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TPS61251DSGT PDF预览

TPS61251DSGT

更新时间： 2024-01-18 23:15:35
品牌 Logo 应用领域
德州仪器 - TI 转换器电池升压转换器
页数 文件大小 规格书
21页 425K
描述
BOOST CONVERTER FOR BATTERY BACKUP CHARGING WITH ADJUSTABLE CONSTANT CURRENT AND SNOOZE MODE

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中文翻译

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TPS61251DSGT 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SON
包装说明：HVSON, SOLCC8,.08,20针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：0.87其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 3 TO 6.5V; PFM CONTROL TECHNIQUE ALSO POSSIBLE
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：6 V
最小输入电压：2.3 V标称输入电压：3.6 V
JESD-30 代码：S-PDSO-N8JESD-609代码：e4
长度：2 mm湿度敏感等级：2
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电压：6.5 V最小输出电压：3 V
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装等效代码：SOLCC8,.08,20封装形状：SQUARE
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers标称供电电压 (Vsup)：3.6 V
表面贴装：YES切换器配置：BOOST
最大切换频率：3500 kHz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：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：2 mm
Base Number Matches：1

TPS61251DSGT 数据手册

 浏览型号TPS61251DSGT的Datasheet PDF文件第2页浏览型号TPS61251DSGT的Datasheet PDF文件第3页浏览型号TPS61251DSGT的Datasheet PDF文件第4页浏览型号TPS61251DSGT的Datasheet PDF文件第5页浏览型号TPS61251DSGT的Datasheet PDF文件第6页浏览型号TPS61251DSGT的Datasheet PDF文件第7页 
TPS61251  
www.ti.com  
SLVSAF7 –SEPTEMBER 2010  
BOOST CONVERTER FOR BATTERY BACKUP CHARGING WITH ADJUSTABLE  
CONSTANT CURRENT AND SNOOZE MODE  
Check for Samples: TPS61251  
1
FEATURES  
•
Load Disconnect and Reverse Current  
Protection  
•
Resistor Programmable Input Current Limit  
•
•
•
Short Circuit Protection  
–
–
±10% Current Accuracy at 500mA over Full  
Temperature Range  
Typical Operating Frequency 3.5 MHz  
Available in a 2×2-mm QFN-8 Package  
Programmable from 100mA up to 1500mA  
•
•
Snooze Mode Draws Only 2 mA (typ.)  
Quiescent Current  
APPLICATIONS  
•
Current Limited Applications With High Peak  
Power Loads (SSD, PCMCIA Tx Bursts,  
Memory, GPRS/GSM Tx)  
Designed to Charge Large Capacitor Values in  
the Farad Range  
•
•
Up to 92% Efficiency  
•
•
•
•
Li-Ion Applications  
Battery Backup Applications  
Audio Applications  
RF-PA Buffer  
Power Good Indicates Appropriate Output  
Voltage Level even in Shut Down  
•
•
•
VIN Range from 2.3V to 6.0V  
Adjustable Output Voltage up to 6.5V  
100% Duty-Cycle Mode When VIN > VOUT  
DESCRIPTION  
The TPS61251 device provides a power supply solution for products powered by either a three-cell, NiCd or  
NiMH battery, or a one-cell Li-Ion or Li-polymer battery. The wide input voltage range is ideal to power portable  
applications like mobile phones, solid state drives (SSD) and wireless modems. The converter is designed to  
charge large capacitors in the Farad range to support battery back up applications. During capacitor charging the  
TPS61251 is working as a constant current source until VOUT has reached its programmed value. The charge  
current can be programmed by an external resistor RILIM and provides a ±10% accuracy for the average input  
current limit.  
The TPS61251 in combination with a reservoir capacitor allows the converter to provide high current pules that  
would exceed the capability of the suppling circuit (PC slot, USB) and keeps the slot power safely within its  
capabilities. During light loads the device will automatically enters an enhanced power save mode (Snooze  
Mode), which allows the converter to maintain the required output voltage, while only drawing 2 mA from the  
battery. This will allow maximum efficiency at lowest quiescent currents.  
TPS61251 allows the use of small inductors and input capacitors to achieve a small solution size. During  
shutdown, the load is completely disconnected from the battery and will not discharge either the battery nor the  
charged bulk capacitor. The TPS61251 is available in a 8-pin QFN package measuring 2×2 mm (DSG).  
L1  
VOUT  
L
VOUT  
1 μH  
5.5 V  
VIN  
R1  
1 MΩ  
CFF  
1 nF  
VIN  
EN  
COUT  
4.7 µF  
CBULK  
>150 µF  
2.3 V to  
6.0 V  
C1  
10 µF  
FB  
R4  
1 MΩ  
R2  
280 kΩ  
ILIM  
RILIM  
20 kΩ  
Power Good  
Output  
GND  
PG  
TPS61251  
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  
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中文翻译

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TPS61251DSGT 替代型号

型号 品牌 替代类型 描述 数据表
TPS61251DSGR TI

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 BOOST CONVERTER FOR BATTERY BACKUP CHARGING WITH ADJUSTABLE CONSTANT CURRENT AND SNOOZE MO

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