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TPS53319 DEMO板原理图上LL与GND之间预留RC作用咨询

Other Parts Discussed in Thread: TPS53319, TPS53318

TPS53319在我的板上轻载使用时正常,到5A时板子出现异常。TI的TPS53319 DEMO板上LL pin和GND之间预留了一个RC电路,在我的板上焊接RC后,故障现象有所改善。我想请教这个RC电路的作用,以及如何调整。