Overview
The L9369, produced by STMicroelectronics, is an automotive IC specifically designed for electric parking braking applications. It is suitable for system configurations in cable-puller or Motor Gear Unit (MGU) setups. This chip is a single-chip solution that integrates multiple functionalities to control and monitor the electric parking brake system efficiently.
The L9369 is AEC-Q100 qualified and complies with the functional safety concept for ISO26262, ensuring high reliability and safety in automotive applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | LQFP64 (10x10x1.4 mm) | |
| Operating Temperature | -40°C to 175°C | |
| Supply Voltage | Down to 5.5 V battery input voltage | |
| Gate Drivers | 4 High-side and Low-side gate pre-drivers for 8 external power NFETs | |
| Protection Features | Overcurrent protection with programmable thresholds, VDS monitoring | |
| ADC Channels | 10 separate ADC channels for digital processing of motor current and voltage measurement | |
| SPI Interface | 32-bits - 10 MHz SPI with CRC for internal setting, self-test, and diagnostics | |
| GPIO | 4 General Purpose I/O stages (GPIO) | |
| Motor Speed Sensors | 2 Motor Speed Sensor interfaces (MSS) to acquire speed information feedbacks via external Hall sensors | |
| Button Interface | Button Interface (9 configurable I/O pins) for monitoring and diagnostics in Normal and Sleep Mode |
Key Features
- AEC-Q100 qualified and compliant with ISO26262 functional safety concept
- Two H-bridge driver stages to drive 8 external FETs for rear wheel brakes actuators, fully driven and configurable via SPI and PWM control mode
- Overcurrent protection with programmable thresholds and VDS monitoring
- 10 integrated fully differential amplifiers with low offset, precise gain, and self-test, along with 10 ADC sigma-delta modulators
- 32-bits - 10 MHz SPI interface with CRC for internal settings, 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) and a button interface for monitoring and diagnostics
- 2 Motor Speed Sensor interfaces (MSS) 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 primarily used in electric parking braking systems in automotive applications. It is suitable for configurations in cable-puller or Motor Gear Unit (MGU) setups.
Beyond electric parking braking, this chip can also be utilized in other automotive applications such as power seats, power windows, and sunroof controls. It integrates with other electronic components like electric motors and sensors to provide precise control and monitoring.
Q & A
- What is the primary application of the L9369-TR?
The L9369-TR is primarily used for electric parking braking in automotive systems.
- What are the key features of the L9369-TR?
The L9369-TR includes features such as two H-bridge driver stages, overcurrent protection, 10 integrated fully differential amplifiers, 10 ADC channels, and a 32-bits SPI interface.
- Is the L9369-TR compliant with any automotive safety standards?
Yes, the L9369-TR is AEC-Q100 qualified and complies with the functional safety concept for ISO26262.
- 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 -40°C to 175°C.
- How does the L9369-TR communicate with other components?
The L9369-TR communicates via a 32-bits - 10 MHz SPI interface with CRC for internal settings, self-test, and diagnostics.
- What protection features does the L9369-TR have?
The L9369-TR includes overcurrent protection with programmable thresholds and VDS monitoring.
- Can the L9369-TR be used in sleep mode?
Yes, the L9369-TR supports system wake-up in Sleep Mode and has a configurable watchdog via SPI.
- What other applications can the L9369-TR be used in besides electric parking braking?
Besides electric parking braking, the L9369-TR can be used in applications such as power seats, power windows, and sunroof controls.
- How does the L9369-TR monitor motor voltages and currents?
The L9369-TR performs synchronized motor voltages and currents acquisition via full differential amplifiers with programmable and precise gain and 10 ADC sigma-delta modulators.
