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GLF73927B

Ultra-Efficient, Optimized IQSmartTM Battery Protection IC

home Product Battery Protection IC GLF73927B
Product Features

  • Over Charge Detection Voltage, VOC

    4.45 V ; VOC accuracy: ±1.2 % ; Detects VBAT to release VOC

  • Over Discharge Detection

    VOD: 2.80 V

  • Over Charge Current Detection

    IOC: 2.15 A

  • Short Circuit Protection

    ISC: 3.0 A

  • Activated by Applying VON to the VOUT Pin from Charger

  • Shipping Mode Implementation

  • Low RON

    32 mΩ Typ. at 3.6 VBAT

  • Low Quiescent Current,

    IQ : 1.6 μA Typ at 3.6 VBAT

  • Shutdown Current

    ISD = 6 nA Typ. at VBAT < VOD ; ISD = 8 nA Typ. at VBAT = 3.6 V, Shipping Mode ; ISD = 10 nA Typ. at VBAT = 4.2 V, Shipping Mode

  • Latch-off at Over Charge Current, Over Discharge Voltage and Short Circuit Protection.

  • 0 V Battery Charging

GLF73927B
Product manual
Sample application
Product Description


The GLF73927 family is an IQSmartTM ultra-efficient IC, with accurate over charge/discharge voltage protection, over charge current protection and short circuit protection.


The over charge and discharge voltage protections are capable of keeping a rechargeable battery working within the desired safe operating condition. When the battery is charged above the overcharge voltage detection level (VOC), the GLF73927 charging switches off after a preset delay time. As the battery voltage decreases lower than the over discharge detection voltage (VOD), the GLF73927 discharging switch is turned off immediately. In the off state,

GLF73927 consumes an ultra-low leakage current (ISD) to save the battery power. In addition, when the load current is higher than the short circuit protection current level (ISC), the GLF73927A is turned off and will maintain the off state to avoid any serious damage to system. The short circuit delay time can avoid any false trigger which might turn off the switch.


The GLF73927 provides a shipping mode to prevent smart devices which has a non-removable battery from discharging during the shipping period. When a charged battery cell is connected to the GLF73927, and GLF73927 remains in the off state, the smart devices consume an ultra-low leakage current (ISD). Note that the only way to active the GLF73927 is applying a charger output VON voltage to VOUT pin.


The GLF73927 has 0 V battery minimum voltage charging function, when discharged to around 0 V, the battery can still be charged up.