BQ25872 Datasheet, PDF (4/68 Pages) Texas Instruments – Battery Switch Charger

bq25872
SLUSCQ6 – OCTOBER 2016
NAME
VOUT
PMID
PIN
NO.
A3-G3, A4-
G4
A5-G5
TS_BUS
B2
GND
F2
TS_BAT
D1
BATN
G1
BATP
G2
SRN
E1
SRP
VBUS
EN
F1
A6, B6, C6,
D6, E6, F6,
G6
D2
CHGSTAT
E2
INT
C2
SDA
C1
SCL
B1
OVPGATE
A2
VUSB
A1
Pin Functions
I/O
DESCRIPTION
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P
Device power output. Connected to the drain of Q2.
P
Tie pins to each other and leave floating. Do not connect to any other pins. Connected to the
drain of Q1 and source of Q2.
AI
VBUS connector temperature qualification voltage input. Requires external resistor divider
and voltage reference.
P
Device ground.
AI
Battery temperature qualification voltage input. Requires external resistor divider and voltage
reference.
AI
Negative input for battery voltage sensing. Connect to negative terminal of battery pack.
Place 100-Ω/1-kΩ series resistance between pin and negative terminal.
AI
Positive input for battery voltage sensing. Connect to positive terminal of battery pack. Place
100-Ω/1-kΩ series resistance between pin and positive terminal.
AI
Negative input for battery current sensing. Place R_SENSE between SRN and SRP for battery
current sensing.
AI
Positive input for battery current sensing. Place R_SENSE between SRN and SRP for battery
current sensing.
P
Device power input.
DI
Active high device enable. Pull low to disable device. ADC not available when device is
disabled.
Open drain, active low battery switch indicator. Connect to pull-up voltage via 10-kΩ pull-up
DI
resistor. This pin will assert low if battery switch is enabled and will go high when battery
switch is disabled (due to fault or charge disabled or POR event).
Open drain, active low interrupt output. Connect to pull-up voltage via 10-kΩ pull-up resistor.
DO
Normally low, the INT pin asserts low to report status and faults. Keep constant low until the
host reads this register 0x03, 0x04.
DIO
I²C interface data. Connect to pull-up voltage via 1-kΩ pull-up resistor.
DI
I²C interface clock. Connect to pull-up voltage via 1-kΩ pull-up resistor.
AO
External OVP FET N-channel gate drive pin.
AI
Device power input. Place a 500-Ω series resistor between this pin and USB supply voltage.
4
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