BQ2057WSNTR ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002function
BQ2057WTS ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002DESCRIPTION (continued)The bq ..
BQ2057WTS ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTMFEATURESDESCRIPTION Ideal for Single (4.1 V or 4.2 V) and Dual-CellThe BENCHMARQ bq2057 series adv ..
BQ2057WTS ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTMFEATURESDESCRIPTION Ideal for Single (4.1 V or 4.2 V) and Dual-CellThe BENCHMARQ bq2057 series adv ..
BQ2057WTSTR ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002Terminal FunctionsTERMINALNO. ..
BQ2057WTSTR ,Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002 ..
BUK127-50DL ,PowerMOS transistor Logic level TOPFET
BUK127-50DL ,PowerMOS transistor Logic level TOPFET
BUK128-50DL ,Logic level TOPFET SMD version of BUK117-50DL
BUK129-50DL ,Logic level TOPFET SMD version of BUK118-50DLLIMITING VALUESAt a drain source voltage above 50 V the power MOSFET is actively turned on to clamp ..
BUK130-50DL ,Logic level TOPFET SMD version of BUK119-50DL
BUK139-50DL ,Logic level TOPFET D-PAK version of BUK118-50DLLIMITING VALUESAt a drain source voltage above 50 V the power MOSFET is actively turned on to clamp ..
BQ2057W-BQ2057WSN-BQ2057WSNG4-BQ2057WSNTR-BQ2057WTS-BQ2057WTSTR
Li-Ion Low-Dropout Linear (8.4V) Charge Management IC For Two-Cell Applications With AutoCompTM
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FEATURES 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 Requires Small Number of External
Components 0.3 V Dropout Voltage for Minimizing Heat
Dissipation Better Than ±1% Voltage Regulation Accuracy
With Preset Voltages AutoComp� Dynamic Compensation of
Battery Pack’s Internal Impedance to Reduce
Charge Time Optional Cell-Temperature Monitoring Before
and During Charge Integrated Voltage and Current Regulation
With Programmable Charge-Current and High-
or Low-Side Current Sensing Integrated Cell Conditioning for Reviving
Deeply Discharged Cells and Minimizing Heat
Dissipation During Initial Stage Of Charge Charge Status Output for Single or Dual Led
or Host Processor Interface Automatic Battery-Recharge Feature Charge Termination by Minimum Current Automatic Low-Power Sleep Mode When VCCIs Removed EVMs Available for Quick Evaluation Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin
MSOP DESCRIPTIONThe BENCHMARQ bq2057 series advanced
Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear
charge-management ICs are designed for cost-
sensitive 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 compensation in a single 8-pin IC. MSOP,
TSSOP, and SOIC package options are offered to fit a
wide range of end 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 the battery
voltage is below the low-voltage threshold, V(min), the
bq2057 precharges using a low current to condition the
battery. The conditioning charge rate is approximately
10% of the regulation current. The conditioning current
also minimizes heat dissipation in the external pass-
element during the initial stage of the charge. After
conditioning, the bq2057 applies a constant current to
the battery. An external sense-resistor sets the current.
The sense-resistor can be on either the high or low side
of the battery without additional components. The
constant-current phase continues until the battery
reaches the charge-regulation voltage.
COMP
VSS
STAT
SNS
BAT
VCC
bq2057xSN or bq2057xTS
SOIC (SN) or TSSOP (TS) PACKAGE
(TOP VIEW)BAT
SNS
COMP
VCC
STAT
VSS
bq2057xDGK
MSOP (DGK) PACKAGE
(TOP VIEW)Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
