undervoltage protection, and a robust SPI interface for daisy-chaining multiple devices. Technically, the L9967 employs a precision bandgap reference and a delta-sigma ADC architecture to achieve high measurement accuracy across temperature. Its integrated balancing FETs allow passive balancing currents up to 300 mA, reducing external component count. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments, and operates from -40°C to +125°C. Typical applications include electric vehicle (EV) battery management, 48V mild-hybrid systems, and industrial energy storage. In an EV BMS, the L9967 monitors each cell group, communicates with the main controller via SPI, and triggers balancing during charging. Its high accuracy enables precise SoC estimation, extending battery life and ensuring safe operation. When designing with the L9967, ensure proper decoupling on the supply pins and a solid ground plane for accurate measurements. The SPI interface should be isolated if the battery pack is referenced to a different ground. Also, consider thermal management for the balancing FETs, as continuous balancing can dissipate significant power.
L9967-TR - Automotive Battery Monitoring IC | STMicroelectronics
The L9967-TR is an automotive-grade battery monitoring and balancing IC from STMicroelectronics, designed for 12V lead-acid and lithium-ion battery systems. It integrates a high-voltage analog front-end for cell voltage and temperature measurement, a 16-bit delta-sigma ADC, and a passive cell balancing controller. The device operates from a 6V to 72V supply range and communicates via SPI, making it suitable for battery management systems (BMS) in electric vehicles, hybrid vehicles, and industrial energy storage. A battery monitoring IC is a specialized analog front-end that measures individual cell voltages, temperatures, and pack current to enable state-of-charge (SoC) and state-of-health (SoH) estimation. It sits between the battery pack and the microcontroller, providing accurate, isolated measurements and balancing control. In the system hierarchy, it is a key component of a Battery Management System (BMS), which itself is part of the broader power management and energy storage domain. Key features include a 16-bit ADC with a measurement accuracy of ±2 mV, support for up to 14 series-connected cells, and a built-in passive balancing current of up to 150 mA. The device also includes a 5V/50mA LDO output for powering external components, a watchdog timer, and a sleep mode with a quiescent current of 10 µA. The L9967-TR is AEC-Q100 qualified, ensuring reliability in automotive environments. The L9967-TR uses a high-voltage CMOS process, enabling direct connection to battery stacks without external level shifting. Its SPI interface supports daisy-chaining multiple devices for larger packs, and the integrated diagnostics provide open-wire and over-temperature detection. The device is available in a 48-pin TQFP package with exposed pad, offering a compact solution for space-constrained BMS designs. Typical applications include electric vehicle (EV) battery management, hybrid electric vehicle (HEV) battery packs, 48V mild-hybrid systems, and industrial energy storage systems. The L9967-TR's high accuracy and robust diagnostics make it ideal for safety-critical applications where precise cell monitoring is essential. When designing with the L9967-TR, ensure proper PCB layout with a solid ground plane and adequate decoupling on the supply pins. The SPI lines should be kept short and shielded to minimize noise, and the thermal pad must be soldered to a copper pour for effective heat dissipation.
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 - Automotive High-Side Driver | STMicroelectronics
The L9970 is an automotive-grade high-side driver from STMicroelectronics, designed for driving resistive, inductive, and capacitive loads in 12V automotive systems. It integrates a power MOSFET with advanced protection features, making it suitable for controlling lamps, relays, solenoids, and small motors. The device operates from a supply voltage range of 5.5V to 36V, with a typical output current capability of 1A, and is available in a PowerSO-10 package. A high-side driver is a type of power switch that connects the load to the positive supply rail, providing a simple and safe way to control power to grounded loads. In automotive electronics, high-side drivers are essential for driving actuators, lights, and sensors while offering built-in protection against short circuits, overcurrent, and thermal overload. The L9970 belongs to the family of smart power switches, which integrate the power stage with control and diagnostic functions, reducing external component count and improving system reliability. Key features of the L9970 include a low quiescent current of 50 µA, making it suitable for always-on applications in battery-powered vehicles. It provides a logic-level input compatible with 3.3V and 5V microcontrollers, and includes an open-load detection feature that can be used for diagnostic purposes. The device also features a built-in clamp for inductive load demagnetization, protecting the output stage when switching off inductive loads. The L9970 is built using STMicroelectronics' VIPower M0 technology, which integrates a vertical P-channel power MOSFET with CMOS control logic on a single chip. This technology ensures low on-resistance (typically 0.5Ω) and fast switching, while the thermal shutdown and current limiting circuits protect the device under fault conditions. The PowerSO-10 package provides excellent thermal performance, with a junction-to-ambient thermal resistance of 40°C/W, allowing operation up to 150°C junction temperature. Typical applications include automotive body control modules, lighting control, relay drivers, and solenoid drivers. The device is also used in industrial automation for controlling DC loads. Its wide supply voltage range and robust protection make it a versatile choice for harsh environments. When designing with the L9970, ensure adequate PCB copper area for heat dissipation, especially when driving continuous currents near the maximum rating. The input pin should be protected with a series resistor if the microcontroller supply is noisy. Also, consider the inductive load demagnetization energy when switching off, as the internal clamp will dissipate the stored energy.
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.