BD71631QWZ (New)
Linear Charger for Low Voltage Battery

BD71631QWZ is a linear charger for low charge voltage battery. The battery charge voltage, charge current, termination current are set using external resisters.

Data Sheet Buy * Sample *
* This is a standard-grade product.
For Automotive usage, please contact Sales.

Product Detail

Part Number | BD71631QWZ-TR
Status | Recommended
Package | UMMP10LZ1824
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes




Supply Voltage(Min.)[V]

2.9/4.0 (Charge Current 30mA/300mA)

Supply Voltage(Max.)[V]


Charge Voltage [V]


Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]


Package Size [mm]

2.4x1.8 (t=0.4)


  • Adjustable Termination Current: 50μA to 10mA
  • Low Quiescent Battery Current: IBATT = 0μA (typ)
  • NTC Thermistor Input for Temperature Qualified Charging
  • Open-Drain Charge indicator LED Output
  • Fixed 10 hour Safety Timer
  • Thermal Shutdown
  • Under Voltage Lockout Protection
  • Battery Over Voltage Protection


    • Evaluation Board
    • BD71631QWZ-EVK-001
    • This EVK is for evaluating the linear charging IC BD71631QWZ, and charges 4.2V from the 5V input voltage. BD71631QWZ accepts a power supply input range of 2.9V to 5.5V and generates a charging battery voltage ranging from 2.0V to 4.7V using external resistors. If the charging current is VIN ≥ 4V, it can be used up to 300mA under the condition of VIN-VOUT ≥ 1V and up to 100mA under the condition of VIN-VOUT ≥ 0.3V. If 2.9V ≤ VIN ≤ 5.5V, it can be used up to 30mA under the condition of VIN-VOUT ≥ 0.3V. The charging current can be set with an external resistor. The termination current can be set from 50μA to 10mA using external resistors. Additional protection functions include a built-in Fixed 10-hour Safety Timer, UVLO(Under Voltage Lock Out), TSD(Thermal Shutdown Detection), and Battery Over Voltage Protection.

  • User's Guide Buy
    • Reference Design
    • REFLVBMS001-EVK-001
    • This collaboration board charges the EnerCera® Pouch rechargeable battery manufactured by NGK, and outputs the power stored in the EnerCera® by stepping down and stabilizing it. The Power Supply and RESET ICs with Nano Energy™ echnology maximizes the battery life.

  • User's Guide Purchase Inquiry