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Is there any way to bridge the stk4231ii?
I have 2 of these chips and they supply 100 watts into the left channel and 100 watts into the right channel. I was wondering if there is any way to bridge these channels together and supply 200 watts into one load. That way I can use both chips for a 400 watt stereo. Thanks!
Hm, latch-up on equipment this powerful (and expensive) would not be a good thing. The torroid I'd be using for this is +/- 42.5 volts and the ripple-rejection capactiors would be 71 volts at 8200uf. So I'd just be better off leaving them single-ended and just have a 4-speaker set-up, huh?
Hm, latch-up on equipment this powerful (and expensive) would not be a good thing. The torroid I'd be using for this is +/- 42.5 volts and the ripple-rejection capactiors would be 71 volts at 8200uf. So I'd just be better off leaving them single-ended and just have a 4-speaker set-up, huh?
Sorry about the double post.
3 Answers
- ?Lv 78 years agoFavorite Answer
I took a quick look at the data sheet and it seems that it should work. The only concern I would have is during power up (and power down) is there some possible latch up condition?
- StevenLv 78 years ago
You can bridge most any amplifier but when you bridge an amp, the matching load impedance is double since each amp sees half the load resistance. So if each amp is rated for 4 Ohms, bridging two will be rated for not less than 8 Ohms. To drive a 4 Ohm load in bridge, you need amps that are rated for 2 Ohms each. This is done in auto stereos because the amp has to run from 12VDC but there is lots of current available, and of course, each output is rated 2 Ohms in order to bridge a 4 Ohm speaker. They also float at 6VDC so that no output capacitor is required.
If you really want a lot of power, you should look at discrete circuits, not chips. Something very cool (literally) is the UCD amps.
http://www.diyaudio.com/forums/class-d/77105-bruno...
Beware that a big amplifier means you will probably damage your speakers.
