BQ24196_17 Datasheet, PDF (4/50 Pages) Texas Instruments – I2C Controlled 2.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG

bq24196
SLUSB98A – OCTOBER 2012 – REVISED DECEMBER 2014
6 Pin Configuration and Functions
RGE Package
24-Pin VQFN With Exposed Thermal Pad
(Top View)
www.ti.com
24 23 22 21 20 19
VBUS 1
PSEL 2
PG 3
STAT 4
SCL 5
SDA 6
bq24196
18 PGND
17 PGND
16 SYS
15 SYS
14 BAT
13 BAT
7 8 9 10 11 12
PIN
NAME NUMBER
VBUS
1,24
PSEL
2
PG
3
STAT
4
SCL
5
SDA
6
INT
7
OTG
8
CE
9
ILIM
10
TS1
11
TS2
12
Pin Functions
TYPE
DESCRIPTION
Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID
P with VBUS on source. Place a 1-µF ceramic capacitor from VBUS to PGND and place it as close as possible to IC. (Refer
to Application Information Section for details)
I
Power source selection input. High indicates a USB host source and Low indicates an adapter source.
Digital
O Open drain active low power good indicator. Connect to the pull up rail via 10-kΩ 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 30 mA.
O
Digital
Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10-kΩ. LOW
indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT
pin blinks at 1 Hz.
I
Digital
I²C Interface clock. Connect SCL to the logic rail through a 10-kΩ resistor.
I/O
Digital
I²C Interface data. Connect SDA to the logic rail through a 10-kΩ resistor.
O Open-drain Interrupt Output. Connect the INT to a logic rail via 10-kΩ resistor. The INT pin sends active low, 256-us pulse
Digital to host to report charger device status and fault.
USB current limit selection pin during buck mode, and active high enable pin during boost mode.
I In buck mode with USB host (PSEL=High), when OTG = High, IIN limit = 500 mA and when OTG = Low, IIN limit = 100
Digital mA.
The boost mode is activated when the REG01[5:4] = 10 and OTG pin is High.
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.
I
Analog
ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1 V. A resistor is connected from ILIM pin to
ground to set the maximum limit as I_INMAX = (1V/R_ILIM) × 530. 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 500 mA.
I
Analog
Temperature qualification voltage input #1. Connect a negative temperature coefficient thermistor. Program temperature
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.
I
Temperature qualification voltage input #2. Connect a negative temperature coefficient thermistor. Program temperature
Analog
window with a resistor divider from REGN to TS2 to GND. Charge suspends when either TS pin is out of range.
Recommend 103AT-2 thermistor. TS1 and TS2 pin can be connected together for single thermistor application.
4
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