20W Audio Amplifier using LM1875

20W Audio Amplifier using LM1875
Specifications

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

Schematic

Parts List

PCB

Download

Download this circuit in PDF

Source : http://www.electronics-lab.com/projects/audio/047/index.html
author: Rajkumar Sharma

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