Especificaciones
Fabricante: STMicroelectronics
Device Type: Automotive dedicated system-on-chip IC exclusively developed for vehicle Electric Parking Brake (EPB) systems, tape-and-reel surface mount packaged
Especificaciones eléctricas básicas
Vehicle battery operating voltage range: 5.5 V ~ 18 V, tolerates transient automotive load dump voltage fluctuations
Logic communication interface: 32-bit SPI bus with CRC error checking, maximum clock speed 10 MHz
Operating temperature range: -40 ℃ ~ +175 ℃
Automotive qualification: AEC-Q100 Grade 1
Functional safety design compliant with ISO 26262 standard
Package outline: 64-pin LQFP exposed pad package, dimensions 10 mm × 10 mm × 1.4 mm
Core Hardware Architecture & Key Features
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Dual independent H-bridge gate pre-driver unit
Built with 4 groups of high-side and low-side driver circuits, used to drive 8 external N-channel power MOSFETs, forming two complete H-bridge loops to control left and right rear wheel EPB actuators respectively. Supports PWM continuous chopping control for motor forward/reverse rotation, clamping force adjustment and holding torque maintenance. Each channel integrates programmable overcurrent threshold protection, drain-source voltage and gate-source voltage real-time monitoring to avoid power tube breakdown.
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High-precision motor signal acquisition subsystem
10-channel fully differential low-offset programmable gain amplifiers matched with Sigma-Delta ADC modulators, synchronously sampling motor working current, terminal voltage and actuator state signals. Dual bandgap voltage reference ensures measurement precision under wide temperature variation. Embedded built-in self-test (BIST) logic to regularly calibrate internal acquisition circuits automatically.
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Auxiliary driving and human-machine interaction interfaces
Two configurable high/low side output channels with closed-loop voltage regulation, dedicated for driving vehicle EPB indicator LED arrays;
2 sets of motor speed sensor (MSS) interfaces, connecting Hall sensors to collect actuator rotation speed and position feedback signals;
4-way general-purpose GPIO ports plus dedicated EPB physical button detection circuit, capable of button signal wake-up from sleep standby mode.
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Comprehensive safety and reliability protection
Internal power supply undervoltage lockout, chip overtemperature shutdown, short-circuit fault diagnosis and open-load detection functions;
Configurable hardware watchdog timer for system operation monitoring;
Multiple low-power sleep modes to reduce vehicle quiescent power consumption during parking;
All pins have robust ESD and surge resistance to adapt to complex automotive electrical environments.
Escenarios típicos de aplicación
Passenger car electronic parking brake controller modules
Rear wheel brake actuator dual-motor drive and closed-loop control units
EPB system signal collection, fault diagnosis and on-board communication nodes
Light commercial vehicle integrated parking brake electronic control systems
