BQ24292I Datasheet, PDF (6/42 Pages) Texas Instruments – I2C Controlled 4.5A Single Cell USB/Adapter Charger With Narrow VDC Power Path Management and USB OTG

bq24292i
SLUSBI4 – APRIL 2013
PINOUTS
bq24292i RGE PACKAGE
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24 23 22 21 20 19
VBUS 1
PSEL 2
PG 3
STAT 4
SCL 5
SDA 6
18 PGND
17 PGND
16 SYS
15 SYS
14 BAT
13 BAT
7 8 9 10 11 12
PIN
NAME
VBUS
PSEL
PG
STAT
SCL
SDA
INT
OTG
CE
ILIM
TS1
TS2
PIN FUNCTIONS
TYPE
NO.
DESCRIPTION
1,24
P Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID
with VBUS on source. Place a 1µF ceramic capacitor from VBUS to PGND and place it as close as possible to IC. (Refer
to Application Information Section for details)
2
I Power source selection input. High indicates a USB host source and Low indicates an adapter source.
Digital
3
O Open drain active low power good indicator. Connect to the pull up rail via 10kohm resistor. LOW indicates a good input
Digital ^{source if the input voltage is between UVLO and ACOV, above SLEEP mode threshold, and current limit is above 30mA.}
4
O Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10kohm. LOW
Digital ^{indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT}
pin has a 10kΩ resistor to ground.
5
I
I²C Interface clock. Connect SCL to the logic rail through a 10kΩ resistor.
Digital
6
I/O I²C Interface data. Connect SDA to the logic rail through a 10kΩ resistor.
Digital
7
O Open-drain Interrupt Output. Connect the INT to a logic rail via 10kΩ resistor. The INT pin sends active low, 256us pulse
Digital ^{to host to report charger device status and fault.}
8
I USB current limit selection pin during buck mode, and active high enable pin during boost mode.
Digital _{In buck mode with USB host (PSEL=High), when OTG = High, IIN limit = 500mA and when OTG = Low, IIN limit =}
100mA.
The boost mode is activated when the REG01[5:4]=10 and OTG pin is High.
9
I Active low Charge Enable pin. Battery charging is enabled when REG01[5:4]=01 and CE pin = Low. CE pin must be
Digital ^{pulled high or low.}
10
I ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1V. A resistor is connected from ILIM pin to
Analog ^{ground to set the maximum limit as I}INMAX ^{= (1V/R}ILIM^{) × K}ILIM^{. The actual input current limit is the lower one set by ILIM}
and by I²C REG00[2:0]. The minimum input current programmed on ILIM pin is 500mA.
11
I Temperature qualification voltage input #1. Connect a negative temperature coefficient thermistor. Program temperature
Analog ^{window with a resistor divider from REGN to TS1 to GND. Charge suspends when either TS pin is out of range.}
Recommend 103AT-2 thermistor and do not add decoupling capacitor on TS1 pin.
12
I Temperature qualification voltage input #2. Connect a negative temperature coefficient thermistor. Program temperature
Analog ^{window with a resistor divider from REGN to TS1 to GND. Charge suspends when either TS pin is out of range.}
Recommend 103AT-2 thermistor and do not add decoupling capacitor on TS2 pin.
6
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