bq2057, bq2057C bq2057T, bq2057W
SLUS025F − MAY 2001 − REVISED JULY 2002
ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGL...
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 Sensing
D Integrated Cell Conditioning for Reviving
Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage Of Charge
D Charge Status Output for Single or Dual Led
or Host Processor Interface
D Automatic Battery-Recharge Feature D Charge Termination by Minimum Current D Automatic Low-Power Sleep Mode When VCC
Is Removed
D EVMs Available for Quick Evaluation D Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin
MSOP
bq2057xSN or bq2057xTS SOIC (SN) or TSSOP (TS) PACKAGE
(TOP VIEW)
SNS
1
BAT
2
VCC
3
TS
4
8
COMP
7
CC
6
VSS
5
STAT
DESCRIPTION
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 ...