3W Stereo Audio Amplifier using TDA7266D

Rajkumar Sharma      http://www.rajkumarsharma.com  
7624
Project tested

3W-Stereo-Amp-TDA7266D-A055A-500x500

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.

Specifications

  • 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

Schematic

3W-Stereo-Amp-TDA7266D-SCH

Parts List

3W-Stereo-Amp-TDA7266D-bom

Photos

3W-Stereo-Amp-TDA7266D-A055B-500x500

Video

PCB

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