LM25813的最大占空比是多少?设计变压器的公式里面是0.7,最大占空比是0.7?还有最小电感值实在最小关断时间Toffmin和0.5A计算,为什么?
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HI
按照datasheet 里的设计案例计算步骤来设计即可(从datasheet 第20页开始)
如你所说,最大duty按照70%来设计。
看公式15, Toffmin最小时就是Lmagmin。
0.5A, 见datasheet 第12页:At even lighter loads, the primary-side peak current set by the internal error amplifier decreases to a minimum level of 0.5 A, or 20% of its 2.5-A peak value,
HI
Powerpad需要充分与GND焊接,并借助PCB上GND铜箔散热。