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TPS7A78: TPS7A7850使用半桥配置典型原理图,无5V输出.

Part Number: TPS7A78

TPS7A7850使用半桥配置典型原理图: CS=0.47UF/630V,RS=470Ω/5w,CSC1 =1UF,CSC2=2.2UF,CSCIN=220UF,CLDO_IN=47UF,R1=200 kΩ,R2=12kΩ,  调试无输出。

尝试在SCIN直接输入直流24V,测量CSC1和CSC2有PWM波形,LDO_IN有6V左右电压,PFD电压1.3V左右,但是LDO_OUT无输出5V,请问改如何调试或改哪边参数?

可以发本人邮箱,谢谢!47317891@qq.com