BQ24150A Datasheet, PDF (1/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support

bq24150A
bq24151A
www.ti.com ..................................................................................................................................................................................................... SLUS931 – APRIL 2009
Fully Integrated Switch-Mode One-Cell Li-Ion Charger
With Full USB Compliance and USB-OTG Support
FEATURES
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•2 Charge Faster than Linear Chargers
• High-Accuracy Voltage and Current Regulation
– Input Current Regulation Accuracy: ±5%
(100 mA and 500 mA)
– Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0°C to 125°C)
– Charge Current Regulation Accuracy: ±5%
• High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
• 20-V Absolute Maximum Input Voltage Rating
• 6-V Maximum Operating Input Voltage
• Built-In Input Current Sensing and Limiting
• Integrated Power FETs for Up To 1.25-A
Charge Rate
• Programmable Charge Parameters through
I²C™ Interface (up to 3.4 Mbps):
– Input Current
– Fast-Charge/Termination Current
– Charge Voltage (3.5 V to 4.44 V)
– Safety Timer with Reset Control
– Termination Enable
• Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
• Robust Protection
– Reverse Leakage Protection Prevents
Battery Drainage
– Thermal Regulation and Protection
– Input/Output Overvoltage Protection
• Status Output for Charging and Faults
• Automatic High Impedance Mode for Low
Power Consumption
• USB Friendly Boot-Up Sequence
• Automatic Charging – bq24150A
• Automatic High Impedance Mode – bq24151A
• Boost Mode Operation for USB OTG:
– Input Voltage Range (from Battery): 2.5 V to
4.5 V
– Output for VBUS: 5.05 V/ 200 mA
• 2 x 2 mm 20-Pin WCSP Package
APPLICATIONS
• Mobile and Smart Phones
• MP3 Players
• Handheld Devices
DESCRIPTION
The bq24150A/1A is a compact, flexible,
high-efficiency, USB-friendly switch-mode charge
management device for single-cell Li-ion and
Li-polymer batteries used in a wide range of portable
applications. The charge parameters can be
programmed through an I²C interface. The
bq24150A/1A integrates a synchronous PWM
controller, power MOSFETs, input current sensing,
high-accuracy current and voltage regulation, and
charge termination, into a small WCSP package.
The bq24150A/1A charges the battery in three
phases: conditioning, constant current and constant
voltage. The input current is automatically limited to
the value set by the host. Charge is terminated based
on user-selectable minimum current level. A safety
timer with reset control provides a safety backup for
I²C interface. During normal operation, bq24150A/1A
automatically restarts the charge cycle if the battery
voltage falls below an internal threshold and
automatically enters sleep mode or high impedance
mode when the input supply is removed. The charge
status is reported to the host using the I²C interface.
TYPICAL APPLICATION CIRCUIT
VBUS
C IN
1 mF
VBUS
SW
U1
bq24150A/1A
VAUX
10 kW
SCL
SDA
STAT
10 kW
10 kW
OTG
10 kW
HOST
C IN
4.7 mF
I2C BUS
PMID
SCL
SDA
STAT
OTG
BOOT
PGND
CSIN
CSOUT
AUXPWR
VREF
LO 1.0 mH
C _BOOT
10nF
R _SNS
CO
1 0mF
0.1 mF
C _AUXPWR
C _VREF 1_mF
1 mF
PACK +
+
PACK -
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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.
I2C is a trademark of Philips Electronics.
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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 © 2009, Texas Instruments Incorporated