Are these just two transistors? (schematic query)

Thread Starter

deki

Joined Sep 6, 2011
23
Sorry! I forgot to post the link (it's there now) :/
But yes, now that you mention it, it is a Darlington pair transistor. Thanks.
 

Thread Starter

deki

Joined Sep 6, 2011
23
^^But the PWM circuit would still work if I just used two transistors and connected them in such a configuration?
 

debjit625

Joined Apr 17, 2010
790
Yes, Darlington pair could be made by single transistors connecting in that way, but those packages are specially designed to improve its performance. So use a Darlington package rather making one...

Good Luck
 

Wendy

Joined Mar 24, 2008
22,138
Another similar transistor configuration is the Sziklai Pair

Both are high gain configurations, where the total beta equals the two beta multiplied.

Both act like a single transistor.

Both will drop a minimum of 0.6VDC in saturation on the CE equivalent.

The Darlington Pair will drop 1.2VDC on it's equivalent BE.

The Sziklai Pair will drop 0.6VDC on it's equivalent BE.
 
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