24V/36W Flyback Reference Design PMP20809 (ACTIVE)

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Key Document

Description

The PMP20809 reference design is an isolated DCM flyback design that takes a universal line input 85VAC to 265VAC, and produces a 24V ouput capable of 36W loading. The reference design uses the LM5021 controller to enable a high switching frequency and minimize transformer size. It achieves 90% efficiency at high and low line, and measures 1.5in x 3.6in on a 2 layer board.

Features
  • Universal input, 85VAC to 265VAC
  • Achieves over 90% efficiency at low and high line
  • 140kHz switching frequency enables small transformer design
  • Optocoupled feedback provides accurate regulation (within <1%) across the load range
  • 2-layer board, 1 oz copper, measuring 1.5in x 3.6in

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP20809.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)24
Iout (Max) (A)1.5
Output Power (W)36
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- DCM

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5021  AC-DC current mode PWM controller  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5021 Download Download
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TL431 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1064 23 Jun 2017
Design files (6)
Title Type Size (KB) Date
ZIP 466 23 Jun 2017
ZIP 449 23 Jun 2017
PDF 598 23 Jun 2017
PDF 92 23 Jun 2017
PDF 64 23 Jun 2017
PDF 102 23 Jun 2017

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