Do you want a low-frequency class B power amplifier? See TDA2020 may be one of choice that you not should miss. In a 14-lead quad, the in-line plastic package is easy to use.
In normally It gives 20 watts output power, at distortion = 1%, +/-18V supply, and 4 ohms speaker. And, in the datasheet guaranteed output power is 15 watts at +/-17V on 4 ohms speaker.
Also, TDA2020 provides high output current up to 3.5A. And, so low harmonic and cross-over distortion.
Sound good, doesn’t it?
Not only that.
It has a short circuit protection system. And, The shut-down system when is too over temperature. And, the output transistors within their safe operating area.
Now you are interesting this amplifier IC, right?
See:
Buy here
Highest level of use
- Vs—Supply Voltage: ±22V
- Vi—Input Voltage: Vs
- Vi—Differential input voltage: ±15V
- Io—Output Peak Current (internally Limited): 3.5A
- Ptot—Power dissipation at T case ≤ 75°C: 25W
- Tstg, Tj: Storage and junction temperature: -40 to 150°C
TDA2020 Pinout
How to use it. See the connection pinout.
The copper slug connects to pin 5.
Have you ever wondered? IC is small, but why has a high wattage power? Will it be durable?
Yes, they can. Because they install enough heatsink.
Look:
Mounting system of TDA2020.
What is more? Want to see circuit now?
20W OCL Power Amplifier circuit
Here is a simple power amplifier circuit in OCL class B using TDA2020.
If we use the 18V 2A Dual Power supply (+18V, -18V, GND). And Speaker 4 ohms. It can give output power 20 watts RMS.
The part lists
TDA2020 30 watts Bridge amplifier circuit
Even more importantly. We can get more wattage by using Bridge amplifier.
Do you know about it?
Imagine you have a stereo amplifier using TDA2020. You want More power and Mono only.
You can modify them to bridge mode. Don’t waste time looking at the circuit.
The TDA2020 Bridge amplifier circuit on 30 watts at 8 ohms or 4 ohms.
It requires a more double current of power supply. But the same voltage.
80W OCL HiFi Amplifier using TDA2020 and transistors
It is good to you want more power, like me. We can use pair NPN-PNP power transistors to increase louder sound.
Look in the circuit below.
TDA2020 80 watts Hi-Fi OCL Power amplifier. This circuit style is similar to the TDA2050 and TDA2030 amplifier.
Using transistor boost up current is a good idea. It is saved and easy.
The gain of this circuit about 50 to 80 dB.
You may also like these:
The circuit requires power supply max 32V(+32V, -32V and Gnd) Dual power supply at 3A current.
Makes output power gives 75 watts to 85 watts at 4 ohms or 8 ohms speaker.
Note: Because this circuit is old and maybe a mistake. So, not suitable for a beginner.
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I love electronics. I have been learning about them through creating simple electronic circuits or small projects. And now I am also having my children do the same. Nevertheless, I hope you found the experiences we shared on this site useful and fulfilling.
I have been waiting for a circuit which is capable of delivering high out put audio amplifier. thanks for the expected circuit made available by you. very many thanks
I do not have dual power supply rail. How I. Can operate this Tda 2020 amplifier with single supply rail ie + – only and GND will be –
Hi,
In datasheet, It is class B amplifier on OCL amplifier or BCL amplifier.
I am sorry, I cannot know how to use single power supply rail for TDA2020.
Thanks
Hello Apichet, greetings from India, I wish to tell you that this IC TDA 2020 was very popular when I was in my college days this is around 1980s probably or 1985 is also this was very nice circuit and we had made many many amplifiers running on 2020, but it suddenly disappeared from the market and we couldn’t locate it there after. I don’t know if it available in the market now. There are some peculiarities about this amplifier.It is very good, reliable, powerful and very satisfying if constructed properly and mind you, this circuit is not meant for beginner if not constructed properly, if you don’t follow the earthing requirements and you don’t do anything about earth loops or even the insulation between the heat sink and the IC if not done properly which is a big issue in this case can result in instant breakdown of the IC. So to the rest of you, pz be careful, it is a good circuit and a good Ic. Happy building. Bye…
Dear my friend, Prashanth Suvarna.
I am glad to read your comment. I am impressed by your valuable experience. It is a pity that TDA2020, is hard to find nowadays. If I have a chance, I would like to try to build this circuit again. The old amplifier IC has a unique sound.
Hope you will share your experience again.
Have a good day.