AC-DC Quasi-Resonant Current Mode PWM Controller - LM5023

LM5023 (ACTIVE)

AC-DC Quasi-Resonant Current Mode PWM Controller

Description

The LM5023 is a Quasi-Resonant Pulse Width Modulated (PWM) controller which contains all of the features needed to implement a highly efficient off-line power supply. The LM5023 uses the transformer auxiliary winding for demagnetization detection to ensure Critical Conduction Mode (CCM) operation. The LM5023 features a hiccup mode for over current protection with an auto restart to reduce the stress on the power components during an overload. A skip cycle mode which reduces power consumption at light loads for energy conservation applications (ENERGY STAR®, CEPCP, etc.). The LM5023 also uses the transformer auxiliary winding for output overvoltage (OVP) protection, if an OVP fault is detected the LM5023 latches off the controller.

Features

  • Critical Conduction Mode
  • Peak Current Mode Control Mode
  • Skip Cycle Mode for Low Standby Power
  • Hiccup Mode for Continuous Overload Protection
  • Cycle-by-Cycle Over-Current Protection Maintains
    Accuracy over the Universal AC Line
  • Line Current Feed Forward
  • OVP Protection by Sensing the Aux Winding
  • Integrated 0.7 A Peak Gate Driver
  • Direct Opto-Coupler Interface
  • Leading Edge Blanking of Current Sense Signal
  • Maximum Frequency Clamp 130 kHz
  • Programmable Soft Start
  • Thermal Shutdown
  • 8-Pin MSOP Package

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Parametrics Compare all products in Flyback Controller

 
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Special Features
Operating Temperature Range (C)
Package Group
Rating
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
LM5023 UCC28600 UCC28610 UCC28630 UCC28631 UCC28632 UCC28633 UCC28710 UCC28740
Current     Current     Current     Current     Current     Current     Current     Current     Current    
  99       70     70     70     70     99     99    
130     130     130     120     120     120     120     100     100    
  10.3/9.3     10.2/8     14.5/8     14.5/8     14.5/8     14.5/8     21/8     21/7.75    
Green Mode
Light Load Efficiency    
Error Amplifier
Green Mode
Light Load Efficiency    
Soft Switching     Light Load Efficiency
Current Limiting
Enable/Shutdown
HV Start-up
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking    
      Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Low Power
Light Load Efficiency
Soft Switching
Current Limiting
HV Start-up
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
-40 to 125     -40 to 105     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
VSSOP     SOIC     PDIP
SOIC    
SOIC     SOIC     SOIC     SOIC     SOIC     SOIC    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
8VSSOP: 3 x 3: 15 mm2     8SOIC: 3.91 x 4.9: 29 mm2     8SOIC: 3.91 x 4.9: 29 mm2
8PDIP: 6.35 x 9.81: 82 mm2    
7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2    
0.38 | 1ku     0.40 | 1ku     0.40 | 1ku     0.60 | 1ku     0.60 | 1ku     0.60 | 1ku     0.60 | 1ku     0.42 | 1ku     0.42 | 1ku    
WEBENCH® LM5023
AC Frequency 60 Hz 50 Hz
    Min   Max   Range  
  VinRMS V    90.00 – 264.00V  
  Vout V    5.00 – 24.00V  
  Iout A    ≤ 5.00A  
  Ambient Temp °C    ≤ 100°C  

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