High Frequency (750kHz) 48V to 24V/0.7A Flyback Converter Reference Design
PMP21002
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Key Document

Description

The PMP21002 reference design is a high frequency flyback converter with a 42-57Vdc input and an isolated 24V/0.7A output.  The LM5020 is a current mode PWM controller with an integrated start-up regulator.  The 750kHz switching frequency allows operation above noise sensitive frequencies and results in small size.  This reference design is well suited for PoE or telecom applications.

Features
  • 750kHz switching frequency
  • 1500VRMS isolation
  • Small size (2.0 x 2.3 inches)
  • Good efficiency, 86% at 0.7A

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP21002.1
(Output Voltage 1)
Vin (Min) (V)42
Vin (Max) (V)57
Vout (Nom) (V)24
Iout (Max) (A).7
Output Power (W)16.8
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5020  13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TLV431A  1% accuracy, low-voltage, adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5020 Download Download
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TLV431A Download Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 854 28 Sep 2017
Design files (7)
Title Type Size (KB) Date
ZIP 739 28 Sep 2017
ZIP 292 28 Sep 2017
ZIP 471 28 Sep 2017
PDF 412 28 Sep 2017
PDF 95 28 Sep 2017
PDF 98 28 Sep 2017
PDF 114 28 Sep 2017

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