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BQ24085_15

更新时间： 2024-11-16 02:58:27
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德州仪器 - TI /
页数 文件大小 规格书
35页 1274K
描述
Single-Chip Li-Ion and Li-Pol Charge Management IC

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BQ24085_15 数据手册

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bq24085, bq24086  
bq24087, bq24088  
www.ti.com ............................................................................................................................................. SLUS784D–DECEMBER 2007–REVISED AUGUST 2009  
750 mA SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC  
WITH THERMAL REGULATION  
1
FEATURES  
DESCRIPTION  
•
Ideal for Low-Dropout Designs for Single-Cell  
Li-Ion or Li-Pol Packs in Space Limited  
Applications  
The bq24085/6/7/8 series are highly integrated Li-Ion  
and Li-Pol linear chargers, targeted at space-limited  
portable applications. The bq24085/6/7/8 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  
•
•
Integrated Power FET and Current Sensor for  
up to 750-mA Charge Applications  
Reverse Leakage Protection Prevents Battery  
Drainage  
•
•
•
±0.5% Voltage Regulation Accuracy  
based  
on  
minimum  
current.  
An  
internal  
Thermal Regulation Maximizes Charge Rate  
programmable charge timer provides a backup safety  
feature for charge termination and is dynamically  
adjusted during the thermal regulation phase. The  
bq24085/6/7/8 automatically restarts 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 bq24085/6/7/8 in cradle  
chargers or in the end equipment, while using low  
cost or high-end AC adapters.  
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  
Pin Out  
(Top View)  
•
•
Small 3×3 mm MLP Package  
Selectable Battery Insertion and Battery  
Absent Detection  
bq24085  
•
Input Overvoltage Protection  
10  
9
1
2
OUT  
BAT  
CE  
IN  
–
6.5 V and 10.5 V Options  
TMR  
8
7
6
3
4
5
STAT1  
STAT2  
VSS  
APPLICATIONS  
•
•
PG  
PDA, MP3 Players, Digital Cameras  
Internet Appliances and Handheld Devices  
ISET  
TYPICAL APPLICATION CIRCUIT  
Li-Ion or Li-Pol  
Battery Pack  
bq24085  
Input Power  
1
2
10  
Pack+  
+
IN  
OUT  
RTMR  
C2  
1 mF  
C3  
4.7 mF  
TMR  
9
8
R1  
1.5 kW  
R2  
1.5 kW  
BAT  
CE  
49.9 kW  
Pack-  
RED  
3
STAT1  
7
6
GREEN  
4
5
PG  
STAT2  
Vss  
ISET  
R
SET  
1.13 kW  
Charge Enable  
and Power Good  
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 © 2007–2009, Texas Instruments Incorporated  
1234567...35

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