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LM5025CCMTE PDF预览

LM5025CCMTE

更新时间： 2024-11-26 05:42:23
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
16页 366K
描述
Active Clamp Voltage Mode PWM Controller

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中文翻译

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LM5025CCMTE 技术参数

生命周期：Transferred包装说明：SSOP,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.57
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：90 V最小输入电压：13 V
标称输入电压：48 VJESD-30 代码：R-PDSO-G16
长度：5 mm功能数量：1
端子数量：16最高工作温度：125 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH认证状态：Not Qualified
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：650 kHz温度等级：AUTOMOTIVE
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL宽度：4.4 mm
Base Number Matches：1

LM5025CCMTE 数据手册

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April 23, 2009  
LM5025C  
Active Clamp Voltage Mode PWM Controller  
General Description  
Features  
The LM5025C is a functional variant of the LM5025 active  
clamp PWM controller. The functional differences of the  
LM5025C are: The maximum duty cycle of the LM5025C is  
increased from 80% to 91%. The soft-start capacitor charging  
current is increased from 20 µA to 90 µA. The VCC regulator  
current limit threshold is increased from 25 mA to 55 mA. The  
CS1 and CS2 current limit thresholds have been increased to  
0.5V. The internal CS2 filter discharge device has been dis-  
abled and no longer operates each clock cycle. The internal  
VCC and VREF regulators continue to operate when the line  
UVLO pin is below threshold.  
Internal Start-up Bias Regulator  
■
■
3A Compound Main Gate Driver  
Programmable Line Under-Voltage Lockout (UVLO) with  
Adjustable Hysteresis  
■
Voltage Mode Control with Feed-Forward  
■
■
■
Adjustable Dual Mode Over-Current Protection  
Programmable Overlap or Deadtime between the Main  
and Active Clamp Outputs  
Volt x Second Clamp  
■
■
■
■
■
■
■
Programmable Soft-start  
The LM5025C 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 real-  
ized 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 100 ns. The LM5025C includes a high-voltage start-  
up regulator that operates over a wide input range of 13V to  
90V. Additional features include: Line Under Voltage Lockout  
(UVLO), softstart, oscillator UP/DOWN sync capability, pre-  
cision reference and thermal shutdown.  
Leading Edge Blanking  
Single Resistor Programmable Oscillator  
Oscillator UP / DOWN Sync Capability  
Precision 5V Reference  
Thermal Shutdown  
Packages  
TSSOP-16  
■
Typical Application Circuit  
30058901  
Simplified Active Clamp Forward Power Converter  
© 2009 National Semiconductor Corporation  
300589  
www.national.com  
1234567...16

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