帮我推荐一款电池电源管理芯片,三节电池做为电源输入,每节电池1.5V,输出为3.3V,电池为普通电池,要求能将电池电量耗尽,以延长使用时间。
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依我猜测应该是3节干电池串联降压产生3.3V,考虑快耗尽时电池内阻变大,变换器输入端电压可能会低于3.3V。所以4开关buckboost拓扑比较适合。
建议采用TPS63031,典型应用包含“three-cell alkaline, NiCd or NiMH battery”。http://www.ti.com/product/tps63031