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Sunday, January 22, 2017

How to Parallel Final Transistor Power Amplifier

How can parallel the final transistor power amplifier circuit? comes to a question from a visitor elcircuit.com. And whether the function of the parallel final transistors? 
How to increasing wattage power amplifier by parallel transistor final.
First, how to paralleling final transistor power amplifier you must know the supply voltage, Emitter line, and Base transistor line, from power amplifier circuit. Then connect it to the parallel transistor, you can see below the schematic from power amplifier and the parallel transistor final.

I take an example 2800W power amplifier circuit on the block of its final transistors.
Final Transistor Amplifier 2800W
After we know its line, then you must parallel transistor like the schematic below:
Parallel Transistor final power amplifier
Then connect all together, as jumper connector to paralleling final transistor:
J1 to Emitter on power amplifier circuit
J2 to (+) Voltage supply 
J3 to (-) Voltage supply
J4 to (+) Base or NPN Base Transistors
J5 to (-) Base or PNP Base Transistors
J6 to Ground

Resistor before input voltage on a base function to divide voltage current and produced heat evenly in order to transistors. And the capacitors is to temporarily store incoming voltage to the transistors, in order to do not drop when a high load on each transistor. 
For transistors TIP3055 and TIP2955 in parallel are just as an example, you can change as needed. It would be better you use transistors of the same type in a circuit of power amplifiers.

To make it easier, I share the Layout PCB for boost transistor final amplifier:

Layout final transistor amplifier
Boost Final transitor power amplifier circuit
Actually already many discuss this issue. But it would not hurt my post back with a more simple and easy. What is the final transistors parallel function? Many say the final transistor parallel, it can increase the power produced wattage power amplifier. Is it really like that? The answer correctly. By increasing the number of transistors final wattage power will increase. 

But in addition to adding the final transistors, transformer capability should also be considered. As more transistors finals are mounted, so the power and the load will also increase. If not matched by sufficient transformer capability, then the power amplifier will drop immediately.

Download Final Transistor Booster Schematic.PDF

Electronic Circuit is a good site for hobbyist also who would like to try DIY because it shared good circuits. If you have a personalized circuit requirement you may feel free to request it through the comment box or contact me.


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