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reference designLNK6779E | Demoboard DER-762

Power Integrations LNK6779E | Demoboard DER-762

DER-762 - 120 W Isolated Flyback Power Supply Using LinkSwitch-HP

Overview

TopologyFlyback Converter
Input voltage85-265 V
Output 124 V / 5 A
IC revisionA

Description

This report describes a universal input, 12 V, 120 W, isolated flyback using LNK6779E from the LinkSwitch-HP family of ICs. It contains the complete power supply specifications, bill of materials, transformer construction information, schematic and printed circuit board layout, along with performance data and electrical waveforms.

Features

  • Primary-side regulated isolated flyback converter with ±5% regulation
  • 132 kHz switching frequency for small transformer and output filter size
  • Full load Continuous Conduction Mode (CCM) operation for improved efficiency and reduced output capacitor ripple current
  • <70 mW no-load input power at 230 VAC
  • Multimode operation maximizes efficiency across load range
  • Extensive protection including OVP, OTP, brown-in/out, line overvoltage, and lostregulation (auto-restart)
  • 88% full load efficiency @ 115 VAC and 90% full load efficiency @ 230 VAC
  • Easily meets DoE 6 efficiency requirements of 88% average efficiency (end of cable)
  • Class B Conducted EMI with > 6 db margin

Typical applications

  • Appliances

More information

Products

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Product series
Application
C
VR(V (AC))
Safety Class
dV/dt(V/µs)
DF @ 1 kHz(%)
RISO
Pitch(mm)
L(mm)
W(mm)
H(mm)
Packaging
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890324024003CS
SPECWCAP-FTX2 Film Capacitors, Across the mains, 330 nF
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-FTX2 Film Capacitors
ApplicationAcross the mains 
Capacitance330 nF
Rated Voltage275 V (AC)
Safety ClassX2 
Rate of Voltage Rise260 V/µs
Dissipation Factor0.1 %
Insulation Resistance30 GΩ
Pitch12.5 mm
Length15 mm
Width8.5 mm
Height14 mm
PackagingCarton 
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