DER-270: 24V @ 4A, 12V @ 2.4A, 300 ~ 420VDC in

Summary

This document is an engineering report describing a 12 V and 24 V, 125 W LLC DC-DC converter utilizing a LCS701HG integrated LLC power stage IC. This power supply is intended as for use in an LCD TV with LED back lighting. The board requires 12 VDC and 380 VDC inputs.

The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.

Specifications

Manufacturer Power Integrations
Category AC/DC and DC/DC Conversion
Sub-Category AC/DC SMPS - Multi Output
Eval Board Board not Stocked
AC Voltage 230 V
Outputs and Type 2 Isolated
Voltage Out: Highest Current First 24V, 12V
Current Out 4A, 2.4A
Output Power 125 W
Efficiency @ Conditions >94%, 380 VDC, 100% load
No-load Input Power @ Voltage - Not Given
Features Current Limit (Adj. or Fixed)
Over Current Protection
Over Voltage Protection
Short Circuit Protection
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 190 kHz
Internal Switch Yes
Component Count + Extras 52 + 25
Voltage In 300 ~ 420 VDC + 12 VDC
Application / Target Market LCD Backlighting
LCD TV / Monitor
Design Author Power Integrations
Main I.C. Base Part LCS701
Date Created By Author 2011-09
Date Added To Library 2018-06

Support Documents & Media

DER-270 - User Guide LCS701 - Datasheet

Media

DER_270_Schematic_Full.png DER_270_Board_Full.jpg DER_270_Board_2_Full.jpg DER_270_Chart_Full.png DER_270_Chart_2_Full.png DER_270_Table_Full.png