BQ24192 datasheet(5/53 Pages) TI2

5 / 53 page

bq24190, bq24192, bq24192I

www.ti.com

SLUSAW5B – JANUARY 2012 – REVISED DECEMBER 2014

Pin Functions (continued)

NUMBER

TYPE

DESCRIPTION

bq24192

bq24190

bq24192I

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 IINMAX = (1V/RILIM) × 530. The actual input current limit is the

ILIM

Analog

lower one set by ILIM and by I2C REG00[2:0]. The minimum input current programmed on ILIM pin is 500 mA.

Temperature qualification voltage input #1. Connect a negative temperature coefficient thermistor. Program

TS1

temperature window with a resistor divider from REGN to TS1 to GND. Charge suspends when either TS pin is

Analog

out of range. Recommend 103AT-2 thermistor.

Temperature qualification voltage input #2. Connect a negative temperature coefficient thermistor. Program

TS2

temperature window with a resistor divider from REGN to TS2 to GND. Charge suspends when either TS pin is

Analog

out of range. Recommend 103AT-2 thermistor.

Battery connection point to the positive terminal of the battery pack. The internal BATFET is connected

BAT

13,14

between BAT and SYS. Connect a 10 µF closely to the BAT pin.

System connection point. The internal BATFET is connected between BAT and SYS. When the battery falls

SYS

15,16

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.)

Power ground connection for high-current power converter node. Internally, PGND is connected to the source

of the n-channel LSFET. On PCB layout, connect directly to ground connection of input and output capacitors

PGND

17,18

of the charger. A single point connection is recommended between power PGND and the analog GND near the

IC PGND pin.

Switching node connecting to output inductor. Internally SW is connected to the source of the n-channel

19,20

HSFET and the drain of the n-channel LSFET. Connect the 0.047-µF bootstrap capacitor from SW to BTST.

Analog

PWM high side driver positive supply. Internally, the BTST is connected to the anode of the boost-strap diode.

BTST

Connect the 0.047-µF bootstrap capacitor from SW to BTST.

PWM low side driver positive supply output. Internally, REGN is connected to the cathode of the boost-strap

REGN

diode. Connect a 4.7-µF (10-V rating) ceramic capacitor from REGN to analog GND. The capacitor should be

placed close to the IC. REGN also serves as bias rail of TS1 and TS2 pins.

Connected to the drain of the reverse blocking MOSFET and the drain of HSFET. Given the total input

PMID

capacitance, connect a 1-µF capacitor on VBUS to PGND, and the rest all on PMID to PGND. (Refer to

Analog

Application Information Section for details)

Thermal

Exposed pad beneath the IC for heat dissipation. Always solder thermal pad to the board, and have vias on the

–

Pad

thermal pad plane star-connecting to PGND and ground plane for high-current power converter.

8 Specifications

8.1 Absolute Maximum Ratings

(1)

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

VBUS

–2

PMID

–0.3

STAT, PG

–0.3

BTST

–0.3

Voltage range (with

–2

respect to GND)

BAT, SYS (converter not switching)

–0.3

SDA, SCL, INT, OTG, ILIM, REGN, TS1, TS2, CE, PSEL, D+, D–

–0.3

BTST TO SW

–0.3

–7

PGND to GND

–0.3

Output sink current

INT, STAT, PG

Junction temperature

–40°C

150

°C

Storage temperature, Tstg

–65

150

°C

(1)

Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage

values are with respect to the network ground terminal unless otherwise noted.

Submit Documentation Feedback

Product Folder Links: bq24190 bq24192 bq24192I

BQ24192 Datasheet(PDF) 5 Page - Texas Instruments

BQ24192 Datasheet(HTML) 5 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

Datasheet Download

Link URL