General discussion • Raspberry pi 4B PSU question

I have a the original CanaKit PSU rated at:

Output voltage = 5.1V
Output current = 3.5A
Power = 17.85W

What will happens under the following scenarios -- different PSU ratings:

scenario 1:
Output voltage = 20V
Output current = 3.5A
Power = 70W
Answer: PI will work fine. max output of PSU will prevent excess current from entering PI


scenario 2:
Output voltage = 11.6V
Output current = 6A
Power = 69.6W
Answer: PI will get damaged. PI could draw more current (and the PSU will gladly supply this current since it's rated at 6A). If we are lucky current limiting fuse will prevent PI from getting damage.

scenario3:
Output voltage = 70V
Output current = 1A
Power = 70W
Answer: PI won't work. Not enough current supply can be delivered by the PSU. Potential for PSU to get damaged

scenario4:
Output voltage =5.1V
Output current = 13.7A
Power = 67.87W
Answer: PI will get damaged. PI could draw more current (and the PSU will gladly supply this current since it's rated at 6A). If we are lucky current limiting fuse will prevent PI from getting damage.

Are the answers to above scenarios correct?

Statistics: Posted by microberry — Fri Aug 30, 2024 2:31 am

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