Overview
The L9369-TR, produced by STMicroelectronics, is an automotive integrated circuit (IC) specifically designed for electric parking braking systems. It is suitable for system configurations in either cable-puller or Motor Gear Unit (MGU) setups. The IC features two H-bridge driver stages that drive 8 external FETs for the rear wheels' brake actuators. These stages are fully configurable via SPI and support PWM control mode, along with overcurrent protection and monitoring of drain-source and gate-source voltages.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | LQFP64 (10x10x1.4 mm) | |
| Operating Temperature | -40°C to 175°C | |
| Supply Voltage | Down to 5.5 V battery input voltage | |
| SPI Interface | 32-bits, 10 MHz with CRC | |
| ADC Channels | 10 separate ADC channels for motor current and voltage measurement | |
| Differential Amplifiers | 10 integrated fully differential amplifiers with low offset and precise gain | |
| GPIO | 4 General Purpose I/O stages | |
| Motor Speed Sensors | 2 Motor Speed Sensor interfaces (MSS) | |
| Button Interface | 9 configurable I/O pins for monitoring and diagnostics | |
| Compliance | AEC-Q100 qualified, ISO26262 compliance |
Key Features
- AEC-Q100 qualified and compliant with ISO26262 functional safety concept.
- 4 High-side and Low-side gate pre-drivers for 8 external power NFETs.
- Overcurrent protection with programmable thresholds.
- Programmable and NFET independent thresholds for VDS monitoring.
- 10 integrated fully differential amplifiers with low offset, precise gain, and self-test.
- 10 separate ADC channels for digital processing of motor current and voltage measurement.
- 32-bits, 10 MHz SPI with CRC for internal setting, self-test, and diagnostics.
- Full drive of external power NFETs down to 5.5 V battery input voltage.
- Monitoring on Main power supply and continuous BIST for internal regulators.
- Double Bandgap reference.
- 4 General Purpose I/O stages (GPIO).
- Button Interface (9 configurable I/O pins) for monitoring and diagnostics in Normal and Sleep Mode.
- 2 Motor Speed Sensors (MSS) interfaces to acquire speed information feedbacks via external Hall sensors.
- System wake-up in Sleep Mode and configurable Watchdog via SPI.
Applications
The L9369-TR is specifically designed for electric parking braking systems in automotive applications. It is suitable for use in cable-puller or Motor Gear Unit (MGU) configurations, making it an essential component for modern vehicle safety systems.
Q & A
- What is the primary application of the L9369-TR IC?
The L9369-TR is primarily used for electric parking braking systems in automotive applications.
- What type of package does the L9369-TR come in?
The L9369-TR comes in an LQFP64 (10x10x1.4 mm) package.
- What is the operating temperature range of the L9369-TR?
The operating temperature range is from -40°C to 175°C.
- Does the L9369-TR support SPI communication?
Yes, it supports a 32-bits, 10 MHz SPI interface with CRC.
- How many ADC channels does the L9369-TR have?
The L9369-TR has 10 separate ADC channels for motor current and voltage measurement.
- What safety features does the L9369-TR include?
The L9369-TR includes overcurrent protection, programmable VDS monitoring, and compliance with ISO26262 functional safety concept.
- Can the L9369-TR drive external power NFETs at low battery voltages?
Yes, it can drive external power NFETs down to 5.5 V battery input voltage.
- Does the L9369-TR have any GPIO stages?
Yes, it has 4 General Purpose I/O stages (GPIO).
- How does the L9369-TR handle motor speed sensing?
The L9369-TR has 2 Motor Speed Sensor interfaces (MSS) to acquire speed information feedbacks via external Hall sensors.
- Is the L9369-TR AEC-Q100 qualified?
Yes, the L9369-TR is AEC-Q100 qualified.
