BQ24616 Datasheet, PDF (1/34 Pages) Texas Instruments – JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

bq24616
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SLUSA49A – APRIL 2010 – REVISED MAY 2010
JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer
Battery Charger with System Power Selector and Low I_q
Check for Samples: bq24616
FEATURES
1
• Battery Thermistor Sense for JEITA Guideline
Compatible Charger
• 600 kHz NMOS-NMOS Synchronous Buck
Converter
• Stand-alone Charger Support for Li-Ion or
Li-Polymer
• 5 V–28 V VCC Input Operating Range and
Supports 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
– ±3% Adapter Current Accuracy
• Integration
– Automatic System Power Selection from
Adapter or Battery
– Internal Loop Compensation
– Internal Soft Start
– Dynamic Power Management
• Safety Protection
– Input Over-Voltage Protection
– Battery Detection
– Reverse Protection Input FET
– Programmable 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
• 6 V Gate Drive for Synchronous Buck
Converter
• 30 ns Driver Dead-time and 99.5% Max
Effective Duty Cycle
• 24-pin, 4×4-mm² QFN Package
• Energy Star Low Quiescent Current I_q
– < 15 µA Off-State Battery Discharge current
– < 1.5 mA Off-State Input Quiescent Current
APPLICATIONS
• Netbook, Mobile Internet Device and
Ultra-Mobile PC
• Industrial and Medical Equipment
• Personal Digital Assistants
• Handheld Terminals
• Portable Equipment
DESCRIPTION
The bq24616 is highly integrated, JEITA (Japan
Electronic Information Technology Association)
guideline compatible, Li-ion or Li-polymer
switch-mode battery charge controller. It offers a
constant-frequency synchronous switching PWM
controller with high accuracy charge current and
voltage regulation, charge preconditioning,
termination, adapter current regulation, and charge
status monitoring.
The bq24616 charges the battery in three phases:
preconditioning, constant current, and constant
voltage. Charge is terminated when the current
reaches a minimum user-selectable level. A
programmable charge timer provides a safety
backup. The bq24616 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
24 23 22 21 20 19
ACN ¹
18 REGN
ACP ²
ACDRV 3
CE 4
QTJ
QFN-24
TOP VIEW
17 GND
16 ACSET
15 ISET2
STAT1 5
14 SRP
TS 6
13 SRN
7 8 9 10 11 12
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.
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