LM3875 Bridged and/or paralleled

Scribble · 22nd October 2004, 07:36 PM

Ok i have a few spare lm3875's lying around and ive been searchign all over for bridged or paralleled circuits but have had no luck finding one.

Has anyone sucesfully ran these chip's bridged or paralleled and has a schematic at all?

Any help appreciated.

Thanks for your time,
Joel

joensd · 22nd October 2004, 07:43 PM

You should google for "AN-1192" which would give you actually all you need.
THIS might help as well.
Building a bridged and/or parallel circuit with your LM´s depends only on what you wanna drive with them.
Most speakers are happy with a single LM-chip but a 4Ohm subwoofer for example certainly needs a paralleled partner to get him going as the 3875 can only put out between 4 and 6 amperes.

peranders · 22nd October 2004, 08:42 PM

Here they are:

http://www.national.com/an/AN/AN-1192.pdf
http://www.national.com/appinfo/audi...gn_Guide13.xls
http://www.national.com/appinfo/audi...sign_Guide.pdf

22nd October 2004, 07:36 PM	#1
Scribble diyAudio Member Join Date: Dec 2002 Location: Western Australia	LM3875 Bridged and/or paralleled Ok i have a few spare lm3875's lying around and ive been searchign all over for bridged or paralleled circuits but have had no luck finding one. Has anyone sucesfully ran these chip's bridged or paralleled and has a schematic at all? Any help appreciated. Thanks for your time, Joel

22nd October 2004, 07:43 PM	#2
joensd diyAudio Member Join Date: Dec 2001 Location: Germany	You should google for "AN-1192" which would give you actually all you need. THIS might help as well. Building a bridged and/or parallel circuit with your LM´s depends only on what you wanna drive with them. Most speakers are happy with a single LM-chip but a 4Ohm subwoofer for example certainly needs a paralleled partner to get him going as the 3875 can only put out between 4 and 6 amperes. __________________ jens

22nd October 2004, 08:42 PM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Here they are: http://www.national.com/an/AN/AN-1192.pdf http://www.national.com/appinfo/audi...gn_Guide13.xls http://www.national.com/appinfo/audi...sign_Guide.pdf __________________ /Per-Anders (my first name) or P-A as my friends call me

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