2 ohm load on TDA1562 with larger heatsink - diyAudio
 2 ohm load on TDA1562 with larger heatsink
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 Chip Amps Amplifiers based on integrated circuits

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 21st July 2012, 04:17 PM #1 diyAudio Member   Join Date: Jul 2012 2 ohm load on TDA1562 with larger heatsink So I've built amplifier with TDA1562 and it would be great if I could use it with 2 ohm load, unfortunately I can't find any info on how safe it is or isn't. Don't want to destroy the IC, but don't want to buy another one either. So let's say if I used larger heatsink with the chip (so it's not overheating), can I still damage the IC?
 22nd July 2012, 06:18 PM #2 diyAudio Member   Join Date: Feb 2011 Yes You can. There is a limit of current delivered. Getting hot is just one thing. You can use 2 ohm "safely" as a load if You place a resistive voltage divider at the IC inputs to make sure You do not cross the limit. (actualy its the same as not turning up the volume.)
 22nd July 2012, 07:12 PM #3 Sin Bin   Join Date: May 2008 Location: Front Row Center Can't you run them in parallel ..(multiple chips )..?
 22nd July 2012, 07:36 PM #4 diyAudio Member     Join Date: Aug 2011 Location: London I think you'd be ok using a 2 ohm load, but do check the current rating on the data sheet. You can also work out your maximum output power driving such a load by using the equation: P = I*I*R Where 'I' is the maximum output current R is the load impedance, and P is the maximum output power driving that load. Hope that helps __________________ http://www.objectivesounds.co.uk/ With perfect linearity, it is impossible to go off on a tangent.
 22nd July 2012, 07:47 PM #5 diyAudio Member   Join Date: Jul 2012 Well, I tried the 2 ohm load, while I didn't damage the IC, I heard some glitches here and there so I think I'll just buy another IC so I have amp for both speakers (I got 2 speakers each 4 ohm, used them in parallel). Btw the heatsink is becoming pretty much untouchable even with 4 ohm load, is it fine? I had bought TDA1562 amp kit and heatsink came with it so I think it should be good, but not entirely sure. Thanks for replies.
 22nd July 2012, 07:50 PM #6 diyAudio Member   Join Date: Feb 2010 Location: England Try lowering the supply voltage or increasing it to the max the chip can take and put the 4ohm speakers in series. __________________ Audio projects and more: gswdh.co.uk
 22nd July 2012, 07:53 PM #7 diyAudio Member   Join Date: Jul 2012 Boscoe: I'll use it as car amp, so what I get from the battery is what I have. Anyways, 2 ohms shouldn't be a problem anymore if use 2 chips... Just worried about heatsink being very hot.
 22nd July 2012, 09:51 PM #8 diyAudio Member   Join Date: Feb 2011 use a fan maybe? if it can't be touched, that means its probably too hot.

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