This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS5430是否对输出电容要求严格?

Other Parts Discussed in Thread: TPS5430

上几天做了个TPS5430的电源板,输入+28V,输出+12V1A。

实际调试过程中发现芯片会挑输出电容。当电容C4为220uF50V电解电容时,电路输出正常;当换为两个100uF钽电容并联时,带载超过约400mA后电感会啸叫,PH脚波形变形,输出纹波变成正弦波。。

当更换其他电容,增加或减少电容值都会有这种现象,换成220uF50V电解电容后电路工作又正常了。增加电感值到150uH也是如此。

不太懂,特地来请教一下。

另外,Vsense端对地加入0.1uF电容会不会导致输出不稳定?