BQ2057 Datasheet PDF

●DESCRIPTION

●The BENCHMARQ 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.

●FEATURES

●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 Small Number of External Components

●0.3 V Dropout Voltage for Minimizing Heat Dissipation

●Better Than ±1% Voltage Regulation Accuracy With Preset Voltages

●AutoCompDynamic Compensation of Battery Pack’s Internal Impedance to Reduce Charge Time

●Optional Cell-Temperature Monitoring Before and During Charge

●Integrated Voltage and Current Regulation With Programmable Charge-Current and High or Low-Side Current Sensing

●Integrated Cell Conditioning 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-Recharge Feature

●Charge Termination by Minimum Current

●Automatic Low-Power Sleep Mode When VCC Is Removed

●EVMs Available for Quick Evaluation

●Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin MSOP