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reference designLM5023

Texas Instruments LM5023

AC-DC Quasi-Resonant Current Mode PWM Controller

Overview

TopologyOther Topology
IC revisionD

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 MaintainsAccuracy 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

Typical applications

  • Consumer Electronics
  • Universal Input AC-DC Notebook Adapters 10 W to 65 W
  • High Efficiency Housekeeping and Auxiliary Power
  • Battery Chargers

More information

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74466340007
SPECWE-LF SMD Common Mode Power Line Choke in SMT, 5.25 A, 0.7 mH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LF SMD Common Mode Power Line Choke in SMT
Rated Current5.25 A
Inductance [1]0.7 mH
DC Resistance [1]0.03 Ω
Rated Voltage250 V (AC)
Insulation Test Voltage1500 V (AC)
MaterialMnZn 
Length23.3 mm
Width18.5 mm
Height11.5 mm
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