BQ2057 ,Li-Ion Low-Dropout Linear (4.1V) Charge Management IC For One-Cell Applications With AutoCompTMFEATURESDESCRIPTION Ideal for Single (4.1 V or 4.2 V) and Dual-CellThe BENCHMARQ bq2057 series adv ..
BQ2057C ,Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002Terminal FunctionsTERMINALNO. ..
BQ2057CDGK ,Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTMblock diagramVCCVInternal Reference CC_DONE+Sleep Mode_V-ControlBAT+CCI-ControlVoltage RegulationCO ..
BQ2057CDGKG4 ,Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.2V 8-VSSOP -20 to 70FEATURESDESCRIPTION Ideal for Single (4.1 V or 4.2 V) and Dual-CellThe BENCHMARQ bq2057 series adv ..
BQ2057CDGKR ,Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM SLUS025F − MAY 2001 − REVISED JULY 2002function
BQ2057CDGKRG4 ,Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.2V 8-VSSOP -20 to 70FEATURESDESCRIPTION Ideal for Single (4.1 V or 4.2 V) and Dual-CellThe BENCHMARQ bq2057 series adv ..
BUJ100 ,NPN power transistor
BUJ100 ,NPN power transistor
BUJ100LR ,NPN power transistorApplications Compact fluorescent lamps (CFL) Inverters Electronic lighting ballasts Off-line se ..
BUJ103A ,Silicon Diffused Power Transistorapplications, converters, inverters, switching regulators, motor controlsystems, etc.QUICK REFERENC ..
BUJ103AD ,Silicon diffused power transistorLimiting valuesIn accordance with the Absolute Maximum Rating System (IEC 60134).Symbol Parameter C ..
BUJ103AX ,Silicon Diffused Power Transistorapplications, converters, inverters, switching regulators, motorcontrol systems, etc.QUICK REFERENC ..
BQ2057-BQ2057DGK-BQ2057SN-BQ2057SNG4-BQ2057TS-BQ2057TSG4
Li-Ion Low-Dropout Linear (4.1V) Charge Management IC For One-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.
