Darlington question

kacernator · 25th December 2011, 08:42 PM

Hi,

I am using capacitance multiplier in my PSU, it is just darlington pair made from BC550 driver and 2CS5200. My question is how much current is passing through the driver transistor (BC550) if amplifier draws say 1A from PSU?

wahab · 25th December 2011, 08:54 PM

Something like 10mA and considering the low voltage loss for a VBEM ,
it will dissipate about 20mW ,but it s better to use a BD139 as driver, one never knows....

25th December 2011, 08:42 PM	#1
kacernator diyAudio Member Join Date: Jan 2008	Darlington question Hi, I am using capacitance multiplier in my PSU, it is just darlington pair made from BC550 driver and 2CS5200. My question is how much current is passing through the driver transistor (BC550) if amplifier draws say 1A from PSU?

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25th December 2011, 08:54 PM	#2
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	Something like 10mA and considering the low voltage loss for a VBEM , it will dissipate about 20mW ,but it s better to use a BD139 as driver, one never knows....

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