40W Synchronous ZETA Converter with Coupled-Inductor Reference Design
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This coupled-inductor, 13.2V at 4A, synchronous ZETA converter achieves greater than 95% efficiency at full load. It is capable of 5A out for Vin greater than 10V. It utilizes all surface mount components, maintains a low temperature rise and is capable of high peak load transients. See PMP9581 REVC for this design with seperate inductors.

  • Fully synchronous ZETA converter
  • Transformer output current is greater than 5A when input is above 10V
  • Efficiency is greater than 95% at full load
  • Board length is approximately 70 mm
  • Test report available

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)6.2
Vin (Max) (V)16
Vout (Nom) (V)13.2
Iout (Max) (A)3
Output Power (W)39.6
Input TypeDC

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
CSD18531Q5A  60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.6 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM5116  6-100V Wide Vin, Current Mode Synchronous Buck Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18531Q5A VSONP (DQJ)| 8 Download
LM5116 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1503 14 Apr 2015
Design files (3)
Title Type Size (KB) Date
ZIP 207 14 Apr 2015
PDF 13 14 Apr 2015
PDF 122 14 Apr 2015

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