A phone charger is there to charge a battery. More than 15Watt does not matter for a Pi5 if it cannot do 5A at 5V.THISSSS!!!!!Then it is maybe something with powersupply, the usual things
I thought 67W phone charger would deliver enough for a 27W pi 5.
But NO!!!
It was power supply issue. Using an official Pi 5 PSU worked like a charm for any number of FFMPEGs
A charger has an easy task of delivering 'some' power, it does not really matter if the 5V is not exactly 5V. A lot of ripple down to 4.5 Volt or so is still good enough to charge a 3.7 Volt LiPo battery in a smartphone.
A smartphone has much more complex internal power management chip that also needs to power sensitive analog parts like microphone. And it can make stable 5V of lower 3.7 Volt from LiPo battery for connecting USB OTG devices for example.
A Pi5 is very low-cost and as much as possible externally, also cannot rely on very stable and high current LiPo battery cell.
My typical Samsung NVME SSD spec says 7.8Watt, a Pi5 will draw 2.4A under max load, so 7.8+2.4*5 = 19.8 Watt.
Look at the specs of the '67W phone charger'; Likely only 3A max for all different USB-C PD voltages (5, 9 ,12, 15, 20). A Pi5 asks for 5A @ 5V, does not get it, so only gets 3A @ 5V = 15 Watt.
So if your storage solution draws a similar amount of power, I hope you understand now why it crashes.
It is not the first time and also not the last time such an issue pops up on this forum. That is what happens when computers/(mother)boards are sold as a set of components for DIY.
Statistics: Posted by redvli — Sun Dec 01, 2024 11:12 am