Protection for bridged amp

zafira1981 · 24th November 2005, 01:53 PM

Hi!!!! I finished my 2xLM3886 bridged amp. but i want to make a power-on & dc protection circuit. I've seen lot of circuits but none for bridged amp.

Is there a way to connect a non-bridged protection circuit to a bridged amp?

thanks
Jorge.

tlmadsen · 25th November 2005, 07:20 AM

If you want to be real safe you connect a DC-protection to each "arm" of your bridged amp.

I don't DC-protect my LM3886 based amplifiers, but if I had some really expensive speakers, I might !

You don't need a power on relay with the LM3886, unless you are thingk of some kind of in-rush current protection.

THomas

zafira1981 · 25th November 2005, 03:08 PM

Quote:

Originally posted by tlmadsen
If you want to be real safe you connect a DC-protection to each "arm" of your bridged amp.

I don't DC-protect my LM3886 based amplifiers, but if I had some really expensive speakers, I might !

You don't need a power on relay with the LM3886, unless you are thingk of some kind of in-rush current protection.

THomas

OK i will do that, one protection circuit per "arm"

Yesterday I started reading carefully the datasheets of 3886 and noticed that dont need power-on protection.

thanks!!!

24th November 2005, 01:53 PM	#1
zafira1981 diyAudio Member Join Date: Jan 2005 Location: Argentina	Protection for bridged amp Hi!!!! I finished my 2xLM3886 bridged amp. but i want to make a power-on & dc protection circuit. I've seen lot of circuits but none for bridged amp. Is there a way to connect a non-bridged protection circuit to a bridged amp? thanks Jorge.

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25th November 2005, 07:20 AM	#2
tlmadsen diyAudio Member Join Date: Aug 2003 Location: Roskilde - The vikingships	If you want to be real safe you connect a DC-protection to each "arm" of your bridged amp. I don't DC-protect my LM3886 based amplifiers, but if I had some really expensive speakers, I might ! You don't need a power on relay with the LM3886, unless you are thingk of some kind of in-rush current protection. THomas

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