www.ti.com
SLUS549D – DECEMBER 2002 – REVISED MARCH 2006
Terminal Functions
TERMINAL
NAME
AC
CE
ISET1
ISET2
OUT
PG
STAT1
STAT2
TE
TS
TTE
USB
VSS
Exposed
Thermal
Pad
I/O
bq24020 bq24022
bq24023 bq24024 bq24026
bq24025 bq24027
1
8
6
7
10
-
3
4
-
9
-
2
5
1
9
6
7
10
8
3
4
-
-
-
2
5
1
8
6
7
10
-
3
4
-
-
9
2
5
1
-
6
7
10
-
3
4
-
9
8
2
5
1
-
6
7
10
-
3
4
8
9
-
2
5
I
I
I
I
O
O
O
O
I
I
I
I
-
DESCRIPTION
AC charge input voltage
Charge enable input (active low)
Charge current set point for AC input and precharge and taper
set point for both AC and USB
Charge current set point for USB port (high=500 mA, low=100
mA, hi-z = disable USB charge)
Charge current output
powergood status output (active low)
Charge status output 1 (open-drain)
Charge status output 2 (open-drain)
Timer enable input (active low)
Temperature sense input
Timer and termination enable input (active low)
USB charge input voltage
Ground input
There is an internal electrical connection between the
exposed thermal pad and VSS pin of the device. The exposed
thermal pad must be connected to the same potential as the
VSS pin on the printed circuit board.
Do not use the thermal
pad as the primary ground input for the device.
VSS pin
must be connected to ground at all times
pad
pad
pad
pad
pad
-
7
TI [ TEXAS INSTRUMENTS ]
