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   On 23/05/2024 11:50, Pancho wrote:   
   > On 23/05/2024 10:58, The Natural Philosopher wrote:   
   >> On 23/05/2024 09:44, Pancho wrote:   
   >>> On 23/05/2024 09:03, Richard Kettlewell wrote:   
   >>>> The Natural Philosopher  writes:   
   >>>>> No problems with wimpy power supplies? apparently pi's and ssds take a   
   >>>>> lot of current at boot time   
   >>>>   
   >>>> It’s the official PSU.   
   >>>>   
   >>>   
   >>> I bought a Pi5 without the official PSU, or even a Pi4 official PSU.   
   >>> It would run for a minute or two and then crash. Completely unusable.   
   >>> It is now fine with the official PSU.   
   >> There is an entry in config.txt that 'tells' the pi that it has a high   
   >> power power supply.   
   >> Otherwise it has to do an appl-ish sort of negotiation with its PSU to   
   >> see if it is.   
   >>   
   >   
   > No, I was talking about the USB standard. This is from memory, so take   
   > with a pinch of salt.   
   >   
   > I have high wattage USB C chargers for mobiles, pads etc. They quote 20   
   > or 25 watts. Given I wasn't using any USB power draining devices, I   
   > assumed this would be OK for the Pi 5.   
   >   
   > However, it wasn't OK, Pi 5 crashed. When I looked at the USB small   
   > print, the charger achieved a high wattage by boosting the voltage from   
   > 5v to 20v, still using a relatively low amps. AIUI, this is USB standard.   
   >   
   > However, the Pi requires 5v (maybe even 5.1v) and a high 5 amps. Which   
   > is totally non-standard and makes the Pi 5 USB PSU effectively bespoke.   
   > I suppose, but haven't tested, the Pi 5 PSU is also no good to fast   
   > charge your mobile.   
   >   
   > Presumably there is some good cost justification, but I don't like it.   
   > The Orange Pi 5 is fine on a standard USB fast charger, but it is   
   > generally lower power than the Raspberry Pi 5.   
   >   
      
   5 Volts at 5 amps is within the USB power spec, albeit less commonly used.   
      
   --   
   Chris   
      
   --- SoupGate-Win32 v1.05   
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