How much current can you draw from the 5v pin?
#1
Posted 12 March 2012 - 10:39 PM
#2
Posted 12 March 2012 - 11:05 PM
My .NETMF projects: .NETMF Toolbox / Gadgeteer Light / Some PCB designs
#3
Posted 13 March 2012 - 08:24 PM
Hi DrJaymz,
Does this help?
http://forums.netdui...-5v-header-pin/
Well it states that the 5v regulator on board is good to 800mA we know that the controller uses about 250 so that leaves 550mA to stay in the current spec. So as long as the on board reg doesn't overheat we're good. The reg will shutdown in the event it gets too hot so it should be fine. perhaps my issues could be insufficient supply decoupling.
#4
Posted 13 March 2012 - 08:56 PM
Also my project behaves differently when running from a USB charger as opposed to connected to a PC. The timings appear to change on the UART which should be fixed surely or else it wouldn't work properly.
Yes, pretty sure that could be a power issue.
I would not be comfortable with a constant 800mA draw, even if its not shutting down, I don't like my board to be getting so warm. This could cause the board to get quite warm. I like to power via 5V rail with either a PC power supply, or a similar stand alone supply, and only use the on-board regulator for small projects.Well it states that the 5v regulator on board is good to 800mA we know that the controller uses about 250 so that leaves 550mA to stay in the current spec. So as long as the on board reg doesn't overheat we're good. The reg will shutdown in the event it gets too hot so it should be fine. perhaps my issues could be insufficient supply decoupling.
#5
Posted 14 March 2012 - 07:20 PM
Yes, pretty sure that could be a power issue.
I would not be comfortable with a constant 800mA draw, even if its not shutting down, I don't like my board to be getting so warm. This could cause the board to get quite warm. I like to power via 5V rail with either a PC power supply, or a similar stand alone supply, and only use the on-board regulator for small projects.
It'll be fine, you worry too much, what could possibly go wrong....... (don't know why they worry at work when I say that)
#6
Posted 15 March 2012 - 03:16 AM
#7
Posted 15 March 2012 - 06:00 AM
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