Max PSU voltage with SI T-amp

jives11 · 1st July 2007, 01:06 PM

Hi,

anyone have any idea what the maximum safe voltage you can use with the SI T-amp ?

I have a failry beefy 15v DC supply and wonder if it's saafe to use. T-amp says 12v but not sure if it has any safety/regulation

Pano · 1st July 2007, 08:37 PM

15 volts will cook it.

I don't like to go much over 13V. Some guys have run them at 13.8V without immediate trouble, others have fried the chip.

I would consider 13.8 to be the limit of what is safe, but feel better about lower voltages.

Buckapound · 2nd July 2007, 01:12 PM

I tried different voltages and was checking the chip temperature with an infrared thermometer. I did have a small aluminum computer memory chip heatsink on it.

I had one running at 13.8 volts, but the chip generated quite a bit of heat. At 14v it went into thermal shutdown. I eventually decided on 13.2v. At this level, the chip ran at least 10-15 degrees C cooler than at 13.8.

While the chip does have thermal protection, word is that continued operation at high temperatures will eventually degrade/destroy the chip.

--Buckapound

1st July 2007, 01:06 PM	#1
jives11 diyAudio Member Join Date: Mar 2004 Location: Hampshire	Max PSU voltage with SI T-amp Hi, anyone have any idea what the maximum safe voltage you can use with the SI T-amp ? I have a failry beefy 15v DC supply and wonder if it's saafe to use. T-amp says 12v but not sure if it has any safety/regulation

1st July 2007, 08:37 PM	#2
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	15 volts will cook it. I don't like to go much over 13V. Some guys have run them at 13.8V without immediate trouble, others have fried the chip. I would consider 13.8 to be the limit of what is safe, but feel better about lower voltages. __________________ Take the Speaker Voltage Test!

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2nd July 2007, 01:12 PM	#3
Buckapound diyAudio Member Join Date: Feb 2006 Location: Chicago, IL	I tried different voltages and was checking the chip temperature with an infrared thermometer. I did have a small aluminum computer memory chip heatsink on it. I had one running at 13.8 volts, but the chip generated quite a bit of heat. At 14v it went into thermal shutdown. I eventually decided on 13.2v. At this level, the chip ran at least 10-15 degrees C cooler than at 13.8. While the chip does have thermal protection, word is that continued operation at high temperatures will eventually degrade/destroy the chip. --Buckapound

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