Lithium battery charging circuit

A lithium battery charging circuit comprises a time delay circuit, a charging management chip U1 and an MOS tube V8, a control pin DRV of the charging management chip U1 is connected with a grid electrode of the MOS tube V8, and the time delay circuit comprises a resistor R2, a resistor R3, a capacitor C1, a triode V2, a triode V4, a triode V5 and an MOS tube V6. And after the battery BAT is fully charged, the pin CHRG of the charging management chip U1 is at a high level, and the pin DONE is at a low level, so that the triode V5 is cut off, meanwhile, the MOS tube V8 is disconnected, the charging management chip U1 stops supplying power, and the lithium battery BAT stops charging. 一种锂电池充电电路，包括延时电路、充电管理芯片U1和MOS管V8，充电管理芯片U1的控制引脚DRV与MOS管V8的栅极连接，所述延时电路包括电阻R2、电阻R3、电容C1、三极管V2、三极管V4、三极管V5和MOS管V6。电池BAT充满电后，充电管理芯片U1的引脚CHRG为高电平，引脚DONE为低电平，使三极管V5截止，同时MOS管V8断开，充电管理芯片U1停止供电，锂电池BAT停止充电。