各位老师好:
打算做一个开关电源,里面有多个DC-DC电路,他们的开关频率应该如何选择。
1、主电源使用UCC2893 反激 85-265Vac输入,输出48Vdc2.5A
2、使用LM5116 方案降压: 48V 转 38V
3、使用TPS54160 方案: 38V 转双电源 +15V/0.8A -15V/0.1A
4、使用TPS54335A方案: +15V转+5V
谢谢!
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