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rs1026 12th September 2004 09:58 AM

Bridged lm4780
Has anyone tried using lm4780 in bridged mode. I wanted to use that configuration for a sub woofer. Wanted a few inputs on how to go about designing the PCB for this configuration.I want to keep this a single layer PCB since its more "diyable"

I am using ExpressPcb
Please help! I am stuck here because I dont know how much space I should allow for the ic pins and how to position the parts.


mandat 12th September 2004 10:10 AM

Look at the thread
Pavel Dudek vel Upupa Epops has presented his amp based on LM4780 ICs. You can look at his very complicated but flexible PCB.

tschrama 12th September 2004 10:49 AM

I made a stereo bridged pair of LM4780 amps.. but I didn't use a PCB, I made it on vero board, .. it doesn't look very pretty, but it works just fine... it's allmost unbelieveble how cheap a stereo 240Watt amp can be made now... 2xlm4780, and couple of resistors... ... I used the circuit of the datasheet, I got less then 20mV offset and it sound pretty good.. It does get warmer though, you may gotta you a significant heatsink..


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