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SLUS892 – DECEMBER 2009
Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System
Power Selector and Low I
q
Check for Samples:
1
FEATURES
600 kHz NMOS-NMOS Synchronous Buck
Converter
Stand-alone Charger Support for Li-Ion or
Li-Polymer
5V–28V VCC Input Operating Range and
Support 1-6 Battery Cells (bq24610)
5V–24V VCC Input Operating Range and
Support 1-5 Battery Cells (bq24617)
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 Thermistor Sense Hot/Cold Charge
Suspend
– 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
6V Gate Drive for Synchronous Buck
Converter
30ns Driver Dead-time and 99.5% Max
Effective Duty Cycle
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24-pin, 4×4-mm
2
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
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Netbook, Mobile Internet Device and
Ultra-Mobile PC
Personal Digital Assistants
Handheld Terminals
Industrial and Medical Equipment
Portable Equipment
DESCRIPTION
The bq24610/7 is highly integrated 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 bq24610/7 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 bq24610/7 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
BATDRV
VCC
HIDRV
BTST
PH
20
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24
1
2
23
22
21
19
18
REGN
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ACN
ACP
ACDRV
3
CE
STAT1
TS
4
5
6
7
8
OAS
(bq24610)
OFB
(bq24617)
QFN-24
TOP VIEW
LODRV
17
GND
16
ACSET
15
ISET2
14
SRP
13
SRN
12
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9
10
11
TTC
PG
STAT2
ISET1
VREF
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 © 2009, Texas Instruments Incorporated
VFB
TI [ TEXAS INSTRUMENTS ]
