LM5023 AC-DC Quasi-Resonant Current Mode PWM Controller | TI.com

LM5023
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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

WEBENCH® Designer LM5023

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 14.00 to 2000.00V
Vout  V 3.3 to 1000V
Iout  A ≤ 100A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Control method Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Rating Package size: mm2:W x L (PKG)
LM5023 Order now Secondary-side regulation     100     130     12.8/7.5     Quasi-Resonant
SSR
Green Mode
Light Load Efficiency    
-40 to 125     VSSOP | 8     Catalog     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
UCC28600 Order now Secondary-side regulation     99     130     10.3/9.3     SSR
Quasi-Resonant
Error Amplifier
Green Mode
Light Load Efficiency    
-40 to 105     SOIC | 8     Catalog     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC28610 Order now Secondary-side regulation     100     130     10.2/8     SSR
HV Start-up
DCM    
-40 to 125     PDIP | 8
SOIC | 8    
Catalog     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
UCC28704 Order now Primary-side regulation     99     85     21/7.7     PSR
DCM    
-40 to 125     SOT-23 | 6     Catalog     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
UCC28740 Order now Secondary-side regulation     99     100     21/7.75     SSR
HV Start-up
DCM    
-40 to 125     SOIC | 7     Catalog     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28780 Order now Secondary-side regulation     99     1000     17.5/10     SSR
Zero Voltage Switching    
-40 to 125     SOIC | 16
WQFN | 16    
Catalog     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16WQFN: 9 mm2: 3 x 3 (WQFN | 16)