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BQ24195 Datasheet, PDF (5/41 Pages) Texas Instruments – I2C Controlled 2.5A / 4.5A Single Cell USB/Adapter Charger With 5.1V at 1A / 5.1V at 2.1A Synchronous Boost Operation
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PINOUTS
bq24195
bq24195L
SLUSB97 – OCTOBER 2012
24 23 22 21 20 19
VBUS 1
D+ 2
D– 3
STAT 4
SCL 5
SDA 6
bq24195L
bq24195
18 PGND
17 PGND
16 SYS
15 SYS
14 BAT
13 BAT
7 8 9 10 11 12
PIN
NAME
VBUS
D+
D–
STAT
SCL
SDA
INT
OTG
CE
ILIM
TS1
TS2
BAT
SYS
PIN FUNCTIONS
NO.
1,24
2
3
4
5
6
7
8
9
10
11
12
13,14
15,16
TYPE
P
I
Analog
I
Analog
O
Digital
I
Digital
I/O
Digital
O
Digital
I
Digital
I
Digital
I
Analog
I
Analog
I
Analog
P
P
DESCRIPTION
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)
Positive line of the USB data line pair. D+/D– based USB host/charging port detection. The detection includes data
contact detection (DCD) and primary detection in bc1.2.
Negative line of the USB data line pair. D+/D– based USB host/charging port detection. The detection includes data
contact detection (DCD) and primary detection in bc1.2.
Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10kohm. LOW
indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT
pin blinks at 1Hz.
I2C Interface clock. Connect SCL to the logic rail through a 10kΩ resistor.
I2C Interface data. Connect SDA to the logic rail through a 10kΩ resistor.
Open-drain Interrupt Output. Connect the INT to a logic rail via 10kΩ resistor. The INT pin sends active low, 256us pulse
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.
In buck mode with USB host, 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.
Active low Charge Enable pin. Battery charging is enabled when REG01[5:4]=01 and CE pin = Low. CE pin must be
pulled high or low.
ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1V. A resistor is connected from ILIM pin to
ground to set the maximum limit as IINMAX = (1V/RILIM) × 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 500mA.
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. TS1 and TS2 pins have to be shorted together.
Temperature qualification voltage input #2. TS1 and TS2 pins have to be shorted together.
Battery connection point to the positive terminal of the battery pack. The internal BATFET is connected between BAT and
SYS. Connect a 10uF closely to the BAT pin.
System connection point. The internal BATFET is connected between BAT and SYS. When the battery falls below the
minimum system voltage, switch-mode converter keeps SYS above the minimum system voltage. (Refer to Application
Information Section for inductor and capacitor selection)
Copyright © 2012, Texas Instruments Incorporated
Product Folder Links: bq24195 bq24195L
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