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LM5021-Q1

更新时间： 2024-11-24 01:10:51
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德州仪器 - TI /
页数 文件大小 规格书
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描述
LM5021-Q1 AC-DC Current-Mode PWM Controller

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中文翻译

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LM5021-Q1 数据手册

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Sample &  
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Support &  
Community  
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Folder  
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Technical  
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LM5021-Q1  
SNVSA90 –DECEMBER 2014  
LM5021-Q1 AC-DC Current-Mode PWM Controller  
1 Features  
2 Applications  
1
•
•
Qualified for Automotive Applications  
•
•
•
•
•
DCM/CCM Flyback Converters  
AEC-Q100 Qualified With the Following Results:  
Industrial Power Conversion  
SMPS for Smart Meters and Audio Amplifiers  
Building Automation and White Goods SMPS  
Isolated Telecom Power Supplies  
–
Device Temperature Grade 1: –40°C to 125°C  
Ambient Operating Temperature Range  
–
–
Device HBM Classification Level 2: ±2 kV  
Device CDM Classification Level C4B: 750 V  
3 Description  
•
•
•
•
•
•
•
•
•
Ultra-low Startup Current (25 µA Maximum)  
Current Mode Control  
The LM5021 off-line pulse width modulation (PWM)  
controller contains all of the features needed to  
implement highly efficient off-line single-ended  
flyback and forward power converters using current-  
mode control. The LM5021 features include an ultra-  
low (25 µA) start-up current, which minimizes power  
losses in the high voltage start-up network. A skip  
cycle mode reduces power consumption with light  
loads for energy conserving applications (ENERGY  
STAR®, CECP, and so forth). Additional features  
include under-voltage lockout, cycle-by-cycle current  
limit, hiccup mode overload protection, slope  
Skip Cycle Mode for Low Standby Power  
Single Resistor Programmable Oscillator  
Synchronizable Oscillator  
Adjustable Soft-Start  
Integrated 0.7-A Peak Gate Driver  
Direct Opto-Coupler Interface  
Maximum Duty Cycle Limiting (80% for LM5021-1  
or 50% for LM5021-2)  
•
•
•
•
•
•
Slope Compensation (LM5021-1 Only)  
Undervoltage Lockout (UVLO) with Hysteresis  
Cycle-by-Cycle Overcurrent Protection  
Hiccup Mode for Continuous Overload Protection  
Leading Edge Blanking of Current Sense Signal  
Package: VSSOP-8  
compensation,  
soft-start  
and  
oscillator  
synchronization capability. This high performance 8-  
pin IC has total propagation delays less than 100 ns  
and a 1-MHz capable oscillator that is programmed  
with a single resistor.  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
LM5021-Q1  
VSSOP (8)  
3.00 mm × 3.00 mm  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
Simplified Application Diagram  
VOUT  
+
AC  
90 ~ 264 Vac  
VCC  
LM5021  
VIN  
RT  
SS  
OUT  
CS  
+
COMP GND  
FEEDBACK  
WITH  
ISOLATION  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
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LM5021-Q1 替代型号

型号 品牌 替代类型 描述 数据表
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