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63020怎样实现工作高温后输出电压自动下降

Other Parts Discussed in Thread: TPS63020

问题如题.因手中的样品可以实现在工作温度上升到一个范围后,输出电压自动下降,但自己做的产品无法实现这个功能.样品和自己做的产品外围元件一样,就是TPS63020资料里的升降压电路.请大侠知道一下