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Class D Switching Power Amplifiers and Power D/A conversion

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Old 2nd November 2007, 12:35 AM   #1
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Default Sure-Electronics.com class d amps

Does anyone have any experience/opinion on this amp? spec sheet
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Old 2nd November 2007, 01:15 AM   #2
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This was discussed briefly under the thread "Class D on ebay". Nobody in that thread had bought one yet--just guesses as to what chip is used. The single supply suggests a TI chip, but it's got an analog input, which means it probably isn't TI.

I put one on order Oct 26. When it comes in I'll dissect it and post results.
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Old 2nd November 2007, 02:48 AM   #3
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According to the drawing there is only one large device under the heat sink. I would guess that it might be a Sanyo STK series chip.
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Old 7th November 2007, 01:58 AM   #4
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Default Photos

I'm not going to try to take the heatsink off, but here are some photos. It'll be a while before I can really give it a listen, but it works and has me curious.

The main chip is one large device.

Photos of Sure 4 Channel Amp
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Old 7th November 2007, 10:52 AM   #5
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Almost certainly a Sanyo STK428-xxx 'Ice-Power' module. I've tested their two-channel module (STK430-428) and it's a nice performer, though the frequency response alters noticeably with load impedance.
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Old 7th November 2007, 11:40 AM   #6
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FWIW - pdf with product info on STK428-600 2 channel modules - just for the general description
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Old 7th November 2007, 11:56 AM   #7
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Though this one looks like a single-supply (+24V) version. (My Sanyo data for this range is a couple of years old and doesn't show a full-bridge, single-supply. single-rail module at that time.)
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Old 7th November 2007, 12:00 PM   #8
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Sorry, I meant that my old data doesn't show a full-bridge, single supply, 4-channel unit!
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Old 7th November 2007, 04:08 PM   #9
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Is this it, or half of it anyway ?
http://www.comprel.it/scheda_prodott...t/news1476.pdf
PS I ordered one and a 24V switch mode power supply and they arrived today. Will have a listen at the weekend..
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Old 7th November 2007, 09:17 PM   #10
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Default Re: Photos

Quote:
Originally posted by buzz1939
I'm not going to try to take the heatsink off, but here are some photos.
Hmmm...I would have taken off that heatsink within 5 minutes of opening the package. Inquiring minds need to know!

Mine was supposedly shipped on Nov 1 but it hasn't shown up yet.
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