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IC manufacturers Texas Instruments

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reference designLM5155

Texas Instruments LM5155

36~57-Vdc input, 5-V/4-A output isolated flyback with synchronous rectification reference design

Overview

TopologyFlyback Converter
Input voltage36-57 V
Output 15 V / 4 A
IC revision001

Description

This reference design is a 36~57-Vdc input, 5-V/4-A output isolated flyback converter using LM5155 and UCC24612. The switching frequency is 250 kHz. With the synchronous rectification controller UCC24612 and a MOSFET at the secondary side, the system achieves 89.29% peak efficiency at 36-V input, which is 3.86% higher than Schottky rectification. The temperature of the rectified MOSFET is 33 degrees Celsius lower than Schottky under full load output. The load regulation in the whole input range is within ±0.5%.

Features

  • An isolated flyback with simple synchronous rectification solution
  • 250-kHz switching frequency
  • 89.29% peak efficiency
  • Low temperature rise of rectified component

Typical applications

  • Campus & branch switches, IP network camera, Video doorbell

More information

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691214110002
SPECWR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular, 2, Rising Cage Clamp
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular
Pins2 
ApplicationRising Cage Clamp 
PCB/Cable/PanelPCB 
ModularityYes 
TypeHorizontal 
Wire Section 24 to 16 (AWG) 0.2 to 1 (mm²)
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