DRV8251: DRV8251驱动电流调整

我参考TI的推荐电路，想用调整VREF的方式来调整输出电流，但实际调试的过程中调整VREF(0~3.3v),VOUT1到VOUT2的电流没有变化，总是200mA左右.

Links：

您好，

理论上，通过Vref是可以调节的，请查看下面链接中的我们专家的回复

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1215523/drv8251-minimum-coil-inductance-for-drv8251-current-regulation-and-minimum-vref-current-regulation-level#:~:text=2)%20What%20is%20the%20minimum%20coil%20inductance

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1300773/drv8251a-vref-value#:~:text=The%20VREF%20input%20sets%20the%20current

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Chunjiang Wu：

最小的电流受blank时间限制的，芯片最小的打开时间是blank时间，假如在这个时间内，电感电流就超过设定电流了，电流就没法小下去了；这个时间内的电流由供电电压、电感量、内阻、反电动势决定