20-48-Vdc input isolated flyback reference design with a 48-V, 1.25-A output
PMP21030
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Key Document

Description

This reference design uses the LM3481 to provide an isolated 48-V output from a DC input ranging from 20 to 48-V. Its low profile design makes it suitable for applications where a small solution size is critical. The design achieves over 91% efficiency at a nominal 0.8-A load, and can provide a pulse up to 1.25-A.

Features
  • Over 91% efficient when delivering a 48-V, 0.8-A load with 20-V and 48-V input voltage cases
  • Less than 1% ripple on output at full load
  • Wide input range
  • 1500-Vrms isolation
  • Low profile design with 18-mm maximum height

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Parametrics
 PMP21030.1
(Output Voltage 1)
Vin (Min) (V)20
Vin (Max) (V)48
Vout (Nom) (V)48
Iout (Max) (A)1.25
Output Power (W)60
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- CCM

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM3481  2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback  Step-up (boost)  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)
LM3481 Download Download
TLV431A Download Download
Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1727 25 Apr 2019
Design files (6)
Title Type Size (KB) Date
ZIP 220 25 Apr 2019
ZIP 829 25 Apr 2019
PDF 522 25 Apr 2019
PDF 101 25 Apr 2019
PDF 30 25 Apr 2019
PDF 125 25 Apr 2019

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