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LM5025BSD PDF预览

LM5025BSD

更新时间: 2024-11-04 04:20:07
品牌 Logo 应用领域
美国国家半导体 - NSC 控制器
页数 文件大小 规格书
16页 709K
描述
Active Clamp Voltage Mode PWM Controller

LM5025BSD 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:5 X 5 MM, LLP-16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.12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:100 V最小输入电压:13 V
标称输入电压:48 VJESD-30 代码:S-XQCC-N16
JESD-609代码:e0长度:5 mm
湿度敏感等级:1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最大输出电流:3 A
封装主体材料:UNSPECIFIED封装代码:HVQCCN
封装等效代码:SOLCC16,.2,20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
认证状态:Not Qualified座面最大高度:0.8 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:440 kHz
温度等级:AUTOMOTIVE端子面层:Tin/Lead (Sn/Pb)
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:40
宽度:5 mmBase Number Matches:1

LM5025BSD 数据手册

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March 2006  
LM5025B  
Active Clamp Voltage Mode PWM Controller  
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), soft-  
start, oscillator UP/DOWN sync capability, precision refer-  
ence and thermal shutdown.  
General Description  
The LM5025B is a functional variant of the LM5025 active  
clamp PWM controller. The functional differences of the  
LM5025B are as follows:  
The maximum PWM duty cycle is limited to less than  
75% to reduce voltage stress on the power MOSFETs.  
Features  
The CS2 hiccup mode threshold is increased to 0.5V  
The CS2 filter discharge device is disabled  
n Internal start-up bias regulator  
n 3A compound main gate driver  
n Programmable line under-voltage lockout (UVLO) with  
adjustable hysteresis  
The VCC regulator continues to operate when the line  
UVLO is below the threshold of normal operation  
The VREF regulator is switched off when the line UVLO  
input falls below the operating threshold  
n Voltage mode control with feed-forward  
n Adjustable dual mode over-current protection  
n Programmable overlap or deadtime between the main  
and active clamp outputs  
n Volt x Second maximum duty cycle clamp  
n Programmable soft-start  
n Current sense leading edge blanking  
n Single resistor programmable oscillator  
n Oscillator up / down sync capability  
n Precision 5V reference  
The internal 5kCOMP 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 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 de-  
signed for high-speed operation including an oscillator fre-  
quency range up to 1MHz and total PWM and current sense  
propagation delays less than 100ns.  
n Thermal shutdown  
Packages  
n TSSOP-16  
n LLP-16 (5x5 mm) Thermally Enhanced  
Typical Application Circuit  
20141101  
Simplified Active Clamp Forward Power Converter  
© 2006 National Semiconductor Corporation  
DS201411  
www.national.com  

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