The IP2312 is a synchronous switch step-down battery charging IC. It features:

  • Synchronous switch step-down charging
  • Charging efficiency 94% (3.7V/2A)
  • Maximum charge current 3A
  • Charging current external resistance can be adjusted
  • Automatically adjust the input current, compatible with small current adapters
  • Support 4.20V/4.30V/4.35V/4.4V battery
  • Support charging NTC temperature protection
  • Support LED charging status indication
  • Built-in power MOS
  • 750KHz switching frequency, can support 1uH inductor
  • Input overvoltage and undervoltage protection
  • IC over temperature protection
  • Charging overtime protection

The maximum charging current can be set by resistor R4 (ISET): ISET = R4 = 135kV / I_CHARGE

Max Charging CurrentR4 (ISET)
1A135k
1.5A91k
2.1An.c.
3A45k

The maximum charging voltage can be set by resistor R6 (VSET):

Max Charging VoltageR6 (VSET)
4.2Vn.c.
4.3V43k
4.35V75k
4.4V100k

LiPo_Charger_IP2312_pic2.jpg LiPo_Charger_IP2312_pic3.jpg