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LM5145-Q1: 在调试LM5145-Q1时候发现,当使用500kHz时,存在掉电压情况,想请教一下,是该怎么解决呢?

Part Number: LM5145-Q1

在调试LM5145-Q1时候发现,当使用500kHz时,存在掉电压情况,想请教一下,是该怎么解决呢?

VIN=48V,带载1A,电压掉至5V左右;

VIN=48V,带载2A,电压掉至0V左右;

  • HI

        首先确认功率电感饱和电流足够大?  然后layout上功率回路尽量小。

        以及确认电流保护参数,和保护电路的layout(Connect the ILIM setting resistor from the drain of the low-side MOSFET to ILIM and make the connections as close as possible to the LM5145-Q1. The trace from the ILIM pin to the resistor must avoid coupling to a high-voltage switching net.)