BQ25101H Standalone 1-cell 250-mA linear battery charger with 4.35-V charge voltage & charging indication |

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Standalone 1-cell 250-mA linear battery charger with 4.35-V charge voltage & charging indication



The bq2510x series of devices are highly integrated Li-Ion and Li-Pol linear chargers targeted at space-limited portable applications. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2510x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops and charge termination. The pre-charge current and termination current threshold are programmed via an external resistor on the bq2510x. The fast charge current value is also programmable via an external resistor.


  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Supports Applications for Very Low
      Charge Currents - 10 mA to 250 mA
    • Supports minimum 1-mA Charge
      Termination Current
    • Ultra Low Battery Output Leakage
      Current - Maximum 75 nA
    • Adjustable Termination and Precharge
    • High voltage Chemistry Support: 4.35 V
      with bq25100H/01H, 4.30 V with bq25100A
  • Protection
    • 30-V Input Rating; with 6.5-V Input
      Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C
      Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET
      Short Detection
    • Operation over JEITA Range via Battery
      NTC – 1/2 Fast-Charge-Current at
      Cold, 4.06 V (bq25100/01) or 4.2 V
      (bq25100H/01H) at Hot
    • Fixed 10 Hour Safety Timer
  • System
    • Automatic Termination and Timer
      Disable Mode (TTDM) for Absent Battery
    • Available in Small 1.60 mm × 0.90 mm
      DSBGA Package


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Part number Order Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ25101H Order now 1     Charger     Li-Ion/Li-Polymer     0.25     4.45     6.5     30     4.35     4.35     JEITA BAT Temp Monitoring (Thermistor Pin)
Temp Monitoring (Thermistor Pin)
Thermal Regulation
Standalone (RC-Settable)     Linear     Catalog     0 to 125     DSBGA | 6     6DSBGA: 1 mm2: 1.4 x 1 (DSBGA | 6)