bq2057W - Texas Instruments

bq2057W Linear Charge Management

The BENCHMARQ bq2057 series advanced Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for costsensitive 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 com.

Features

D 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 D Requires Small Number of External Components D 0.3 V Dropout Voltage for Minimizing Heat Dissipation D Better Than ±1% Voltage Regulation Accuracy With Preset Voltages D AutoCompt Dynamic Compensation of Battery Pack’s Internal Impedance to Reduce Charge Time D Optional Cell-Temperature Monitoring Before and During Charge D Integrated Voltage and Current Regulation With Programmable Charge-Current and Highor Low-Side Current Sensing D Integrated Cell Conditioning for Reviving Deeply Discharged Cells and.