Wide input voltage SEPIC converter power supply reference design for industrial applications


Design files


This SEPIC converter operates over an input voltage range of 10 V - 100 V and provides a non-isolated output of 12 V/1 A. Once operating, the 12-V output supplies bias power to the control circuit, allowing operation below 10 Vin. With efficiency greater than 85%, this converter can tolerate multiple input rail ranges, allowing one converter to satisfy many applications. 

  • Full-load efficiency between 86% and 88% for input voltages from 12 V to 48 V
  • Wide input voltage range of 10 V to 100 V
  • Can be used when multiple voltage rails are available or when voltage transients are present
Output voltage options PMP21519.1
Vin (Min) (V) 10
Vin (Max) (V) 100
Vout (Nom) (V) 12
Iout (Max) (A) 1
Output Power (W) 12
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Sepic- CCM
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT069.PDF (2527 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRYK2.PDF (1187 K)

Detailed overview of design layout for component placement

TIDRYK4.ZIP (13477 K)

Files used for 3D models or 2D drawings of IC components

TIDCF73.ZIP (389 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

TPS40210-Q14.5-V to 52-V wide input range current mode boost controller with 700-mV reference voltage

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Wide input voltage SEPIC converter power supply reference design Jan. 07, 2019

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