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

LM5023 (ACTIVE)

AC-DC Quasi-Resonant Current Mode PWM Controller

Recommended alternative parts

  • UCC28700  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   Frequency dithering and integrated FET
  • UCC28710  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   Integrated FET, ideal for lower power
  • UCC28600  - The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent.   QR Flyback cascode bias and startup drive
  • LM5020  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   100V Start-up, fixed frequency flyback

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 PWM and Resonant Controller

 
Topology
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Regulated Outputs (#)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
LM5023 UCC28600 UCC28610 UCC28710 UCC28740
Flyback     Flyback     Flyback     Flyback     Flyback    
Current     Current     Current     Current     Current    
  99       99     99    
130     130     130     100     100    
  10.3/9.3     10.2/8     21/8     21/7.75    
1     1     1     1      
Green Mode
Light Load Efficiency    
Error Amplifier
Green Mode
Light Load Efficiency    
Soft Switching     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    
Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 105     -40 to 125     -40 to 125     -40 to 125    
8VSSOP     8SOIC     8PDIP
8SOIC    
7SOIC     7SOIC    
0.38 | 1ku     0.40 | 1ku     0.40 | 1ku     0.42 | 1ku     0.42 | 1ku    

Featured tools and software

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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