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FEATURES

DESCRIPTION

APPLICATIONS

5

6

7

8

19

3

AC

USB

SW

VSS

STAT1

STAT2

13

12

ISET2

ISET1

bq25012RHL

PACK+

PACK−

VDC

GND

VBUS

GND

D+

D −

USB Port

AC Adapter

15

CE

2

FB

16

BAT/OUT

+

DSP

Processor

Bluetooth Chipset

Battery

Pack

1.8 V

17

BAT/OUT

9

18

VSS

VSS

EN

4

20

FPWM

UDG−04070

14

PG

bq25010

bq25011

bq25012

SLUS615 – DECEMBER 2004

SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR BLUETOOTH HEADSETS

AND OTHER PORTABLE APPLICATIONS (bqHYBRID™)

•

Li-Ion Or Li-Pol Charge Management and

The bqHYBRID™ series are highly integrated charge

Synchronous DC-DC Power Conversion In a

and

power

management

devices

targeted

at

Single Chip

space-limited bluetooth applications. The bqHYBRID

series offer integrated power FET and current sensor

•

Optimized for Powering Bluetooth Headsets

for charge control, reverse blocking protection, high

and Accessories

accuracy current and voltage regulation, charge

•

Charges and Powers the System from Either

status, charge termination, and a highly efficient and

the AC Adapter or USB with Autonomous

low-power dc-dc converter in a small package.

Power Source Selection

The bqHYBRID charges the battery in three phases:

•

Integrated USB Charge Control with

conditioning, constant current and constant voltage.

Selectable 100 mA and 500 mA Charge Rates

Charge is terminated based on minimum current. An

•

Integrated Power FET and Current Sensor for

internal charge timer provides a backup safety feature

for charge termination. The bqHYBRID automatically

Up to 500 mA Charge Applications AND

re-starts the charge if the battery voltage falls below

100 mA 1.8 V DC-DC Controller with

an internal threshold. The bqHYBRID automatically

Integrated FET

•

Reverse Leakage Protection Prevents Battery

The integrated low-power high-efficiency dc-dc con-

Drainage

verter

is

designed

to

operate

directly

from

a

•

Automatic Power Save Mode For High

single-cell Li-Ion or Li-Pol battery pack. The output

Efficiency at Low Current, or Forced PWM for

voltage is either adjustable from 0.7 V to VBAT

Frequency Sensitive Applications

(bq25010), fixed at 3.3 V (bq25011), or fixed at 1.8 V

(bq25012), and is capable of delivering up to 150-mA

of load current. The dc-dc converter operates at a

synchronized 1 MHz switching frequency allowing for

•

Bluetooth Headsets

the use of small inductors.

•

Bluetooth Accessories

•

Low-Power Handheld Devices

TYPICAL APPLICATION

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.

bqHYBRID is a trademark of Benchmark.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004, 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.