2 stk4050v bridged amplifier - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 30th September 2009, 12:52 PM   #11
diyAudio Member
Join Date: Oct 2005
Send a message via AIM to shon35us Send a message via MSN to shon35us Send a message via Yahoo to shon35us
58 +/- volts ac correct?
  Reply With Quote
Old 7th July 2011, 11:02 AM   #12
diyAudio Member
Join Date: Jul 2011
Hi guys, looking to work with the STK4050 amp. Im also relitively inexperienced but ive built a couple small amps. Wondering is it possible to regulate a transformet, or how would you regulate a supply so that it can deliver +-66v to the stk4050?
  Reply With Quote
Old 7th July 2011, 03:43 PM   #13
diyAudio Member
Join Date: Jul 2011
how would you regulate it down to 66V const. Im also looking at building one of these amps.
  Reply With Quote
Old 18th July 2011, 05:36 PM   #14
diyAudio Member
Join Date: Jul 2011
Hi billbo, is veroboard robust enough to be able to handle the power riquired by the stk 4050?
  Reply With Quote
Old 18th July 2011, 06:26 PM   #15
diyAudio Member
Join Date: May 2008
Regulating a power supply
a) is expensive.
b) wastes electricity, because it converts the surplus voltage times the current draw into heat.
c) strangles your amp when it most needs to breath freely.

If you look at the datasheet, you will see that the specs were tested with a power supply that had a no-load voltage of 80 V and sagged to 66 V when loaded with an 8 Ohm resistor at 200 W output power. That is a good clue how to choose your transformer.
If you've always done it like that, then it's probably wrong. (Henry Ford)
  Reply With Quote
Old 19th July 2011, 02:10 PM   #16
diyAudio Member
Join Date: Jul 2011
Default STK4050

Thanks for the info, so to get around +-80V unloaded and +-66V loaded would it be suitable to use a 55-0-55V transformer?(80/sqrt2=55) approx?
Also, how many va should the transformer be for a single channel, would 300va be enough?
  Reply With Quote
Old 19th July 2011, 06:11 PM   #17
diyAudio Member
Join Date: Jul 2011
Originally Posted by noubar View Post
I'm building a power amplifier right now, it will be the 3rd one i build and i'm only 16 years old so i'm not a pro...

i've already tried a 2 ohm load on stk4048 IC's (150W RMS @ 8 Ohm) and it worked fine even at full power so my question is will the stk4050 IC (200W RMS @ 8 ohm) can handle a 2ohm load so i can bridge two of them and use a 4 ohm load...?

i need a little help as i don't know what pre-amp IC's to use to invert the signal of one channel and to keep the same gain at the other channel...

i also have to ask about the transformer as in the datasheet it is said that the stk4050 can handle 95V but the recommended voltage is 66V so i'm a little confused because i've already used a 60V (30V+30V) transformer for the stk4048 IC... so i was thinking to build a 90V (45V+45V) transformer for the stk4050 but i'm afraid to burn the stk4050 out...
i have good heatsink i never had overheating before, i always use fans so everytime i touch the heatsink it's cold even when the amp is running at full power (stk4048 amp). So does anyone have an idea how i can get the best power performance and without burning everything out...?

Did you build a soft start circuit for your amp? Will it be neccessary for the STK4050?
  Reply With Quote
Old 5th April 2013, 12:33 PM   #18
diyAudio Member
Join Date: Apr 2012
if can drive stk4050 a 1pc 18" subwoofer????? i already build stk4048 it is a powerfull amp my 12" speaker wa burn out ,. and the 15" inch is getting hot when i over drive the power of the stk 4048
  Reply With Quote
Old 29th September 2013, 05:48 AM   #19
diyAudio Member
Join Date: Sep 2013
Default Trying to troubleshoot stk4050V circuit

For some reason, the 100 ohm resistor between pins 14 and 15 burned-out. I replaced this resistor, but when I switch power on, this resistor just burns out. Is the stk4050 failing or should I be looking at something else?
  Reply With Quote
Old 28th November 2016, 12:56 AM   #20
diyAudio Member
Join Date: May 2011
Hi .I build stk4050 amp.my problem is when I make mistake short speaker wire to ground, my ic burn? Why burn? What I know stk4050 have load protection circuit.how I can overcome this problem?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Im BAAAACK! Marathon amplifier question, won't work bridged mono! 240z4u Car Audio 11 3rd April 2008 02:56 AM
Stk4050v steffmeister Chip Amps 1 22nd September 2004 02:56 PM
How do you bridge two bridged amplifier? thylantyr Solid State 41 15th October 2003 10:30 PM
STK4050V PCB's halvardf Solid State 3 1st September 2002 03:24 PM
Sound of bridged amplifier Gabevee Solid State 17 23rd July 2002 09:01 PM

New To Site? Need Help?

All times are GMT. The time now is 02:57 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2