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BQ24740

更新时间： 2024-01-08 18:38:22
品牌 Logo 应用领域
德州仪器 - TI 电池
页数 文件大小 规格书
32页 1256K
描述
Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect

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中文翻译

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BQ24740 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Obsolete零件包装代码：QFN
包装说明：5 X 5 MM, GREEN, PLASTIC, QFN-28针数：28
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.8Is Samacsys：N
可调阈值：YES模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：S-PQCC-N28JESD-609代码：e4
长度：5 mm湿度敏感等级：2
信道数量：1功能数量：1
端子数量：28最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC28,.2SQ,20
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260电源：7/24 V
认证状态：Not Qualified座面最大高度：1 mm
子类别：Power Management Circuits最大供电电压 (Vsup)：24 V
最小供电电压 (Vsup)：5 V标称供电电压 (Vsup)：20 V
表面贴装：YES技术：MOS
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

BQ24740 数据手册

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bq24740  
www.ti.com  
SLUS736–DECEMBER 2006  
Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect  
FEATURES  
APPLICATIONS  
•
•
•
•
•
•
Notebook and Ultra-Mobile Computers  
Portable Data-Capture Terminals  
Portable Printers  
Medical Diagnostics Equipment  
Battery Bay Chargers  
•
•
•
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  
The bq24740 is  
a high-efficiency, synchronous  
±3% Adapter Current Accuracy  
±2% Input Current Sense Amp Accuracy  
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 very high regulation  
accuracies, and can be either hardwired with  
•
•
Integration  
–
–
Internal Loop Compensation  
Internal Soft Start  
Safety  
resistors  
or  
programmed  
by  
the  
system  
–
–
Input Overvoltage Protection (OVP)  
power-management microcontroller using a DAC or  
GPIOs.  
Dynamic Power Management (DPM) with  
Status Indicator  
The bq24740 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.  
–
Reverse-Conduction Protection Input FET  
•
•
•
Supports Two, Three, or Four Li+ Cells  
5 – 24 V AC/DC-Adapter Operating Range  
Analog Inputs with Ratiometric Programming  
via Resistors or DAC/GPIO Host Control  
–
–
Charge Voltage (4-4.512 V/cell)  
28 27 26 25 24 23 22  
Charge Current (up to 10 A, with 10-mΩ  
sense resistor)  
1
2
3
4
5
6
7
21  
20  
19  
18  
17  
16  
15  
CHGEN  
ACN  
DPMDET  
CELLS  
SRP  
–
Adapter Current Limit (DPM)  
bq24740  
28 LD QFN  
TOP VIEW  
ACP  
•
Status and Monitoring Outputs  
LPMD  
ACDET  
ACSET  
LPREF  
SRN  
–
AC/DC Adapter Present with  
Programmable Voltage Threshold  
BAT  
SRSET  
IADAPT  
–
Low Input-Power Detect with Adjustable  
Threshold and Hysteresis  
8
9
10 11 12 13 14  
–
–
DPM Loop Active  
Current Drawn from Input Source  
•
•
Battery Discharge Current Sense with No  
Adapter, or Selectable Low-Iq mode  
Supports Any Battery Chemistry: Li+, NiCd,  
NiMH, Lead Acid, etc.  
•
•
•
Charge Enable  
10-µA Off-State Current  
28-pin, 5x5-mm QFN package  
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 © 2006, Texas Instruments Incorporated  
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中文翻译

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BQ24740 替代型号

型号 品牌 替代类型 描述 数据表
BQ24704 TI

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