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请教:LM3429 OVP保护问题

Other Parts Discussed in Thread: LM3429

 Hi TI engineer ,

我想请教一下为何LM3429 在buck-boost架构中(fload ground),需要加一个PNP三极管进行OVP,

假设LED(正负极之间的电压为27V),输入18-32V,OVP设定为多少合适?