Universal Input to 3.3V, 12V, 30V, 200W Continuous PSU for Class-D Amplifier Reference Design


Design files


This power reference design generates all voltages to supply a class-D audio amplifier. The main output voltage is 30V and delivers 200W continuously and 750W 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 30V output is disabled while 12V, 3.3V are "always on". This way the stand-by power is reduced further. A second digital input switches the main output voltage from 30V 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, 750W peak power
  • Constant switching frequency: particularly suitable for audio applications
  • Good plug-to-plug efficiency:  85% @ 115Vac, 87% @ 230Vac
  • Compact construction:  88mm x 173mm, height 35mm
Output voltage options PMP30183.1 PMP30183.2 PMP30183.3 PMP30183.4
Vin (Min) (V) 90 120 10 350
Vin (Max) (V) 264 430 14 430
Vout (Nom) (V) 400 12 3.3 30
Iout (Max) (A) .55 .3 .2 6.6
Output Power (W) 220 3.6 .66 198
Isolated/Non-Isolated Non-Isolated Isolated Non-Isolated Isolated
Input Type AC DC DC DC
Topology Boost- PFC Flyback- DCM Buck- Synchronous Forward- 2 Switch
Personal electronics
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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.

TIDUDV0.PDF (1754 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


Detailed overview of design layout for component placement

TIDRTJ0.ZIP (2150 K)

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

TIDCE07.ZIP (135 K)

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

TIDRTI9.PDF (2009 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Noninverting buffers & drivers

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Shunt voltage references

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Temperature switches

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Technical documentation

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Type Title Date
* Test report PMP30183 Test Results Nov. 17, 2017

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