VIN

VBUS

LED

VREG

CSIN

VREF

VBAT

OTG

SLRST

DIS

SW1

SW2

PMID1

PMID2

GND

SCL

STAT

SDA

HOST

BOOT1

BOOT2

100 nF

+

PACK-

PACK+

AC Adapter or

Wireless Power

USB Adapter

4.7 F

m

4.7 F

m

1 F

m

4.7 F

m

10 kW 10 kW

10 kW

10 kW

10 kW 10 kW

1 H

m

0.1 F

m

1 F

m

100 nF

1 H

m

68 mW

10 µF

47 µF

bq24140

www.ti.com

SLUSAO5

– OCTOBER 2011

Fully Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB

Compliance and USB-OTG Support

Check for Samples: bq24140

1

FEATURES

•

Programmable Charge Parameters Through

•

High-Efficiency Mini-USB/AC Battery Charger

– Input Current

for Single-Cell Li-Ion and Li-Polymer Battery

Packs

– Fast-Charge/Termination Current

•

Charge Battery and Provide USB-OTG Support

– Charge Voltage (3.5-4.44V)

at the Same Time

– Safety Timer with Reset Control

•

High-Accuracy Voltage and Current Regulation

– Safety Timer with Reset Control

– Input Current Regulation Accuracy: ±5%

– Termination Enable

(100mA, 500mA)

•

Synchronous Fixed-Frequency PWM

– Charge Voltage Regulation Accuracy:

Controller Operating at 3 MHz With 0% to

±0.5% (25°C), ±1% (0-125°C)

99.5% Duty Cycle

– Charge Current Regulation Accuracy: ±5%

•

Automatic High Impedance Mode for Low

•

Boost Mode Operation for USB OTG:

Power Consumption

– Input Voltage Range (from Battery): 2.3V to

•

Robust Protection

4.5V

– Reverse Leakage Protection Prevents

– Output for VBUS: 5.05V/500 mA

Battery Drainage

•

Input Voltage Based Dynamic Power

– Thermal Regulation and Protection

Management Provides Protection Against

– Input/Output Over Voltage Protection

Current Limited Adapters

•

Status Output for Charging and Faults

•

Bad Adaptor Detection and Rejection

•

USB Friendly Boot-Up Sequence

•

Safety Limit Register for Added Security by

•

2.35

× 2.65 mm 30-pin WCSP Package

Limiting Maximum Charge Voltage and

Maximum Charge Current

APPLICATIONS

•

20-V Absolute Maximum Input Voltage Rating

•

Mobile Phones and Smart Phones

•

9.0-V Maximum Operating Input Voltage

•

MP3 Players

•

Charge Faster than Linear Chargers

•

Handheld Devices

•

Built-in Input Current Sensing and Limiting

•

Integrated Power FETs for up to 1.5-A Charge

Rate

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.