Class A-B amplifier, which complementary bjt should I use?

Thread Starter

muyustan

Joined Nov 29, 2019
10
I am designing an amplifier to drive an 8 ohms speaker at 4-5 Watts. I was planning to use TIP41C/42C, however, I have been told that those are very ancient components from 1970s. So, could you please recommend me some pairs you are using nowadays? I would be happy if they are easily available(common parts) so I can find it in easily. Thanks in advance.
 

Janis59

Joined Aug 21, 2017
968
General answer: use any passing the wattage, voltage and amperage IF them have a gain frequency factor f(T) around 3...50 MHz. Less - You get damaged trebble, and over - You get high-freq oscillations.
 

Audioguru again

Joined Oct 21, 2019
674
There are many IC audio amplifiers producing only 4W-5W into 8 ohms. An LM4950 is class-AB bridged and delivers 5.2W into 8 ohms at low distortion using an 11V supply, about 6W output using a 12V supply.

Some of the amplifiers are stereo and class-D with low heating so they can use a battery with little current wasted in heating, then the IC needs no heatsink.
 

#12

Joined Nov 30, 2010
18,167
There are many IC audio amplifiers producing only 4W-5W into 8 ohms. An LM4950 is class-AB bridged and delivers 5.2W into 8 ohms at low distortion using an 11V supply, about 6W output using a 12V supply.

Some of the amplifiers are stereo and class-D with low heating so they can use a battery with little current wasted in heating, then the IC needs no heatsink.
Glad to see you back, McDuck.
 

Thread Starter

muyustan

Joined Nov 29, 2019
10
There are many IC audio amplifiers producing only 4W-5W into 8 ohms. An LM4950 is class-AB bridged and delivers 5.2W into 8 ohms at low distortion using an 11V supply, about 6W output using a 12V supply.

Some of the amplifiers are stereo and class-D with low heating so they can use a battery with little current wasted in heating, then the IC needs no heatsink.
I am actually trying to build it myself, rather than using an IC. Thanks for advices anyway.
 
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