BQ24600_1 Datasheet, PDF (1/31 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with Low Iq

bq24600
www.ti.com
SLUS891 – FEBRUARY 2010
Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with Low I_q
Check for Samples: bq24600
FEATURES
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• 1.2 MHz NMOS-NMOS Synchronous Buck
Converter
• Stand-alone Charger Support for Li-Ion or
Li-Polymer
• 5V-28V VCC Input Voltage Range and Support
1-6 Battery Cells
• Up to 10A Charge Current and Adapter Current
• High-Accuracy Voltage and Current Regulation
– ±0.5% Charge Voltage Accuracy
– ±3% Charge Current Accuracy
• Integration
– Internal Loop Compensation
– Internal Soft Start
• Safety
– Input Over-Voltage Protection
– Battery Thermistor Sense Hot/Cold Charge
Suspend
– Battery Detection
– Built-in Safety Timer
– Charge Over-Current Protection
– Battery Short Protection
– Battery Over-Voltage Protection
– Thermal Shutdown
• Status Outputs
– Adapter Present
– Charger Operation Status
• Charge Enable Pin
• 6V Gate Drive for Synchoronous Power
Converter
• 30ns Driver Dead-time and 99.5% Max
Effective Duty Cycle
• 16-pin 3.5×3.5 mm² QFN package
• Energy Star Low Quiescent Current I_q
– < 15 mA Off-State Battery Discharge current
– < 1.5 mA Off-State Input Quiescent Current
APPLICATIONS
• Netbook, Mobile Internet Device, and
Ultra-Mobile PC
• Personal Digital Assistants
• Handheld Terminals
• Industrial and Medical Equipment
• Portable Equipment
DESCRIPTION
The bq24600 is highly integrated Li-ion or Li-polymer
switch-mode battery charge controller. It offers a
constant-frequency synchronous PWM controller with
high accuracy charge current and voltage regulation,
charge preconditioning, termination, and charge
status monitoring,
The bq24600 charges the battery in three phases:
preconditioning, constant current, and constant
voltage. Charge is terminated when the current
reaches a minimum level. An internal charge timer
provides a safety backup. The bq24600 automatically
restarts the charge cycle if the battery voltage falls
below an internal threshold, and enters a
low-quiescent current sleep mode when the input
voltage falls below the battery voltage.
PACKAGE AND PIN-OUT
OAQ
(bq24600)
QFN-16
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2010, Texas Instruments Incorporated