Help designing a car amplifier, 15W or 20 W

Discussion in 'Homework Help' started by baiazid, Aug 16, 2011.

  1. baiazid

    Thread Starter New Member

    Aug 14, 2011
    Hi Everyone,
    I'm only new here and I want to say Hi to all of you.
    I need to design a car amplifier and I've picked TDA7370B, the reason it is a quad amp. after some minor calc. I have realised that if i want to have an output of 15W I need to supply ~22Vcc to the amp. Is this right or i'm mising something? Can I use the application circuit as the design for the circuit with the same components value or has to be recalculated?
    Thank you
  2. Audioguru

    New Member

    Dec 20, 2007
    When two of its amplifiers are bridged (the amplifiers drive each end of a speaker), the speaker is 4 ohms, the distortion is low (below clipping) and the supply is 13.8V (not overcharging at 14.4V) then the power is about 12W.

    The power is 20W when the amplifier is bridged driving a 4 ohm speaker with a supply that is 14.4V and the amplifier is clipping like mad with horrible 10% distortion.

    Its max operating supply is 18V so you cannot use 22V.