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Old 23rd June 2009, 01:55 PM   #1
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Default How easy do HIP4080AIPZ's go?

Hi all,

I've been working on a Camtec amp for a friend and would just like to know how easy do HIP4080's pop, I haven't worked on a class-d car amp that use them before. I am suspecting that it is fried as 4 of the 8 output mosfets fried creating a dead short between all 3 pins. The amp gives output after changing the fet's but it's not as loud as I would think it should be and sounds a wee bit noisy. O and the HIP4080 feels a little warm, not to hot though. The fet's are IRF1310N

Thanx
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Old 23rd June 2009, 02:51 PM   #2
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The chips sometimes fail without even having FET problems. Change it.
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Old 23rd June 2009, 03:58 PM   #3
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thanx, will do
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Old 25th June 2009, 09:23 AM   #4
Eva is offline Eva  Spain
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When a MOSFET driver like this fails, there are very few chances for the amplifier to continue working. The failure usually results in shorted supplies.

That amplifier is probably noisy and not as powerful as expected by design. The modulator inside the HIP is noisy and most amplifiers use it instead of an external one.

Also, MOSFET drivers usually get quite hot, particularly when their outputs are not buffered and they are driving the gates directly.
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Old 25th June 2009, 09:11 PM   #5
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Quote:
Originally posted by Eva
When a MOSFET driver like this fails, there are very few chances for the amplifier to continue working. The failure usually results in shorted supplies.

That amplifier is probably noisy and not as powerful as expected by design. The modulator inside the HIP is noisy and most amplifiers use it instead of an external one.

Also, MOSFET drivers usually get quite hot, particularly when their outputs are not buffered and they are driving the gates directly.
This is just what I've noticed:

Supply did not short out when FET's blew, it has 8 FET's (2 FET's in parallel) on the output, 4 of which were shorted between GDS (basically the top half of the full bridge was blown). That caused the full supply voltage to be seen by the driver chip.

The amplifier isn't making nearly full power as I found out the amplifier was driving 2 DVC competition subs at 155db. And secondly it's a monoblock with a lot of features and techniques used in some of the high end car amps that is putting out as much power as say a stock headunit?

I am awaiting the new chip(s) from RS components.

Thank you
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