Teensy 4.1 Computer
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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