锂电输入,用TPS43000输出4.0V,2A(峰值)。但是电流增大时,电压会大幅下降。1A时电压降到3.1V这样了。
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Hi
至少1A是没有问题的,datasheet上有案例。
建议您确认一下变压器。
(你可以按照datasheet电路测试看看,先保证1A,然后再加大)