IC manufacturers Texas Instruments

IC manufacturers (99)

Texas Instruments LM5023

AC-DC Quasi-Resonant Current Mode PWM Controller

Overview

TopologyBuck Converter
Input voltage90-264 V
Output 119 V / 3.43 A
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

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesVINVOut1
(V)
IOut1
(A)
Vaux
(V)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MountSize Samples
750313417SPEC
5 files Active i| Production is active. Expected lifetime: >10 years.MID-OLTI Offline Flyback Transformers for Texas Instruments 85 - 265 V (AC) 19 3.43 10 70 - 130 400 6:1:0.55 3.3 1875 27.03 32.31 13.97 SMT EFD25
Order Code Data­sheet Simu­lation
750313417SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesVINVOut1
(V)
IOut1
(A)
Vaux
(V)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
MountSize Samples