VBUS

PMID

D+

D-

STAT

SDA

SCL

INT

OTG

CE

SW

BTST

REGN

PGND

SYS

BAT

ILIM

TS1

TS2

VREF

SYS: 3.5V- 4.3V

Host

REGN

USB

REGN

bq24190

Thermal Pad

4.2V Battery

VBUS

PMID

D+

D-

STAT

SDA

SCL

INT

OTG

SW

BTST

REGN

PGND

SYS

BAT

ILIM

TS1

TS2

VREF

SYS: 3.5V-

Host

REGN

USB

REGN

bq24190

Thermal Pad

4.2V Battery

bq24190

SLUSAW5

– JANUARY 2012

www.ti.com

DESCRIPTION (CONTINUED)

The bq24190 can initiate a new charging cycle without host control. It charges the battery in three phases:

pre-conditioning, constant current, and constant voltage. In the end, the charger automatically terminates when

the charge current is below a preset limit in the constant voltage phase. Later on, when the battery voltage falls

below the recharge threshold, the charger automatically starts another charging cycle.

The bq24190 provides various safety features for battery charging and system operation, including dual pack

negative thermistor monitoring, charging safety timer, and over-voltage/over-voltage protections. The thermal

regulation reduces charge current when the junction temperature exceeds 120

°C (programmable).

The STAT output reports the charging status and any fault conditions. The INT immediately notifies the host

bq2419x FAMILY TABLE

bq24190

bq24191

bq24192

bq24192I

6BH

6AH

6BH

6BH

USB OTG

Yes

No

Yes

Yes

USB Detection

D+/D-

PSEL

PSEL

PSEL

Default Battery Voltage

4.2V

4.2V

4.2V

4.1V

Default Charge Current

2A

2A

2A

1A

Maximum Pre-Charge Current

2A

2A

2A

640mA

Status Output

STAT

STAT, /PG

STAT, /PG

STAT, /PG

STAT During Fault

Blinking at 1Hz

Blinking at 1Hz

Blinking at 1Hz

10k to ground

APPLICATION DIAGRAM

2

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Copyright

© 2012, Texas Instruments Incorporated

Product Folder Link(s) :bq24190