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Speaker: USB

USB Speaker Design Resources and Solution Suggestions.

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AC/DC Adaptor

Design Considerations

A USB Speaker is a speaker that relies on one connection (a USB connection from your PC) to provide both audio and power to the listener. Streaming audio is sent via the USB interface and power is provided through the USB connection.

The Core Subsystems include:

  • USB DAC
    - the DAC communicates with a PC it is connected to and converts the streaming audio into analog format for amplification and driving the speaker.
  • Audio Power Amplifier
    - the audio amplifier provides the power amplification to drive the speaker. Class-D audio amplifiers use a very power efficient technology versus traditional amplifiers. This allows more output power from a given power supply.
  • Amplifier Monitor (SVS)
    - USB power requirements specify compliance to a maximum of 5V and 500mA. In order to prevent the amplifier from trying to source more power, a monitoring/feedback circuit is implemented to reduce the output power from the audio amplifier.

Application Notes (1)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 19 Nov 2008 1379
    

Reference Designs

Description Part # Company
Buck for USB Hub (5V @ 3A) PMP1692 Texas Instruments

Product Bulletin & White Papers

Product Bulletin (3)

Title Abstract Type Size (MB) Date Views
PDF 55 KB 20 Dec 2006 699
PDF 54 KB 06 Dec 2006 1054
PDF 170 KB 18 Apr 2006 617

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