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BQ24753RHDR PDF预览

BQ24753RHDR

更新时间： 2024-11-29 06:44:11
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德州仪器 - TI 电池
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38页 2003K
描述
Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector

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BQ24753RHDR 数据手册

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bq24753  
www.ti.com........................................................................................................................................ SLUS885A–DECEMBER 2008–REVISED DECEMBER 2008  
Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector  
1
FEATURES  
APPLICATIONS  
•
•
•
•
•
•
Notebook and Ultra-Mobile Computers  
Portable Data Capture Terminals  
Portable Printers  
Medical Diagnostics Equipment  
Battery Bay Chargers  
2
•
NMOS-NMOS Synchronous Buck Converter  
with 300 kHz Frequency and >95% Efficiency  
•
•
30-ns Minimum Driver Dead-time and 99.5%  
Maximum Effective Duty Cycle  
High-Accuracy Voltage and Current Regulation  
Battery Back-up Systems  
–
–
–
–
±0.5% Charge Voltage Accuracy  
±3% Charge Current Accuracy  
DESCRIPTION  
±3% Adapter Current Accuracy  
±2% Input Current Sense Amp Accuracy  
The bq24753 is  
a high-efficiency, synchronous  
battery charger with integrated compensation and  
system power selector logic, offering low component  
count for space-constrained multi-chemistry battery  
charging applications. Ratiometric charge current and  
voltage programming allows for high regulation  
accuracies, and can be either hardwired with resistors  
or programmed by the system power-management  
microcontroller using a DAC or GPIOs.  
•
•
Integration  
–
Automatic System Power Selection From  
AC/DC Adapter or Battery  
Internal Loop Compensation  
Internal Soft Start  
–
–
Safety  
–
Programmable Input Overvoltage  
Protection (OVP)  
The bq24753 charges two, three, or four series Li+  
cells, supporting up to 10 A of charge current, and is  
available in a 28-pin, 5x5-mm thin QFN package.  
–
–
Dynamic Power Management (DPM)  
Programmable Inrush Adapter Power  
(ACOP) and Overcurrent (ACOC) Limits  
–
Reverse-Conduction Protection Input FET  
•
•
•
Supports Two, Three, or Four Li+ Cells  
5 – 24 V AC/DC-Adapter Operating Range  
27 26 25 24 23 22  
28  
1
2
CHGEN  
ACN  
LEARN  
20 CELLS  
SRP  
19  
21  
Analog Inputs with Ratiometric Programming  
via Resistors or DAC/GPIO Host Control  
bq24753  
28 LD QFN  
TOP VIEW  
ACP  
3
4
5
6
–
–
Charge Voltage (4-4.512 V/cell)  
ACDRV  
ACDET  
ACSET  
ACOP  
18 SRN  
Charge Current (up to 10 A, with 10-mΩ  
BAT  
17  
Sense Resistor)  
16 SRSET  
–
Adapter Current Limit (DPM)  
IADAPT  
15  
7
•
Status and Monitoring Outputs  
8
9
10 11 12 13 14  
–
AC/DC Adapter Present with Programmable  
Voltage Threshold  
–
Current Drawn from Input Source  
•
•
Battery Learn Cycle Control  
Supports Any Battery Chemistry: Li+, NiCd,  
NiMH, Lead Acid, etc.  
•
•
•
Charge Enable  
28-pin, 5x5-mm QFN package  
Energy Star Low Iq  
–
–
< 10 µA Off-State Battery Discharge Current  
1
< 1.5 mA Off-State Input Quiescent Current  
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.  
2
All trademarks are the property of their respective owners.  
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 © 2008, Texas Instruments Incorporated  
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BQ24753RHDR 替代型号

型号 品牌 替代类型 描述 数据表
BQ24753RHDT TI

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 Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector
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