[原创] TI LM5170－Q1汽车48V和12V多相双向电流控制方案

摘要:TI公司的LM5170-Q1是多相双向电流控制器,为汽车48V和12V双电池系统提供双路双向转换器的高压和精密器件,在高压和低压端口间调整平均电流流动,电流调整水平通过模拟或数字PWM输入进行编程,精度1%,满足汽车AEC-Q100规范,工作温度–40°C到+125°C,主要用在汽车双电池系统,超级电容或电池备份电源转换器,以及可堆栈降压或升压转换器.本文介绍了LM5170-Q1主要特性,框图和应用电路,以及评估板LM5170EVM-BIDIR主要特性和电性能,电路图,材料清单和PCB设计图.

The LM5170-Q1 controller provides the essential highvoltage and precision elements of a dual-channelbidirectional converter for automotive 48-V and 12-Vdual battery systems. It regulates the average currentflowing between the high voltage and low voltageports in the direction designated by the DIR inputsignal. The current regulation level is programmedthrough analog or digital PWM inputs.

Dual-channel differential current sense amplifiers anddedicated channel current monitors achieve typicalcurrent accuracy of 1%. Robust 5-A half-bridge gatedrivers are capable of driving parallel MOSFETswitches delivering 500 W or more per channel. Thediode emulation mode of the synchronous rectifiersprevents negative currents but also enables

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