Datasheet

1
2
3
DSG
4
BAT
5
6
VC2
7
VC3
8
VC4
9
10
SRP
CHG
PACK
ZVCHG
24
FUSE
23
REG27
22
VSS
21
VC1
11
SRN
12
TS1
TS2
NC
RBI
20
19
PRES
18
SMBC
17
NC
16
SMBD
15
14
13NC
NC
bq3060
SLUS928A –MARCH 2009–REVISED NOVEMBER 2009 www.ti.com
PIN DETAILS
TSSOP (PW)
(TOP VIEW)
Table 2. Pin Functions
PIN
I/O DESCRIPTION
NAME NO.
BAT 1 P Power input from battery
DSG 2 O P-CH FET Drive controlling discharge
Sense voltage input terminal and external cell balancing drive output for most positive cell, and
VC1 3 IA
battery stack measurement input.
Sense voltage input terminal and external cell balancing drive output for second most positive
VC2 4 IA
cell.
VC3 5 IA Sense voltage input terminal and external cell balancing drive output for third most positive cell.
VC4 6 IA Sense voltage input terminal and external cell balancing drive output for least positive cell.
Analog input pin connected to the internal coulomb-counter peripheral for integrating a small
SRP 7 IA
voltage between SRP and SRN where SRP is the top of the sense resistor.
Analog input pin connected to the internal coulomb-counter peripheral for integrating a small
SRN 8 IA
voltage between SRP and SRN where SRN is the bottom of the sense resistor.
TS1 9 I/O,IA Thermistor input TS1
TS2 10 I/O,IA Thermistor input TS2
NC 11 - Keep this pin floating
NC 12 - Keep this pin floating
NC 13 - Keep this pin floating
SMBD 14 I/OD SMBus data pin
NC 15 - Keep this pin floating
SMBC 16 I/OD SMBus clock pin
PRES 17 I/OD Active low input to sense system insertion and typically requires additional ESD protection
RAM backup pin to provide backup potential to the internal DATA RAM if power is momentarily
RBI 18 P
lost by using a capacitor attached between RBI and VSS
VSS 19 P Device ground
REG27 20 P Internal power supply 2.7V bias output
FUSE 21 I/OD Push-pull fuse drive and secondary protector activation input sensing
ZVCHG 22 O P-CH precharge FET Drive controlling pre-charge and zero-volt charge
CHG 23 O P-CH FET Drive controlling charge
PACK 24 P PACK positive terminal and alternative power source
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