BQ2406X Datasheet, PDF (1/31 Pages) Texas Instruments – 1A SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC WITH THERMAL REGULATION

bq2406x
www.ti.com
1A SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC
WITH THERMAL REGULATION
SLUS689 – JUNE 2006
FEATURES
• Thermal Regulation Maximizes Charge Rate
• Ideal for Low-Dropout Designs for Single-Cell
Li-Ion or Li-Pol Packs in Space Limited
Applications
• Integrated Power FET and Current Sensor for
up to 1-A Charge Applications
• Reverse Leakage Protection Prevents Battery
Drainage
• ±0.5% Voltage Regulation Accuracy
• Charge Termination by Minimum Current and
Time
• Precharge Conditioning With Safety Timer
• Status Outputs for LED or System Interface
Indicate Charge, Fault, and Power Good
Outputs
• Short-Circuit and Thermal Protection
• Automatic Sleep Mode for Low Power
Consumption
• Small 3×3 mm MLP Package
• Selectable Battery Insertion and Battery
Absent Detection
• Input Over-Voltage Protection
APPLICATIONS
• PDA, MP3 Players, Digital Cameras
• Internet Appliances and Handheld Devices
DESCRIPTION
The bq2406x series are highly integrated Li-Ion and
Li-Pol linear chargers, targeted at space-limited
portable applications. The bq2406x series offers a
variety of safety features and functional options,
while still implementing a complete charging system
in a small package. The battery is charged in three
phases: conditioning, constant or thermally regulated
current, and constant voltage. Charge is terminated
based on minimum current. An internal
programmable charge timer provides a backup
safety feature for charge termination and is
dynamically adjusted during the thermal regulation
phase. The bq2406x automatically re-starts the
charge if the battery voltage falls below an internal
threshold; sleep mode is set when the external input
supply is removed. Multiple versions of this device
family enable easy design of the bq2406x in cradle
chargers or in the end equipment, while using low
cost or high-end AC adapters.
PINOUT
(TOP VIEW)
bq24061/66
IN ¹
TMR 2
STAT1 3
STAT2 4
V_SS 5
10 OUT
9 _BAT
8 _CE
7 _PG
6 _ISET
TYPICAL APPLICATION CIRCUIT
Input Power
4.7 mF 1.5 kW 1.5 kW
bq24061/66
Li-lon or Li-Pol
Battery Pack
1
RTMR ₂
49.9 kW
3
IN
TMR
STAT1
OUT ¹⁰
9
BAT
8
CE
R_BAT
200 Ω
Pack+
4.7 mF
+
Pack-
4
STAT2
5 _VSS
7
PG
ISET ⁶
RSET
1.13 kW
0.47 mF
Charge Enable and
Input Power Status
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.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated