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Audio amp to drive 2.3ohm speaker

Ed Walker
Prodigy 5 points
Other Parts Discussed in Thread: TPA2005D1, LM48312, LM48310

I need an audio amp, mono, that can drive up to 50mA into a 2.3ohm custom speaker, (115mV).
VCC will be 3.45V-3V.
Analog input will be centered at 1.25V

This is a battery powered device so it needs to be very low Iq, small space, and high efficiency.
I appreciate your suggestions.

  • 0
    TI__Mastermind 37045 points

    I've pinged my colleague to help you on this. You may want to use the audio product search tool for the meantime since most people are on vacation. 

    reg,

    Paul.

  • 0
    TI__Genius 9175 points

    Hi Ed,

    For this application we have a few amplifiers to choose from. All have very low Iq of around 2.8mA and would be good battery powered candidates.

    1. TPA2005D1 Mono Class-D w/ shutdown. Gain externally configured using resistors
    2. LM48312 Mono Class-D w/ shutdown. Gain controlled by a gain pin with appropriate resistor.
    3. LM48310 Mono Class-D W/ shutdown Fixed Gain, available system Clock sync.

     

    Regards,

    Matt