ST L9960汽车ETC H桥解决方案

ST公司的L9960是用于汽车电子节流控制激励器(ETC)或废气再循环控制阀((EGR)的电阻或电感负载的集成H桥,包括飞轮二极管.在飞轮状态条件,只有并行二极管的低边才开关,从而降低功耗,其集成的串行外设接口(SPI)可调整器件参数,从而控制所有工作模式和读出诊断信息.满足汽车AEC-Q100规范,电池工作电压4.5 V到28 V,VDD5工作电压4.5 V到5.5 V,输入开关频率高达20kHz.本文介绍了L9960主要特性,框图和应用框图,以及评估板EVAL-L9960/L9960T主要特性,电路图和PCB设计图.
The device is an integrated H-Bridge for resistiveand inductive loads for automotive applications,such as throttle control actuators or exhaust gasrecirculation control valves.The driving strategy is enhanced by configurablePWM / DIR pins and IN1/IN2.
The H-Bridge contains integrated free-wheeldiodes. In case of freewheeling condition, thelow-side only is switched on in parallel of its diodeto reduce power dissipation.
The integrated Serial Peripheral Interface (SPI)makes it possible to adjust device parameters, tocontrol all operating modes and read outdiagnostic information.
L9960主要特性:
 AEC-Q100 qualified
 Flexible driving strategy via configurable pinsPWM/DIR (IN1/IN2)
 RDSon< 400 mΩ (full path at Tj =150℃ )
 Operating battery supply voltage from 4.5 V upto 28 V
 Operating VDD5 supply voltage from 4.5 V to5.5 V
 Input switching frequency up to 20 kHz
 Built in charge pump supporting 100% dutycycle
 Logic levels compatible to 3.3 V and 5 V
 Monitoring of VDD5 supply voltage withbidirectional switch-off pin
 Current limitation SPI-adjustable in four steps.
 Output stage current limitation withdependence on temperature
 2 Programmable voltage and current slew ratecontrol
 Short circuit and programmable thermalwarning and shutdown thresholds
 Open Load diagnosis in ON condition
 All I/O pins can withstand up to 19 V
 SPI interface for c...