Teensy 4.1 Computer

The Teensy 4.1 Computer is more or less described by its name: Its a carrier board for the Teensy 4.1 which provides four USB ports, an Ethernet port, Hi-Fi audio, and several convenient expansion ports.

Detailed Specifications

USB:

• TUSB2046 USB Hub, providing 4 USB A ports
• Each port has a maximum of 1.5A output - the port will shutdown due to overcurrent above this
• Board power provides a maximum of 2A to the 5v supply
  • one should be aware of this when considering the power used by USB devices

Audio:

• I2S control connected to Teensy I2S 2
• PCM5102 ADC for providing stereo sound
• OPA1688 for the amplifier
• 3.5mm audio jack, maximum 75mA per channel
• Separate ground, connected to main ground through a ferrite bead
• Separate 3.3v and 5v supplies from linear regulators to reduce noise
  • Note: 5v line will come from main 5v rail if only powered from USB

Power:

• 2A 5v buck regulator (Exact part is the VR20S05)
• PMOS switches to prevent regulator backfeeding from USB and to control power flow (U16, U17, and U18 on the PCB)
• External VIN accepted from 8v to 20v
• Separate 5v and 3.3v supplies for audio circutry
• Barrel jack and screw terminal connections for VIN