Offline AC/DC 75W Quasi-Resonant Flyback Converter Reference Design
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Key Document


The PMP10100 reference design uses the LM5023 flyback controller for the Quasi-Resonant Flyback Topology. It generates an isolated output (19.5V@3.84A) from an universal input (85VAC - 265VAC).

  • Quasi-Resonant Flyback Topology
  • Four Point Average Efficiency = 89.3% (Vin=110VAC)
  • Four Point Average Efficiency = 89.4% (Vin=230VAC)
  • 10% Load Efficiency = 89.6% (Vin=110VAC)
  • 10% Load Efficiency = 87.2% (Vin=230VAC)

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Design Files

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(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)19.5
Iout (Max) (A)3.84
Output Power (W)74.88
Input TypeAC
TopologyFlyback- 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
LMV431A  1%, low-voltage (1.24-V) adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5023 Download Download
LMV431A Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 891 30 Nov 2015
Design files (3)
Title Type Size (KB) Date
ZIP 387 30 Nov 2015
PDF 119 30 Nov 2015
PDF 156 30 Nov 2015

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