Home Projects Audio 20W Audio Amplifier using LM1875


20W Audio Amplifier using LM1875
author: Rajkumar Sharma




20W Audio Amplifier kit is based on LM1875 IC.

  • Power supply - 48 VDC

  • Output - 20 W, 4 Ω

  • Very low distortion (THD - 0.015%), good channel separation and ripple rejection

  • IC built-in thermal, short circuit protections

  • Internal output protection diodes

  • Terminal pins for connecting input

  • Power Battery Terminal (PBT) for easy power supply and speaker connection

  • Power-On LED indicator

  • Heatsink for IC

  • Four mounting holes of 3.2 mm each with nut and stud

  • PCB dimensions 48 mm x 60 mm




Parts List





Download this circuit in PDF



120x90 spot



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