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LM5027 PDF预览

LM5027

更新时间: 2024-01-26 20:01:07
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
26页 529K
描述
Voltage Mode Active Clamp Controller

LM5027 技术参数

是否无铅:含铅是否Rohs认证:符合
生命周期:Obsolete包装说明:GREEN, WQFN-24
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.71
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-XQCC-N24
JESD-609代码:e3长度:5 mm
湿度敏感等级:1功能数量:1
端子数量:24最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:0.015 A
封装主体材料:UNSPECIFIED封装代码:HVQCCN
封装等效代码:LCC24,.16X.2,20封装形状:RECTANGULAR
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:220 kHz
温度等级:AUTOMOTIVE端子面层:Matte Tin (Sn)
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:4 mmBase Number Matches:1

LM5027 数据手册

 浏览型号LM5027的Datasheet PDF文件第2页浏览型号LM5027的Datasheet PDF文件第3页浏览型号LM5027的Datasheet PDF文件第4页浏览型号LM5027的Datasheet PDF文件第5页浏览型号LM5027的Datasheet PDF文件第6页浏览型号LM5027的Datasheet PDF文件第7页 
August 18, 2009  
LM5027  
Voltage Mode Active Clamp Controller  
General Description  
Features  
The LM5027 pulse-width modulation (PWM) controller con-  
tains all of the features necessary to implement power con-  
verters 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. Three control out-  
puts are provided: the main power switch control (OUTA), the  
active clamp switch control (OUTB), and secondary side syn-  
chronous rectifier control (OUTSR). The timing between the  
control outputs is adjustable with external resistors that pro-  
gram internal precision timers. This controller is designed for  
high-speed operation including an oscillator frequency range  
up to 1 MHz and total PWM propagation delays less than 50  
ns. The LM5027 includes a high-voltage startup regulator with  
a maximum input voltage rating of 105V. Additional features  
include Line Under Voltage Lockout (UVLO), separate soft-  
start of main and synchronous rectifier outputs, a timer for  
hiccup mode current limiting, a precision reference, and ther-  
mal shutdown.  
Voltage-Mode control  
Line feed-forward PWM ramp  
Internal 105V rated start-up bias regulator  
Programmable line Under-Voltage Lockout (UVLO) with  
adjustable hysteresis  
Versatile dual mode over-current protection  
Programmable volt-second limiter  
Programmable soft-start  
Programmable synchronous rectifier soft-start and stop  
Precise 500mV over-current comparator  
Current sense leading edge blanking  
Programmable oscillator with 1 MHz maximum frequency  
and synchronization capability  
Precision 5V reference  
Programmable time delays between outputs  
Packages  
eTSSOP-20  
Typical Application Circuit  
30099001  
Simplified Active Clamp Converter  
© 2009 National Semiconductor Corporation  
300990  
www.national.com  

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IC SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20, ROHS COMPLIANT, TSSOP-20, Sw