RDK-321: 5 @ 1A, 18V @ 670mA, 90 ~ 265VAC in

Summary

This report describes a universal input, 5 V/1000 mA and 18 V/670 mA isolated flyback converter employing LNK6774V from the LinkSwitch-HP family of ICs. It contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the supply, extensive documentation of the power transformer, along with test data and waveform plots of the most important electrical waveforms.

The LNK6774V device (U1) integrates an oscillator, an error amplifier and multi-mode control circuit, startup and protection circuitry and a high-voltage power MOSFET all on one monolithic IC.

Specifications

Manufacturer Power Integrations
Category AC/DC and DC/DC Conversion
Sub-Category AC/DC SMPS - Multi Output
Eval Board Part Number RDK-321-ND
Eval Board Supplier Power Integrations
Eval Board Board not Stocked
AC Voltage 115 V
230 V
Universal (115 / 230V)
Outputs and Type 2 Non-Isolated
Voltage Out: Highest Current First 5V, 18V
Current Out 1A, 670mA
Output Power 17.1 W
Efficiency @ Conditions >85%, 120 ~ 255 VAC, 5/18V @ 1000/670 mA
No-load Input Power @ Voltage 100 mW @ 230 V
Features Current Limit (Adj. or Fixed)
Over Voltage Protection
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 132 kHz
Internal Switch Yes
Component Count + Extras 40 + 3
Voltage In 90 ~ 265 VAC
Application / Target Market LCD TV / Monitor
Design Author Power Integrations
Main I.C. Base Part LNK6774V
Date Created By Author 2012-09
Date Added To Library 2015-08

Support Documents & Media

RDR-321 - User Guide LinkSwitch-HP - Datasheet

Media

RDR_321_Schematic_Full.png RDR_321_Board_1_Full.jpg RDR_321_Board_2_Full.jpg RDR_321_Chart_1_Full.png RDR_321_Chart_2_Full.png RDR_321_Chart_3_Full.png