系统输入电压是24V,我们打算用TPS5430将其转为5V,再用这个5V供给TPS65218以带动am4378及其最小系统。
这种两级降压,是不是不用怎么考虑第一级开关电源的输出纹波?或者虽然要考虑,但是具体到本方案依然可行的,因为TPS65218对输出电压的要求比较糙?
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Hi
两级转换没有问题,无需在意纹波(纹波很小的), 只需要满足前一级的输出电流电压满足后级的要求。