BQ28400PWR Datasheet, PDF (3/24 Pages) Texas Instruments – Tablet PC and Netbook 2-Series Cell Li-Ion Battery Gas Gauge and Protection

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SLUSA61A – OCTOBER 2010 – REVISED DECEMBER 2010
BAT 1
DSG 2
VC1 3
VC2 4
VSS 5
SRP 6
SRN 7
TS1 8
CB_EN 9
SMBD 10
20 PACK
19 CHG
18 ZVCHG
17 FUSE
16 REG27
15 VSS
14 RBI
13 PRES
12 SMBC
11 NC
PIN NAME
BAT
DSG
VC1
VC2
VSS
SRP
SRN
TS1
CB_EN
SMBD
NC
SMBC
PRES
RBI
VSS
REG27
FUSE
ZVCHG
CHG
PACK
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TYPE ⁽¹⁾
P
O
AI
AI
P
AI
AI
I
O
I/OD
—
I/OD
I
P
P
P
O
O
O
P
PIN FUNCTIONS
DESCRIPTION
Alternate supply input
P-channel discharge FET gate drive
Sense input for the most positive cell. Also external cell balancing drive output for the
most positive cell
Sense input for the lowest cell. Also external cell balancing drive output for the lowest
cell
Device ground
Differential Coulomb Counter input or SRP oversampled ADC input
Differential Coulomb Counter input or SRN oversampled ADC input
Thermistor 1 input. Connect NTC from this pin to VSS pin
Output signal to control cell balancing
SBS data
No connection, leave floating
SBS clock
System present
RAM backup pin to provide backup potential to the internal DATA RAM if power is
momentarily lost, by using a capacitor attached between RBI and VSS
Device ground
2.7-V regulator. Connect a capacitor between REG27 and VSS
Push-pull fuse circuit drive
P-channel precharge FET gate drive
P-channel charge FET gate drive
Alternate supply input
(1) P = Power Connection, O = Digital Output, AI = Analog Input, I = Digital Input, I/OD = Digital Input/Output
Copyright © 2010, Texas Instruments Incorporated
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