Datasheet Summary
bq2057, bq2057C bq2057T, bq2057W
SLUS025F
- MAY 2001
- REVISED JULY 2002
ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLEĆ AND TWOĆCELL LITHIUMĆION AND LITHIUMĆPOLYMER
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 ponents
D 0.3 V Dropout Voltage for Minimizing Heat
Dissipation
D Better Than ±1% Voltage Regulation Accuracy
With Preset Voltages
D Autopt Dynamic pensation 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...