|22nd April 2012, 07:38 AM||#22|
So that should give around -/+26 volts DC. That's the voltage going into the regulators.
Voltage dropped across the reg is 26-15 which is 11volts.
The maximum power dissipation of the 7815 is around 1.8 watts at 40 degrees ambient.
So maximum current draw for 1.8 watts dissipation is around 160 milliamps.
I must admit when worked out like that it's more than I would have thought so it could well be that the regs are fine without heatsinks. Try measuring the total current drawn from each 15 volt rail. Easiest way is to insert a 1 ohm resistor in series with the rail and measure the volt drop across it and then calculate current using ohms law.
160 ma will power at least 10 NE5532's in a quiescent state.
A simulation free zone. Design it, build it, test it.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Choke power supplies for Class AB Power Amplifiers - which Rules for Calculating ??||tiefbassuebertr||Solid State||12||3rd November 2011 09:47 AM|
|DIY Audio Alchemy Power Station 2 Power supply PSU with case||roscoeiii||Swap Meet||2||29th May 2010 07:51 PM|
|TA8259H Max Power 37W BTLx4CH audio power IC for sale||winkison||Swap Meet||0||10th July 2008 10:42 AM|
|Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality||MARAVILLASAUDIO||Class D||1||5th November 2004 05:06 PM|
|power output calculations, rated power and required power output||metebalci||Tubes / Valves||7||22nd February 2004 06:49 PM|
|New To Site?||Need Help?|