紧急求助：如何减小开关电源的输出纹波？ 开关电源, 输出, 求助

flyoung

请教各位高手和斑竹，我现在在设计一个输入电压12V,输出28V，输出电流2A的开关电源，用的是国半的LM3478,现在输出纹波太大，拜求各位高手，如何才能减小电源的输出纹波呢？[em24][em24]

[此贴子已经被作者于2004-5-21 9:25:05编辑过]

xiaoping.chu

- How about your input smoothing cap? enough? pls calculate.
- What about your storing energy inductance ? high value will be better .
- What about your output smoothing cap ? low ESR?
- What about compensation for your circuit? wave is stable?
- How to measure ripple?