 English |
|
|
|
|
|
|
|
| BQ2057DGKR Datasheet, PDF (7/24 Pages) Texas Instruments – ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO CELL LITHIUM-POLYMER | |||
| |||
| ◁ |
DC+
GND
APPLICATION INFORMATION
bq2057, bq2057C
bq2057T, bq2057W
SLUS025F â MAY 2001 â REVISED JULY 2002
RSNS
Q1
0.2 ⦠FZT788B
PACK+
C2
0.1 µF
R1
1 kâ¦
VCC
bq2057
CC
COMP
SNS
BAT
VCC
TS
VSS
STAT
VCC
RT1
D1
RT2
R2
2 kâ¦
C1
0.1 µF
PACKâ
TEMP
NTC
Battery
Pack
Figure 1. Low Dropout Single- or Two-Cell Li-Ion/Li-Pol Charger
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.
www.ti.com
7
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese