PMP10610 Reference Design

Texas Instruments

Ref. Design - EMI Optimized 12W SEPIC Power Supply for Automotive with CISPR 25 Class 5 Compliance


The PMP10610 is a 12W SEPIC power supply reference design for automotive applications. It takes 12V nominal input voltage: and generates a 12V @ 1A output with 92% peak efficiency. The SEPIC converter topology allows voltage step-up and step-down conversion. The design covers a wide input range of 4.5V to 20V. When using it in the 12V car battery system: the design can operate uninterrupted during vehicle start-stop. The reference design features the LM3481 as the SEPIC controller: and it is available in automotive grade AEC-Q100 Grade 1. The design uses single coupled inductor to achieve compact solution size. The component area of the SEPIC is about 24 x 30mm (1.2 x 0.95inch). The reference board is layout-optimized for improved EMI performance: and there is an optional input EMI filter section on the board. The board is tested under the automotive EMC standard: CISPR 25: and its conducted emissions are in compliance with the CISPR 25 Class 5 limits.

  • Single coupled inductor SEPIC converter design4.5V to 20V input voltage rangeHigh efficiency: 92% peakEMI optimized design: in compliance with CISPR 25 Class 5 conducted emissions standardLM3481 controller: AEC-Q100 qualified version availableThe reference board is tested: and the test report and design files are included
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Product Categories
  • Power management

End Equipment Reference Diagrams


Part Number Name Companion Part
LM3481 LM3481 Buy Datasheet

Bill Of Materials

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Test Data

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Other Documents

Title Updated Type Size (KB)
PMP10610 Gerber 11 Jun 2015 ZIP 319
PMP10610 PCB 11 Jun 2015 PDF 324
PMP10610 BOM 11 Jun 2015 PDF 114
PMP10610 Schematic 11 Jun 2015 PDF 128