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
Package Size: mm2:W x L (PKG)
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
Power Delivery Compatible   
Error Amplifier
Green Mode
Light Load Efficiency
Power Delivery Compatible
Motor Drive Compatible
Audio Compatible   
Soft Switching
Power Delivery Compatible
Audio Compatible
Motor Drive Compatible   
Audio Compatible    Audio Compatible    Audio Compatible    Motor Drive Compatible   
-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   
See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)    7SOIC: 29 mm2: 6 x 4.9(SOIC)   
0.38 | 1ku    0.40 | 1ku    0.40 | 1ku    0.60 | 1ku    0.60 | 1ku    0.60 | 1ku    0.60 | 1ku   

WEBENCH® Designer LM5023

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 85.00 to 265.00V
Vout  V 5.0 to 24.0V
Iout  A ≤ 5.0A
Ambient Temp  °C -40 to 125°C