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BQ2057CSNG4 Datasheet(PDF) 4 Page - Texas Instruments

Part # BQ2057CSNG4
Description  ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE-AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYMER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

BQ2057CSNG4 Datasheet(HTML) 4 Page - Texas Instruments

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bq2057, bq2057C
bq2057T, bq2057W
SLUS025F − MAY 2001 − REVISED JULY 2002
4
www.ti.com
Terminal Functions
TERMINAL
NO.
I/O
DESCRIPTION
NAME
SOIC (SN) and
TSSOP (TS)
MSOP
(DGK)
I/O
DESCRIPTION
BAT
2
8
I
Voltage sense input
CC
7
5
O
Charge control output
COMP
8
6
I
Charge-rate compensation input (AutoComp)
SNS
1
7
I
Current sense input
STAT
5
3
O
Charge status output
TS
4
2
I
Temperature sense input
VCC
3
1
I
Supply voltage
VSS
6
4
Ground
detailed description
current-sense input
Battery current is sensed via the voltage developed on this pin by an external sense resistor. The external
resistor can be placed on either the high or low side of the battery. (See schematics for details.)
battery-voltage input
Voltage sense-input tied directly to the positive side of the battery.
temperature sense input
Input for an external battery-temperature monitoring circuit. Connecting this input to VCC/2 disables this feature.
charge-status output
3-state indication of charge in progress, charge complete, and temperature fault or sleep mode.
charge-control output
Source-follower output that drives an external pass-transistor (PNP or P-channel MOSFET) for current and
voltage regulation.
charge-rate compensation input
Sets the charge-rate compensation level. The voltage-regulation output may be programmed to vary as a
function of the charge current delivered to the battery.
supply voltage input
Power supply input and current reference for high-side sensing configuration.


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