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Class D Switching Power Amplifiers and Power D/A conversion

Good fanless Mean-Well supplies, 24V+, 150-220W
Good fanless Mean-Well supplies, 24V+, 150-220W
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Old 8th August 2011, 12:26 PM   #1
kristleifur is offline kristleifur  Iceland
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Join Date: Apr 2006
Location: Reykjavík
Default Good fanless Mean-Well supplies, 24V+, 150-220W

Hi all,

I was looking through MeanWell's catalog of supplies and made a shortlist of supplies that should work well with TK2050 Tripath amps and other single-rail Class D amps. I hope this info is useful for someone.

I just ordered the fanless HRPG-200 from Mouser in 24V.

Click the image to open in full size.

Details at Mouser. Datasheet.

I found these other fanless 24V supplies between 150W and 200W; Noise is around 150mV P-P for 24V, switching frequency is outside the audio band (60KHz and higher), and they work on universal voltage:

Plastic, fully enclosed:
  • GS220 - external enclosed brick type supply; 220W and fanless; High efficiency (over 90%). I didn't pick it 'cause it was €20 more than the HRPG-200, and a tiny little bit noisier (180mV), and most of all, it would probably run hotter in the enclosed case I'm putting my amp in.
In-case supplies, enclosed in aluminium shield, with adjustable voltage by about 10%:
  • HRP-150
  • HRP-200
  • HRPG-150
  • HRPG-200
  • SP-150
I took the HRPG-200 because of the 5-year warranty, good regulation (0.2% line and load), larger adjustment range of output voltage, highest power without a fan, and better cooling properties than the plastic GS series.

The SP has the lowest cost, and the GS-220 is interesting for its high efficiency, high power, and that it is fully enclosed and protected.

150W should be enough for two channels of 24V into 4 Ohms with the TK2050. If you take these supplies to their output maximum of about 28V, then 200W is what you want.

Please find further details in my post at the 41Hz forum.

Last edited by kristleifur; 8th August 2011 at 12:29 PM.
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