3W Stereo Audio Amplifier using TDA7266D

  • Rajkumar Sharma
  • 17359
  • easy
  • Tested


Tiny stereo audio amplifier board has been designed around SMD TDA7266D IC from ST. The TDA7266D is a dual bridge amplifier specially designed for Portable Audio, LCD TV/Monitor, PC Motherboard, and TV applications. This circuit provides high quality audio output of 3W approx. on each channel with standard audio signal input. The circuit works with 3.5V to 5V. Due to low supply input this amplifier is suitable for small size audio gadgets and portable audio applications like MP3 player, Voice messaging system, Warning signals, Annunciator etc.


  • Supply voltage range 3.5 to 5v (maximum supply 5v due to small pcb and small thermal area)
  • Output power 3+3w @thd = 10%, rl = 8ω, vcc = 3.7v (3w approx.)
  • Single supply
  • Minimum external components – no svr capacitor – no bootstrap – no boucherot cells – internally fixed gain
  • Mute functions (jumper close)
  • Short circuit protection
  • Thermal overload protection



Parts List







  • Jyotiram Sahu

    Sir i want to buy this complete circuit i.e 3w stereo amplifier using TDA7266D. So pls reply me to my email id.

    2 years ago
    • admin

      We can sell this amplifier if order quantity is >25 pieces. Thanks

      2 years ago
      • oladimeji alade

        can i buy this complete circuit in nigeria

        1 year ago

Leave a Reply to oladimeji alade Cancel reply


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