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BQ2057 Battery Charger IC (8.4V) Li-Ion, Li-Pol

-5% BQ2057 Battery Charger IC (8.4V) Li-Ion, Li-Pol

The  bq2057 series advanced Lithium-Ion (Li-Ion)and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for cost sensitive and compact portable electronics. They combine high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp charge-rate compensation in a single 8-pin IC. MSOP, TSSOP, and SOIC package options are offered to fit a wide range of end applications. The bq2057 continuously measures battery temperature using an external thermistor. For safety, the bq2057inhibits charge until the battery temperature is within user-defined thresholds. The bq2057 then charges the battery in three phases: conditioning, constant current, and constant voltage. If the battery voltage is below the low-voltage threshold, V(min), the bq2057 precharged using a low current to condition the battery. The conditioning charge rate is approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass element during the initial stage of the charge. After conditioning, the bq2057 applies a constant current to the battery. An external sense-resistor sets the current. The sense-resistor can be on either the high or low side of the battery without additional components. The constant-current phase continues until the battery reaches the charge-regulation voltage.


  • Battery Charge Voltage: 8.4V
  • Battery IC Case Style: SOIC
  • Battery Type: Li-Ion, Li-Pol
  • Charge Current Max:2A
  • Input Voltage: 15V
  • MSL: MSL 1 - Unlimited
  • No. of Pins: 8
  • No. of Series Cells:2
  • Operating Temperature Max: 70°C
  • Operating Temperature Min: -20°C
  • Packaging: Each


  • Ideal for Single(4.1 V or 4.2 V) and Dual-Cell (8.2 V or 8.4 V) Li-Ion or Li-Pol Packs
  • Requires SmallNumber of External Components
  • 0.3 V dropout voltage for Minimizing Heat Dissipation
  • Better Than ±1%Voltage Regulation Accuracy With Preset Voltages
  • AutoComp™ DynamicCompensation of Battery Pack’s Internal Impedance to Reduce Charge Time
  • OptionalCell-Temperature Monitoring Before and During Charge
  • Integrated Voltage and Current Regulation With Programmable Charge-Current and High-or Low-SideCurrent Sensing
  • Integrated CellConditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage Of Charge
  • Charge status output for Single or Dual Led or Host Processor Interface
  • Automatic Battery-RechargeFeature
  • Charge Terminationby Minimum Current
  • AutomaticLow-Power Sleep Mode When VCC Is Removed
  • EVMs Available for Quick Evaluation
  • Packaging: 8-PinSOIC, 8-Pin TSSOP, 8-Pin MSOP

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  • Views: 2927
  • Product Code: BQ2057 Battery Charger IC
  • Availability: In Stock
  • Rs100.00
  • Rs95.00

Tags: bq2057wsn, 2057, wsn, smd, battery, charger, ic, 8.4v, 8.4, volt, li-ion, li-pol, power, product, power converter

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