要求如下:
1.3S锂离子电池(7.5V-13.2V输入),降压到5V输出;
2.工作电流很小,大概为0.25A左右,要求转换效率高,在92%以上;
3.要求能实时通过LED灯粗略显示(电压比较法)剩余电量;
4.长按3秒开机,短按LED显示电量。
请帮忙推荐整体方案,谢谢。
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