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BQ24616_1

更新时间： 2024-11-25 11:53:19
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德州仪器 - TI 电池开关
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36页 1716K
描述
JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

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BQ24616_1 数据手册

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bq24616  
www.ti.com  
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 Iq  
Check for Samples: bq24616  
1
FEATURES  
•
Energy Star Low Quiescent Current Iq  
•
•
•
•
Battery Thermistor Sense for JEITA Guideline  
Compatible Charger  
–
–
< 15 µA Off-State Battery Discharge current  
< 1.5 mA Off-State Input Quiescent Current  
600 kHz NMOS-NMOS Synchronous Buck  
Converter  
APPLICATIONS  
•
Netbook, Mobile Internet Device and  
Ultra-Mobile PC  
Industrial and Medical Equipment  
Personal Digital Assistants  
Handheld Terminals  
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  
Portable Equipment  
–
–
–
±0.5% Charge Voltage Accuracy  
±3% Charge Current Accuracy  
±3% Adapter Current Accuracy  
DESCRIPTION  
The bq24616 is highly integrated, JEITA (Japan  
Electronic Information Technology Association)  
•
•
Integration  
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  
–
Automatic System Power Selection from  
Adapter or Battery  
–
–
–
Internal Loop Compensation  
Internal Soft Start  
voltage  
regulation,  
charge  
preconditioning,  
termination, adapter current regulation, and charge  
status monitoring.  
Dynamic Power Management  
Safety Protection  
The bq24616 charges the battery in three phases:  
preconditioning, constant current, and constant  
voltage. Charge is terminated when the current  
–
–
–
–
–
–
–
–
Input Over-Voltage Protection  
Battery Detection  
reaches  
a
minimum user-selectable level.  
A
Reverse Protection Input FET  
Programmable Safety Timer  
Charge Over-Current Protection  
Battery Short Protection  
Battery Over-Voltage Protection  
Thermal Shutdown  
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  
•
Status Outputs  
–
–
Adapter Present  
24 23  
22 21  
20  
19  
Charger Operation Status  
18  
17  
1
2
REGN  
GND  
ACN  
ACP  
•
•
Charge Enable Pin  
QTJ  
6 V Gate Drive for Synchronous Buck  
Converter  
16  
15  
14  
13  
3
4
5
6
ACDRV  
CE  
ACSET  
ISET2  
SRP  
QFN-24  
TOP VIEW  
STAT1  
TS  
•
•
30 ns Driver Dead-time and 99.5% Max  
Effective Duty Cycle  
24-pin, 4×4-mm2 QFN Package  
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  
1234567...36

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