Telecom Bus Converter for Module Replacement
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Highest performance, highest power 175W telecom active clamp forward, 5V @35A w/ lowest form factor

  • Adding active clamp and sync rectifiers improves efficiency of forward (and flyback) up to 5% (Efficiencies >90%, here up to 95%)
  • Forward provides best efficiency due to lower conduction losses than flyback
  • Forward can be scaled to higher output power with similar results
  • Flyback for multiple outputs or when cost is most important

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)72
Vout (Nom) (V)5
Iout (Max) (A)35
Output Power (W)175
Input TypeDC
TopologyForward- Active Clamp

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17312Q5  30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.7 mOhm  MOSFETs  Sample & Buy Not Available
UCC2897A  110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection  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)
CSD17312Q5 Download Download
UCC2897A Download Download
Download Download

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Technical documentation

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User guide (2)
Title Type Size (KB) Date
PDF 1536 18 Dec 2013
PDF 625 23 Nov 2011
Design files (4)
Title Type Size (KB) Date
ZIP 101 18 Dec 2013
PDF 587 18 Dec 2013
PDF 26 23 Nov 2011
PDF 67 23 Nov 2011

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