Introduction: As automotive intelligence and safety standards continue to rise, electronic parking brake (EPB) systems have become standard equipment in mid- to high-end vehicle models. As a key component of this core safety feature, STMicroelectronics’ L9369-TR is an automotive-grade integrated circuit designed specifically for electric parking brake applications. As a core chip supplied by Shenzhen Mingjiada Electronics, this article will provide a detailed overview of the L9369-TR’s technical features, key advantages, and typical application scenarios in the automotive electronics sector.
Product Overview
The L9369-TR is a highly integrated automotive IC launched by STMicroelectronics specifically for electric parking brake (EPB) applications. Suitable for both cable-operated and motor-gear unit (MGU) brake system configurations, its core architecture includes two H-bridge driver stages capable of driving up to eight external power NFETs, thereby enabling precise control of the rear-wheel brake actuators.
As a core component supplied by Mingjiada Electronics’ Shenzhen supply chain, the L9369-TR not only complies with AEC-Q100 automotive-grade certification but also incorporates design principles aligned with the ISO 26262 functional safety standard, ensuring stable and reliable brake control in harsh automotive environments.
Key Technical Advantages and Specifications
1. Robust Drive and Diagnostic Capabilities
The L9369-TR integrates four high-side and low-side gate pre-drivers, supports full configuration via SPI, and features a PWM control mode. Its built-in overcurrent protection (with programmable thresholds) and VDS monitoring function enable real-time monitoring of external FET status, preventing system damage caused by abnormal currents.
2. High-Precision Analog and Digital Processing
The chip integrates 10 fully differential amplifiers (with low offset and high-precision gain) and 10 independent Σ-Δ ADC channels for synchronous acquisition of motor voltage and current data, enabling high-precision digital processing. This is critical for EPB systems that require precise control of clamping force.
3. Extensive Interfaces and Functional Safety
SPI Communication: A 32-bit, 10 MHz SPI interface with CRC checksum is provided for internal configuration, self-test, and diagnostics.
Functional Safety: Features dual-bandgap reference voltage sources, main power supply monitoring, continuous BIST (built-in self-test) for the internal regulator, and a configurable watchdog to ensure the system complies with ISO 26262 ASIL-D requirements.
Low-Voltage Drive: Capable of fully driving external power NFETs even when the battery input voltage is as low as 5.5 V.
4. Wide Temperature Range and Package
Housed in an LQFP-64 package, it supports an extreme operating temperature range of -40°C to 175°C, making it ideally suited for high-temperature environments near the engine compartment.
Key Specifications
Product Model: L9369-TR
Core Function: Dual-channel H-bridge pre-driver specifically designed for Electric Parking Brakes (EPB)
Operating Temperature: -40°C to 175°C
Automotive Certification: AEC-Q100
Package Type: LQFP-64 (10x10x1.4 mm)
Supply Voltage Range: As low as 5.5V
Key Application Scenarios
The L9369-TR is primarily targeted at the following high-growth automotive electronics sectors:
Electronic Parking Brake (EPB) Systems: This is the L9369-TR’s core application. Whether in traditional cable-operated EPB systems or new motor-gear unit (MGU)-integrated calipers, the L9369-TR provides precise motor control to enable parking, release, and dynamic braking functions.
Electronic Stability Control (ESC/ESP): As part of the vehicle stability control system, the L9369-TR can be used in auxiliary braking modules. When wheel slip or understeer is detected, it works in conjunction with the hydraulic control unit to intervene rapidly, enhancing the vehicle’s dynamic safety.
Advanced Driver Assistance Systems (ADAS) and Autonomous Driving: In Level 3 and higher autonomous driving systems, redundant braking is a mandatory requirement. The L9369-TR’s high functional safety rating makes it an ideal choice as a backup actuator for brake-by-wire systems.
Other Motor Control Applications: With its dual H-bridge architecture, the L9369-TR can also be used in automotive applications requiring highly reliable DC motor drives, such as power tailgates, power windows, and seat adjustments.
Why Choose Mingjiada Electronics?
As a professional electronics component supplier based in Shenzhen, Mingjiada Electronics is committed to providing automotive electronics customers with genuine, cost-effective supply chain solutions. For the L9369-TR chip, we offer:
Stable Supply: Direct from the manufacturer, ensuring fresh batches and reliable quality.
Fast Delivery: Based in Shenzhen and supported by a robust warehousing and logistics system, we meet customers’ urgent production needs.
Conclusion
With its high integration, exceptional functional safety features, and wide operating range, the L9369-TR has become the chip of choice in modern electric parking brake (EPB) and electronic stability system designs. As a professional supplier in the Shenzhen area, Mingjiada Electronics is committed to providing you with the highest-quality L9369-TR material support to jointly advance the development of automotive safety technology.
For purchasing or price inquiries, please contact Mingjiada Electronics’ Shenzhen headquarters to obtain the latest inventory and pricing information for the L9369-TR.
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