L9369-TR - Automotive H-Bridge Driver for Electric Parking Brake | STMicroelectronics
MPN: L9369-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.05 | $6.05 |
| 10 | $5.45 | $54.50 |
| 100 | $4.84 | $484.00 |
| 500 | $4.36 | $2,180.00 |
| 1,000 | $3.88 | $3,880.00 |
L9369-TR Overview
An H-bridge driver is a power management IC that controls the direction and speed of a DC motor by selectively turning on four transistors in an H-shaped configuration. It is a type of motor driver, which falls under the broader category of power management ICs. The L9369-TR is specifically designed for automotive applications, meeting the stringent AEC-Q100 qualification standard for reliability in harsh environments.
Key features of the L9369-TR include a low RDS(on) of 0.15 ohm per switch, which minimizes power dissipation and improves efficiency. It also features a built-in current sense amplifier for precise motor current monitoring, and a SPI interface for advanced diagnostics and control. The device includes comprehensive protection features such as overcurrent, overtemperature, and undervoltage lockout, ensuring robust operation in automotive systems.
The L9369-TR utilizes a smart power technology that integrates the power stage with control logic and protection circuits on a single die. This integration reduces external component count and improves system reliability. The SPI interface allows for real-time monitoring of fault conditions and precise control of the motor, making it suitable for advanced driver assistance systems (ADAS) and body control modules.
Typical applications include electric parking brakes, electric power steering (EPS), electronic stability control (ESC), and active suspension systems. The device is also used in HVAC blower motors, cooling fan control, and window lift modules. Its high current capability and robust protection make it ideal for driving brushed DC motors in automotive environments.
When designing with the L9369-TR, it is essential to ensure proper PCB layout with adequate copper area for heat dissipation. The 64-LQFP package has a thermal resistance of 25 C/W, so a heatsink or large copper pour is recommended for continuous high-current operation. Additionally, the SPI interface should be configured correctly to enable fault reporting and diagnostic functions.
Drop-in alternatives for L9369-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with L9369-TR (same form factor and footprint) — differing in Package, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
L9369
✅ Drop-In✓ In Stock
$2.88 / Unit
View Datasheet →L9369-TR Maximum Ratings & Electrical Characteristics
| Function | Automotive IC for electric parking braking |
| Number of H-Bridge Drivers | 2 |
| External FETs Driven | 8 |
| Supply Voltage Range | 5.5 V to 28 V |
| Peak Output Current per H-Bridge | 8.5 A |
| RDS(on) per Switch | 0.15 ohm |
| Interface | SPI |
| Current Sense Amplifier | Built-in |
| Protection Features | Overcurrent, overtemperature, undervoltage lockout |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Thermal Resistance (theta_JA) | 25 C/W |
| Qualification | AEC-Q100 |
| RoHS Status | Compliant |
L9369-TR Pin Configuration
| Pin 1 | VCC — Power supply input |
| Pin 2 | GND — Ground |
| Pin 3 | SPI_CS — SPI chip select |
| Pin 4 | SPI_CLK — SPI clock |
| Pin 5 | SPI_MOSI — SPI master out slave in |
| Pin 6 | SPI_MISO — SPI master in slave out |
| Pin 7 | H1_OUT1 — H-bridge 1 output 1 |
| Pin 8 | H1_OUT2 — H-bridge 1 output 2 |
| Pin 9 | H2_OUT1 — H-bridge 2 output 1 |
| Pin 10 | H2_OUT2 — H-bridge 2 output 2 |
| Pin 11 | CSENSE1 — Current sense amplifier 1 output |
| Pin 12 | CSENSE2 — Current sense amplifier 2 output |
Typical Applications
L9369-TR is suitable for 6 applications: Electric Parking Brake (EPB), Electric Power Steering (EPS), Electronic Stability Control (ESC), Active Suspension Systems, HVAC Blower Motors, Cooling Fan Control.
Electric Parking Brake (EPB)
The L9369-TR is specifically designed for electric parking braking systems, suitable for cable-puller or Motor Gear Unit (MGU) configurations. It drives two H-bridge stages to control 8 external FETs for rear wheel brake actuators. The high peak output current of 8.5 A per H-bridge provides the necessary torque for clamping and releasing brake pads. The SPI interface enables precise control and diagnostics, ensuring reliable operation in safety-critical braking systems. The AEC-Q100 qualification guarantees performance in harsh automotive environments, including temperature extremes and vibration. The device's robust protection features, such as overcurrent and overtemperature shutdown, prevent damage during fault conditions, enhancing system safety and reliability.
