Introduction

The L9369-TR chip is the core chip of the electronic stability system (the standard name should be called ESC, and ESP is a Bosch patent, collectively referred to as "ESP" in the text).

ESP stands for Electronic Stabilization System, which is an essential part of high-end cars, especially SUVs. Its main function is to detect and reduce the loss of traction to prevent skidding. There are seven main ESP suppliers in the world, namely Aisin under Toyota, Hitachi exclusively for Nissan, Nissin exclusively for Honda, and Mando for Korean models. The other three companies are Bosch, Continental, and ZF. Bosch occupies about 70% of the Chinese automotive ESP system market share.

Catalog

ⅠL9369-TR Description

The L9369 targets the specific application of electric parking braking, suitable for system configuration in cable-puller or Motor Gear Unit (MGU).

The cores are two H-bridge driver stages to drive 8 external FETs for the rear wheel brakes actuators. The stages are fully driven and configurable via SPI, also in PWM control mode, and protected against overcurrent, with drain-source and gate-source voltages monitoring.

A synchronized motor voltages and currents acquisition is performed via full differential amplifiers with programmable and precise gain and low offset and 10 ADC sigma-delta modulators.

Two configurable HS/LS stages are present with programmable output voltage to drive LED arrays, with feedforward regulation.

2 Motor Speed Sensor interfaces (MSS) are available to acquire position feedback from brake actuators (shared with the Lamp driver stage and GPIO).

The set of interfaces is completed by 4 GPIO (General Purpose I/O) pins and a button interface allows management of specific customer requirements from the Electronic Parking braking (EPB) button console both in Normal and Sleep Mode.

ⅡL9369-TR Pinout

Figure1-L9369-TR Pinout

ⅢL9369-TR CAD Model

L9369-TR symbol

Figure2-L9369-TR symbol

L9369-TR footprint

Figure3-L9369-TR footprint

L9369-TR 3D Model

Figure4-L9369-TR 3D Model

ⅣL9369-TR Specifications

ⅤL9369-TR Features

• AEC-Q100 qualified
• Functional safety concept for ISO26262 compliance
• 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, very 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
• A full drive of external power NFETs down to 5.5 V battery input voltage
• Monitoring of the 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 feedback via external Hall sensors.
• System wakeup in Sleep Mode
• Watchdog (configurable via SPI)

 ⅥIC L9369-TR Application

The L9369-TR is a low-voltage motor controller chip produced by STMicroelectronics. It is a single-chip solution that can be used to control brushless DC motors and stepper motors. The chip has a variety of features and functions, including various protection and diagnostic functions, such as over-current, under-voltage, and over-temperature protection, and PWM control of load current up to 2.5A.

Following are some applications of L9369-TR:

• Robot: The L9369-TR controls the robot joints, as well as the motion and position of the robot.

• Automatic door: control the opening and closing and speed of the door.

• Power Tools: Control the speed and direction of the tool.

• Automotive Applications: The L9369-TR can be used for the control of power seats, power windows, and sunroofs in automotive applications.

• Home Appliances: The L9369-TR can be applied to control electric tools, washing machines, and fans in home appliances.

• In summary, the L9369-TR is a versatile motor controller chip that can be used in a variety of applications, especially those that need to control low-voltage motors.

Ⅶ How does L9369-TR Work in an Automotive System?

The L9369-TR is a low-voltage motor controller chip that works in applications such as power seats, power windows, and sunroof controls in automobiles.

Specifically, in automobiles, the L9369-TR is often used with other electronic components such as electric motors and sensors. By receiving the feedback signal from the sensor, L9369-TR can carry out precise control on the electric motor, so that it has better performance and higher safety performance during driving.

For example, in the control system of electric seats, L9369-TR can control the speed and direction of the seat motor, so that the seat can move forward or backward, and adjust the height and angle. At the same time, L9369-TR can also monitor the working status of the electric seat motor to ensure its safety performance.

In short, the L9369-TR realizes the operation and control of the car by controlling other electronic components such as motors and sensors.

Figure5-EPB

 ⅧIC L9369-TR PDF

 IC L9369-TR Datasheet