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 (CrCM) operation. The LM5023 features a hiccup mode for overcurrent protection with an auto restart to reduce the stress on the power components during an overload. A skip-cycle mode reduces power consumption at light loads for energy conservation applications (ENERGY STAR®, CEPCP, and so forth). The LM5023 also uses the transformer auxiliary winding for output overvoltage protection (OVP); if an OVP fault is detected the LM5023 latches off the controller.

Features

  • Critical Conduction Mode
  • Peak-Current Mode Control
  • Skip-Cycle Mode for Low-Standby Power
  • Hiccup Mode for Continuous Overload Protection
  • Cycle-by-Cycle Overcurrent Protection Maintains
    Accuracy Over the Universal AC Line
  • Line-Voltage Feedforward
  • OVP Protection by Sensing the Auxiliary 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 VSSOP Package

View more

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
Current     Current     Current     Current     Current     Current     Current    
  99       70     70     70     70    
130     130     130     120     120     120     120    
  10.3/9.3     10.2/8     14.5/8     14.5/8     14.5/8     14.5/8    
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    
     
-40 to 125     -40 to 105     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
VSSOP     SOIC     PDIP
SOIC    
SOIC     SOIC     SOIC     SOIC    
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    
0.38 | 1ku     0.40 | 1ku     0.40 | 1ku     0.60 | 1ku     0.60 | 1ku     0.60 | 1ku     0.60 | 1ku    
WEBENCH® LM5023
AC Frequency 60 Hz 50 Hz
    Min   Max   Range  
  VinRMS V    85.00 – 264.00V  
  Vout V    5.00 – 24.00V  
  Iout A    ≤ 5.00A  
  Ambient Temp °C    ≤ 100°C  

What are WEBENCH® tools?
Click Here
SupplyFrame