Offline AC/DC 120W Multi-Output Flyback Power Supply Reference Design
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The PMP4408 is a universal AC input, 120W flyback converter reference design. The LM5023 Quasi Resonant Flyback converter was chosen to get 2 high-efficiency isolated outputs. Additionally a downstream Buck converter, the TPS5402 enables 2 high-efficiency non-isolated outputs. The QR Flyback design implements Valley switching for high-efficiency and full protection features such as output short circuit and output overvoltage.

  • Good cross regulation
  • Valley switching for high efficiency
  • Output OVP, OCP and Short Circuit Protection
  • Input brown-out
  • Average efficiency is high
  • Size 92mm(L) x 95mm(W) x 30mm(H)

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Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
(Output Voltage 4)
Vin (Min) (V)1762020176
Vin (Max) (V)2642828264
Vout (Nom) (V)2415542
Iout (Max) (A).6.81.52
Output Power (W)14.4127.584
TopologyFlyback- Quasi ResonantBuck- Non SyncBuck- Non SyncFlyback- Quasi Resonant

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5023  AC-DC quasi-Resonant current mode PWM controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
TPS5402  3.5V to 28V Input, 1.7A Output, Non-Synchronous Step-Down Regulator with Integrated MOSFET  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5023 Download Download
TPS5402 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 371 10 Mar 2015
Design files (3)
Title Type Size (KB) Date
ZIP 101 10 Mar 2015
PDF 29 10 Mar 2015
PDF 43 10 Mar 2015

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