 English |
|
|
|
|
|
|
|
| BQ28400PWR Datasheet, PDF (19/24 Pages) Texas Instruments – Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection | |||
| |||
| ◁ |
www.ti.com
CHG FET
bq28400
SLUSA61A â OCTOBER 2010 â REVISED DECEMBER 2010
DSG FET
PACK+
1 KW
Cell 1
Q1
100 W
1 KW
Cell 2
Q2
100 W
CHG
VC1
0.1µF
VC2
0.1µF
VSS
DSG
NOTE: Q1 and Q2 are Si1023
type P-CH FETs
Figure 3. Internal Cell Balancing Control Circuit
PACK +
Fuse
SMBD
SMBC
PACK â
bq28400
RSNS
BAT
VC1
VC2
VSS
CB_EN
1k
1k
0.1 µF
1k
0.1 µF
360
0.22 µF
220 k
OUT
VC2
bq29200 VDD
VC1
CB_EN
VC1_CB
CD
GND
0.1 µF
Figure 4. External Auto Cell Balancing Circuit
Layout Recommendations
For an accurate differential voltage sensing, the VSS ground should be connected directly to the most negative
terminal of the battery stack, not to the positive side of the sense resistor. This minimizes the voltage drop across
the PCB trace.
Copyright © 2010, Texas Instruments Incorporated
19
Product Folder Link(s): bq28400
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese