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
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 S...