pocketPSU

Specs

Output1:

• Efuse protected USBPD output
• 3A, 20V
• setting resolution depends on capability of USB-C brickw. If using a PPS capable supply, 10mV CV and 50mA CC settings
• By default this output is disabled as the PD command will track output 3 for minimal power loss in LDO
• Must be lower than output2

Input1:

• Output1 can be used to supply pocketPSU via a battery
• Optional battery charging capability (addon board with BMS)

Output2:

• (optional) Boost output with efuse protection (no dedicated CC)
• 1A 3.3-30V
• By default this tracks output3 for minimal power loss in LDO
• Must be higher than output1 and output3

Output3:

• LDO output for low ripple
• 1A 0-30V (limited current based on input/output delta)
• Must be lower than output1

User interface

The user interface will consist of:

• One LCD screen
• One rotary encode + integrated switch. The switch could serve as a way to switch between fine and coarse setting
• One button to turn the power output on/off
• Three buttons for navigation:
  • Up
  • Down
  • Select

Powering the PSU

The supply can be powered over USB-C or using an external battery. The battery could potentially be a power tool battery that users already have on hand.