Quick charge management circuit of lithium cell USB

The utility model relates to a quick charge management circuit of lithium cell USB, multifunctional charging conversion device USB charging circuit unit, MCU control circuit unit, a voltage -divider network unit, the 2nd voltage -divider network unit, a drive circuit unit, the 2nd drive circuit unit, charging current sampling unit, charge protection unit and charging switch unit, a MCU control circuit unit and a voltage -divider network unit, the 2nd voltage -divider network unit, a drive circuit unit, charging current sampling unit and lithium cell group link, a drive circuit unit is through the 2nd drive circuit unit and charge protection unit connection, charge protection unit and charging switch unit and lithium cell group link. The utility model discloses a 2 the level drive comes the drive power MOS pipe for power consumption is reduced to switching on and the speed of closing of power MOS pipe, and reduce and generate heat and energy loss, the utility model discloses an input the withstand voltage 20V