BQ2057CSN BENCHMARQ, BQ2057CSN Datasheet - Page 7
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BQ2057CSN
Manufacturer Part Number
BQ2057CSN
Description
PROG BATTERY CHARGER, 2057, SOIC8
Manufacturer
BENCHMARQ
Datasheet
1.BQ2057CSN.pdf
(31 pages)
Specifications of BQ2057CSN
Battery Type
Li-Ion / Li-Polymer
Input Voltage
15V
Battery Charge Voltage
4.2V
Charge Current Max
2A
Battery Ic Case Style
SOIC
No. Of Pins
8
No. Of Series Cells
1
Operating Temperature
RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BQ2057CSN
Manufacturer:
TIBB
Quantity:
529
Part Number:
BQ2057CSN
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
BQ2057CSNTR
Manufacturer:
TI/德州仪器
Quantity:
20 000
functional description
The bq2057 is an advanced linear charge controller for single or two-cell Li-Ion or Li-Pol applications. Figure 1
shows the schematic of charger using a PNP pass transistor. Figure 2 is an operational state diagram, and
Figure 3 is a typical charge profile. Figure 4 shows the schematic of a charger using P-channel MOSFET.
GND
DC+
0.1 µF
R SNS
0.2 Ω
C2
Figure 1. Low Dropout Single- or Two-Cell Li-Ion/Li-Pol Charger
FZT788B
Q1
R1
1 kΩ
CC
SNS
VCC
VSS
APPLICATION INFORMATION
bq2057
COMP
STAT
BAT
TS
www.ti.com
V CC
R2
2 kΩ
D1
V CC
R T2
R T1
C1
0.1 µF
PACK+
PACK−
TEMP
SLUS025F − MAY 2001 − REVISED JULY 2002
Battery
Pack
NTC
7