Recommended
Electric Power Steering (EPS)
The L9369-TR is suitable for electric power steering systems, where precise motor control and high reliability are essential. The device's two H-bridge stages can drive the EPS motor with high current (8.5 A peak per H-bridge), providing the necessary torque assistance. The SPI interface allows for real-time monitoring of motor current and fault conditions, enabling advanced control algorithms. The low RDS(on) of 0.15 ohm minimizes power dissipation, improving system efficiency and reducing heat generation. The AEC-Q100 qualification ensures reliable operation in the demanding automotive environment, including temperature extremes and electrical stress. The device's protection features, such as overcurrent and overtemperature shutdown, protect the motor and the IC from damage, enhancing system safety.
Recommended
Electronic Stability Control (ESC)
The L9369-TR can be used in electronic stability control systems, where precise and rapid motor control is required. The device's two H-bridge stages can drive the ESC pump motor with high current, enabling quick brake pressure modulation. The SPI interface provides real-time diagnostics, allowing the ESC controller to monitor system health and respond to faults. The low RDS(on) of 0.15 ohm ensures efficient operation, reducing power loss and heat generation. The AEC-Q100 qualification guarantees reliability in the harsh automotive environment, including vibration and temperature extremes. The device's protection features, such as overcurrent and undervoltage lockout, prevent damage during fault conditions, ensuring system safety and reliability.
Recommended
Active Suspension Systems
The L9369-TR is suitable for active suspension systems, where precise control of actuators is required to adjust damping and ride height. The device's two H-bridge stages can drive the suspension actuators with high current, enabling rapid response to road conditions. The SPI interface allows for real-time monitoring and control, enabling advanced suspension algorithms. The low RDS(on) of 0.15 ohm minimizes power dissipation, improving system efficiency. The AEC-Q100 qualification ensures reliable operation in the demanding automotive environment. The device's protection features, such as overcurrent and overtemperature shutdown, protect the actuators and the IC from damage, enhancing system safety and reliability.
Recommended
HVAC Blower Motors
The L9369-TR can be used to drive HVAC blower motors in automotive climate control systems. The device's two H-bridge stages can control the blower motor with high current, enabling variable speed control. The SPI interface allows for precise speed regulation and diagnostics, improving passenger comfort. The low RDS(on) of 0.15 ohm ensures efficient operation, reducing power loss and heat generation. The AEC-Q100 qualification guarantees reliability in the automotive environment. The device's protection features, such as overcurrent and overtemperature shutdown, protect the motor and the IC from damage, ensuring long-term reliability.
Recommended
Cooling Fan Control
The L9369-TR is suitable for driving cooling fans in automotive engine and battery cooling systems. The device's two H-bridge stages can control the fan motor with high current, enabling efficient thermal management. The SPI interface allows for precise speed control and diagnostics, optimizing cooling performance. The low RDS(on) of 0.15 ohm minimizes power dissipation, improving system efficiency. The AEC-Q100 qualification ensures reliable operation in the harsh automotive environment. The device's protection features, such as overcurrent and overtemperature shutdown, protect the fan motor and the IC from damage, ensuring reliable operation.
Recommended
Recommended Products Summary
Engineering reference data for L9369-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9369 | DRV8701-Q1 | TLE9201SG |
|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | HTSSOP-24 - different | PG-SSOP-24 - different |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments | Infineon |
| Number of H-Bridge Drivers | 2 | 2 | 1 | 1 |
| Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Dual H-bridge driver for EPB applications (vs DRV8701-Q1)
- High peak output current of 8.5 A per H-bridge (vs TLE9201SG)
- AEC-Q100 qualified for automotive applications (vs DRV8701-Q1)
Design Notes
The L9369-TR in the 64-LQFP package has a thermal resistance of 25 C/W. For continuous high-current operation, ensure adequate copper area on the PCB for heat dissipation. A large ground plane and thermal vias are recommended to keep the junction temperature within safe limits. For example, at 8.5 A peak current with an RDS(on) of 0.15 ohm, power dissipation per switch is approximately 10.8 W, requiring substantial thermal management.
Place the L9369-TR close to the motor connectors to minimize trace inductance and resistance. Use wide, short traces for high-current paths (H-bridge outputs) to reduce voltage drops and heat generation. Decouple the VCC pin with a 100 nF ceramic capacitor and a 10 uF electrolytic capacitor near the IC. Ensure the SPI lines are routed away from high-current traces to avoid noise coupling.
Do not exceed the absolute maximum supply voltage of 28 V. Ensure the SPI interface is properly configured to enable fault reporting and diagnostic functions. The current sense amplifier outputs should be connected to the ADC inputs of the microcontroller with appropriate filtering to avoid noise. Verify the external FETs are properly sized for the peak current and have adequate gate drive voltage.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive applications.
