18-40Vin Isolated 5V/6A Power Supply with Low Profile for Industrial Application Reference Design
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This 5V / 6A  solution implements a high efficiency active clamp controller LM5025A and self-drive synchronous rectifier. Input voltage is 18V-40V as typical industrial request and efficiency is 89.5%@24Vin full load. The transformer is embeded into the PCB and 8mm height can be met. The design is suitable for height limited industial applications.

  • Wide input range from 18V to 40V
  • Adjustable Dual Mode Over-Current Protection
  • Active Clamp Forward +S.R controller for high efficiency
  • Lower output ripple voltage with less output capacitor
  • Small form factor: 60mm x 40mm x 8mm
  • Low cost through self-drive secondary synchronous rectifier circuit

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(Output Voltage 1)
Vin (Min) (V)18
Vin (Max) (V)40
Vout (Nom) (V)5
Iout (Max) (A)6
Output Power (W)30
Input TypeDC
TopologyForward- Active Clamp

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17301Q5A  30V, N ch NexFET MOSFETâ„¢, single SON5x6, 3mOhm  MOSFETs  Sample & Buy Not Available
CSD19533Q5A  100V, N ch NexFET MOSFETâ„¢, single SON5x6, 9.5mOhm  MOSFETs  Sample & Buy Not Available
LM5025A  90V active clamp voltage mode PWM controller with P or N-channel clamp FET and 0.5V CS threshold  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17301Q5A VSONP (DQJ)| 8 Download Download
CSD19533Q5A VSONP (DQJ)| 8 Download
LM5025A Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 683 11 Mar 2015
Design files (3)
Title Type Size (KB) Date
ZIP 654 11 Mar 2015
PDF 63 11 Mar 2015
PDF 101 11 Mar 2015

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