This is just addition 20W audio
amplifier circuit , but this time based on the LM1875 audio amplifier
IC from National Semiconductors. With a 25V bifold ability accumulation
LM1875 can bear 20W of audio ability into a 4 ohm speaker. The LM1875
requires actual beneath external components and has actual low
distortion.
The IC is aswell arranged with a lot acceptable appearance like fast bulk rate, advanced accumulation voltage range, top achievement current, top achievement voltage swing, thermal aegis etc. The IC is accessible in TO-220 artificial ability amalgamation and is able-bodied acceptable for a array of applications like audio systems, servo amplifiers, home theatre systems etc.
Notes.
- Assemble the circuit on a good quality PCB.
- Use +/-25V DC dual supply for powering the circuit.
- K1 can be 4 ohm, 20W speaker.
- A proper heat sink is necessary for the IC.
- F1 and F2 are 2A
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