Two-phase interleaved boost converter  reference design for Class-H audio amplifiers


Design files


This reference design demonstrates a 450-W, 2-phase interleaved boost converter reference design for the Class-H audio amplifier application. To provide supply to the external audio amplifier, the controller is able to follow the Class-H control signal from the amplifier and generate an output voltage which tracks the speaker amplitude. Therefore, minimized overall power consumption and losses can be achieved.

  • Well-balanced internal current sharing between the two phase of the boost converter; power as well as thermal stress can be shared evenly with small board size         
  • 450-W converter 12-cm x 6.5-cm in size; high power and high power-density design         
  • Class-H control capable; boost output voltage is able to follow the speaker output amplitude to minimize power consumption as well as losses 
Output voltage options PMP41079.1 PMP41079.2
Vin (Min) (V) 9 3.3
Vin (Max) (V) 16 3.3
Vout (Nom) (V) 42 10
Iout (Max) (A) 10 .6
Output Power (W) 420 6
Isolated/Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC
Topology Boost- Multiphase Boost- 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.

TIDT360.PDF (1534 K)

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

TIDMC38.ZIP (548 K)

Detailed schematic diagram for design layout and components

TIDMC39.PDF (181 K)

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

TIDMC40.PDF (350 K)

Detailed overview of design layout for component placement

TIDMC42.ZIP (7393 K)

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


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

TIDMC41.PDF (1240 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report 2-Phase Interleaved Boost Converter Stage Ref. Des. for Class-H Audio Amplifier PDF | HTML Nov. 08, 2023

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