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LM5025BMTC/NOPB PDF预览

LM5025BMTC/NOPB

更新时间： 2024-11-27 11:12:55
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
26页 746K
描述
具有 P 或 N 沟道钳位 FET 和 75% 最大占空比的 90V 有源钳位电压模式 PWM 控制器 | PW | 16 | -40 to 125

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LM5025BMTC/NOPB 数据手册

 浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第2页浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第3页浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第4页浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第5页浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第6页浏览型号LM5025BMTC/NOPB的Datasheet PDF文件第7页 
LM5025B  
www.ti.com  
SNVS354B –JULY 2005–REVISED MARCH 2013  
LM5025B Active Clamp Voltage Mode PWM Controller  
Check for Samples: LM5025B  
1
FEATURES  
DESCRIPTION  
The LM5025B is a functional variant of the LM5025  
active clamp PWM controller. The functional  
differences of the LM5025B are as follows:  
2
•
•
•
Internal Start-Up Bias Regulator  
3A Compound Main Gate Driver  
Programmable Line Under-Voltage Lockout  
(UVLO) with Adjustable Hysteresis  
•
The maximum PWM duty cycle is limited to less  
than 75% to reduce voltage stress on the power  
MOSFETs.  
•
•
•
Voltage Mode Control with Feed-Forward  
•
The CS2 hiccup mode threshold is increased to  
0.5V  
Adjustable Dual Mode Over-Current Protection  
Programmable Overlap or Deadtime between  
the Main and Active Clamp Outputs  
•
•
The CS2 filter discharge device is disabled  
The VCC regulator continues to operate when the  
line UVLO is below the threshold of normal  
operation  
•
•
•
•
•
•
•
Volt x Second Maximum Duty Cycle Clamp  
Programmable Soft-Start  
Current Sense Leading Edge Blanking  
Single Resistor Programmable Oscillator  
Oscillator Up / Down Sync Capability  
Precision 5V Reference  
•
•
The VREF regulator is switched off when the line  
UVLO input falls below the operating threshold  
The internal 5kΩ COMP pin pull-up resistor is  
removed  
The LM5025B PWM controller contains all of the  
features necessary to implement power converters  
utilizing the Active Clamp / Reset technique. With the  
active clamp technique, higher efficiencies and  
greater power densities can be realized compared to  
conventional catch winding or RDC clamp / reset  
techniques. Two control outputs are provided, the  
main power switch control (OUT_A) and the active  
clamp switch control (OUT_B). The two internal  
compound gate drivers parallel both MOS and Bipolar  
devices, providing superior gate drive characteristics.  
This controller is designed for high-speed operation  
including an oscillator frequency range up to 1MHz  
and total PWM and current sense propagation delays  
less than 100ns.  
Thermal Shutdown  
PACKAGES  
•
•
TSSOP-16  
WSON-16 (5x5 mm) Thermally Enhanced  
The LM5025B includes  
a high-voltage start-up  
regulator that operates over a wide input range of  
13V to 100V. Additional features include: Line Under  
Voltage Lockout (UVLO), softstart, oscillator  
UP/DOWN sync capability, precision reference and  
thermal shutdown.  
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.  
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 © 2005–2013, Texas Instruments Incorporated  
1234567...26

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LM5025BMTC/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM5025BMTCX/NOPB TI

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