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22 Feb 2011

electronicsimple.blogspot.com writes:

This audio power amplifier project is based on LM1875 amplifier module from National Semiconductor. It is able to deliver up to 30W of power using an 8 ohm load and dual 30V DC power supplies. It is designed to operate with minimum external components with current limit and thermal shutdown protection features . Other features include high gain, fast slew rate, wide power supply range, large output voltage swing and high current capability.

25W Audio Power Amplifier - [Link]

29 Sep 2010

This circuit is an audio amplifier circuit rated at 25W. It uses IC number LM1875, which is under the protection circuit IC output or Too short circuit and a significant distortion as low as 0.015% at a frequency of 1kHz.

25W Hi-Fi Audio Amplifier using ic LM1875 – [Link]

28 Aug 2010

This project is a 20W audio amplifier based on LM1875 IC from National Semiconductors. With a 25V dual power supply LM1875 can deliver 20W of audio power into a 4 ohm speaker.

20W audio amplifier using LM1875 - [Link]

3 Feb 2008


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

20W Audio Amplifier using LM1875 - [Link]





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