Stereo Audio Amplifier Based on TDA7266D

Schematic
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Introduction about TDA7266D
Tiny stereo audio amplifier board has been designed around SMD TDA7266D that produced by 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.
TDA7266D Datasheet
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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
Parts List
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Photos
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Comments

  • mhardy6647
    mhardy6647 Posts: 32,926
    all righty then...
  • tonyb
    tonyb Posts: 32,902
    Well there it is, if I ever wanted to upgrade the power supply from my Hello Kitty boombox, I have a solution. :):)
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
  • pitdogg2
    pitdogg2 Posts: 24,474
    What no film caps????

    Rookie!
  • Viking64
    Viking64 Posts: 6,646
    tonyb wrote: »
    Well there it is, if I ever wanted to upgrade the power supply from my Hello Kitty boombox, I have a solution. :):)
    I installed one of these into my 1968 talking G.I. Joe as the original had some leaking caps. It was a tight fit. Between the bigger size of the new "wardrobe" necessary to accommodate this amp, and the fuzzy G.I. Joe beard, the doll ended up being a dead-ringer for Sebastian Cabot as Mr. French on "Family Affair".
  • tonyb
    tonyb Posts: 32,902
    Viking64 wrote: »
    tonyb wrote: »
    Well there it is, if I ever wanted to upgrade the power supply from my Hello Kitty boombox, I have a solution. :):)
    I installed one of these into my 1968 talking G.I. Joe as the original had some leaking caps. It was a tight fit. Between the bigger size of the new "wardrobe" necessary to accommodate this amp, and the fuzzy G.I. Joe beard, the doll ended up being a dead-ringer for Sebastian Cabot as Mr. French on "Family Affair".

    LOL....only those of age know that one.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
  • mhardy6647
    mhardy6647 Posts: 32,926
    edited September 2017
    I dissected a talking GI Joe once. I believe he had suffered a mortal injury on the battlefield ;)

    These (ahem) dolls employed a clever analog technology for sound reproduction; basically a mylar strip (like an audio tape, but a little thicker) with a modulated groove cut into it. In essence, an 'endless loop' record.