Description
bq2057, bq2057C bq2057T, bq2057W SLUS025F * MAY 2001 * REVISED JULY 2002 ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLEĆ AND TWOĆCEL.
The BENCHMARQ bq2057 series advanced Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for costsensitive and.
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
Batt
Applications
* The bq2057 continuously measures battery temperature using an external thermistor. For safety, the bq2057 inhibits 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 th