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UCC256301: 1、模块一直处于断续突发模式,请问如何暂时先不配置突发模式 2、芯片FB脚在死区时间内会突然下跌一个大负压是怎么回事?

Part Number: UCC256301
Other Parts Discussed in Thread: TL431,

1、模块在各载下一直处于断续突发模式,请问如何暂时先不配置突发模式。去掉突发模式在调试。

2、FB 脚测得电压在死区时间内有个大负压-990mV,请问是怎么回事。该如何调试呢?

    波形3通道为芯片FB脚-粉色,  2,4通道为上下管驱动波形。