High Current Regulated Power Supply For Gainclone: Design Thread - Page 2

AndrewT · 24th March 2009, 06:14 PM

Hi,
What is the peak current demand of an 8ohm speaker?

200W into 8r0 approximates to 7.1Apk for sinewave power.
An 8ohm speaker can require three times this, i.e. 20Apk on fast transients.

Where can that current peak come from?
Can some of this demand be met by the decoupling close to the output stage?

What is the peak transient current that is permitted in a warm or hot 3055?
How many 3055 are required to meet the remaining peak transient current demand of that 8ohm speaker.

rhysh · 24th March 2009, 06:22 PM

Hi, we will be running a maximum of 150w into an 8 ohm speaker, or 300w into 4ohms.

There is 8,800uf of decoupling per rail, for 6 LM3386, running at 30V rails.

The continuos collector current of each 3055 is 11A @ 50C.

24th March 2009, 06:14 PM	#11
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, What is the peak current demand of an 8ohm speaker? 200W into 8r0 approximates to 7.1Apk for sinewave power. An 8ohm speaker can require three times this, i.e. 20Apk on fast transients. Where can that current peak come from? Can some of this demand be met by the decoupling close to the output stage? What is the peak transient current that is permitted in a warm or hot 3055? How many 3055 are required to meet the remaining peak transient current demand of that 8ohm speaker. __________________ regards Andrew T.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lost Thread-High VOltage Regulated Power Supply	LinuksGuru	Tubes / Valves	2	21st June 2009 01:48 AM
regulated power supply for high powered amps.	marchel	Solid State	14	5th March 2009 09:00 AM
Links to High Current Regulated Power Supply?	lgreen	Solid State	1	25th January 2005 12:11 AM
high-voltage regulated dual power supply	zzz	Solid State	1	17th September 2002 01:15 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

24th March 2009, 06:22 PM	#12
rhysh diyAudio Member Join Date: Sep 2008	Hi, we will be running a maximum of 150w into an 8 ohm speaker, or 300w into 4ohms. There is 8,800uf of decoupling per rail, for 6 LM3386, running at 30V rails. The continuos collector current of each 3055 is 11A @ 50C.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)