开关波形呈现大小波随着输出电流增大噪声也增大。
以下为输出开关波形以及FB反馈波形。
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Hi
layout 很难看的,特别是复杂的layout, 具体你可以看datasheet说明或者参考EVM板。
除了变压器,也建议你测试一下保护信号?