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3节串锂电池太阳能充电方案

Other Parts Discussed in Thread: BQ24650

应用要求:

1.双电源供电,太阳能(18V 20W)和适配器,当太阳能长时间充不满时会考虑定期适配器充下,适配器规格目前可以自选

2.电池规格为12.6V/5AH,充电电流暂想设置2.5A

问题如下:

1.目前芯片是否可用BQ24650,还是有其它更适用芯片?

2.考虑到双电源供电和MPPT点,那建议适配器电压选用多少,需要高于太阳能电压吗?