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请推荐锂电池充电芯片



TI工程师,你好,我现在使用2节锂电池(满电8.4V),想用5V充电,我的电路里需要用5V--1000mA, 3.3V--300mA,电路在充电时也要正常工作,所以请问我的充电芯片选用那个型号比较好,8.4V降到5V用DC/DC还是LDO,有什么芯片推荐。3.3V我是想从5V用LDO来做,这样的电路结构是否合适,另外,这个是低功耗设计,所以要静态电流比较小的芯片。谢谢。