Teknik Özellikler
Üretici: STMicroelectronics
Device Type: Automotive dedicated system-on-chip IC exclusively developed for vehicle Electric Parking Brake (EPB) systems, tape-and-reel surface mount packaged
Temel Elektriksel Özellikler
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.
Tipik Uygulama Senaryoları
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
