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LM5027

更新时间： 2024-02-23 04:59:36
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
35页 1343K
描述
Voltage Mode Active Clamp Controller

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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 
LM5027A  
www.ti.com  
SNVS642B –APRIL 2010–REVISED MARCH 2013  
Voltage Mode Active Clamp Controller  
Check for Samples: LM5027A  
1
FEATURES  
DESCRIPTION  
The LM5027A is a functional variant of the LM5027  
active clamp PWM controller. The functional  
difference of the LM5027A is that the maximum duty  
cycle of the LM5027A is decreased from 91% to 71%.  
In addition, the oscillator timing equation has been  
modified.  
2
•
•
•
•
Voltage-Mode Control  
Line Feed-Forward PWM Ramp  
Internal 105V Rated Start-Up Bias Regulator  
Programmable Line Under-Voltage Lockout  
(UVLO) with Adjustable Hysteresis  
The LM5027A pulse-width modulation (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.  
Three control outputs are provided: the main power  
switch control (OUTA), the active clamp switch  
control (OUTB), and secondary side synchronous  
rectifier control (OUTSR). The timing between the  
control outputs is adjustable with external resistors  
that program 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  
LM5027A 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 thermal  
shutdown.  
•
•
Versatile Dual Mode Over-Current Protection  
Programmable Volt-Second Limiter and 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  
A 70% Maximum Duty Cycle  
Packages  
•
•
HTSSOP-20  
WQFN-24  
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 © 2010–2013, Texas Instruments Incorporated  
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