Universal Input to 3.3V, 12V, 36V, 200W Continuous PSU for Class-D Amplifier Reference Design


Design files


This power module generates all voltages to supply a class-D audio amplifier. The main output voltage is 36V and delivers 200W continuously and 840W peak. The first stage is a power-factor corrected Boost. A Flyback converter supplies 12V on primary side as well as 12V@300mA and 3.3V@200mA on secondary side. A hardware switch + remote input let the converter enter in stand-by mode: in this status the 36V output is disabled and 12V, 3.3V are "always on". This way the stand-by power is reduced down to 150mW @ 115Vac and 270mW @ 230Vac. A second digital input switches the main output voltage from 36V to 18V, allowing low current consumption mode in case of the audio amplifier needs less power.

  • Low cost PFC + 2-switch forward topology provides 200W average, 840W peak power
  • Constant switching frequency: particularly suitable for audio applications
  • Simple thermal inteface: two small heat-sinks placed on one side of the board
  • Good plug-to-plug efficiency: 84% @ 115Vac, 86% @ 230Vac
  • Compact construction: 126mm x 145mm, height 35mm
Output voltage options PMP10215.1 PMP10215.2 PMP10215.3 PMP10215.4
Vin (Min) (V) 85 120 10 350
Vin (Max) (V) 264 430 14 430
Vout (Nom) (V) 400 12 3.3 36
Iout (Max) (A) .55 .3 .2 15
Output Power (W) 220 3.6 .66 540
Isolated/Non-Isolated Non-Isolated Isolated Non-Isolated Isolated
Input Type AC DC DC DC
Topology Boost- CCM Flyback- DCM Buck- Synchronous Forward- 2 Switch
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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.

TIDUBS3.PDF (1946 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

TIDRLM3.PDF (1182 K)

Detailed overview of design layout for component placement


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

TIDCC51.ZIP (391 K)

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

TIDRLM4.PDF (1158 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Temperature switches

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Technical documentation

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Type Title Date
* Test report PMP10215 Test Results May 03, 2016
Application note Designing With the Improved TL431LI (Rev. A) Jun. 28, 2019
More literature High-Power Audio Amplifiers TPA322x/4x/5x Dec. 01, 2017

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