bq25010
bq25011
bq25012
www.ti.com
SLUS615–DECEMBER 2004
SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR BLUETOOTH HEADSETS
AND OTHER PORTABLE APPLICATIONS (bqHYBRID™)
FEATURES
DESCRIPTION
•
Li-Ion Or Li-Pol Charge Management and
Synchronous DC-DC Power Conversion In a
Single Chip
The bqHYBRID™ series are highly integrated charge
and power management devices targeted at
space-limited bluetooth applications. The bqHYBRID
series offer integrated power FET and current sensor
for charge control, reverse blocking protection, high
accuracy current and voltage regulation, charge
status, charge termination, and a highly efficient and
low-power dc-dc converter in a small package.
•
•
Optimized for Powering Bluetooth Headsets
and Accessories
Charges and Powers the System from Either
the AC Adapter or USB with Autonomous
Power Source Selection
The bqHYBRID charges the battery in three phases:
conditioning, constant current and constant voltage.
Charge is terminated based on minimum current. An
internal charge timer provides a backup safety feature
for charge termination. The bqHYBRID automatically
re-starts the charge if the battery voltage falls below
an internal threshold. The bqHYBRID automatically
enters sleep mode when VCC supply is removed.
•
•
Integrated USB Charge Control with
Selectable 100 mA and 500 mA Charge Rates
Integrated Power FET and Current Sensor for
Up to 500 mA Charge Applications AND
100 mA 1.8 V DC-DC Controller with
Integrated FET
•
•
Reverse Leakage Protection Prevents Battery
Drainage
The integrated low-power high-efficiency dc-dc con-
verter is designed to operate directly from
a
Automatic Power Save Mode For High
Efficiency at Low Current, or Forced PWM for
Frequency Sensitive Applications
single-cell Li-Ion or Li-Pol battery pack. The output
voltage is either adjustable from 0.7 V to VBAT
(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
the use of small inductors.
APPLICATIONS
•
•
•
Bluetooth Headsets
Bluetooth Accessories
Low-Power Handheld Devices
TYPICAL APPLICATION
Bluetooth Chipset
DSP
bq25012RHL
AC Adapter
VDC
PG 14
SW 19
1.8 V
5
3
9
AC
GND
VSS
VSS
FB
2
CE 15
BAT/OUT 17
BAT/OUT 16
ISET1 12
Battery
Pack
D+
D −
18 VSS
PACK+
PACK−
Processor
6
7
8
4
USB
VBUS
+
STAT1
STAT2
EN
R
SET
ISET2 13
GND
FPWM 20
USB Port
UDG−04070
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated