Basic Current Question

Thread Starter

Ryankevin1201

Joined Sep 1, 2020
4
Hello, if I hook a circuit board up to a power supply, do you set a specific current level?

Or does the board just draw what current it needs? Could you accidentally send too much current to a circuit card?

I want to power a circuit card and it’s 5V supply, but do you usually set the current on a lab power supply or how does that work?

thank you in advance!

kevin
 

MrChips

Joined Oct 2, 2009
21,827
What is a CCA?
I am going to assume that you are using a lab bench power supply that allows you to set the voltage and current limits.
Make an estimate of the maximum current your load will require.
Set the PSU current limit to 20-50% above the maximum current.
For example, if the max load current is 100mA, set the limit to 150mA.
 

Thread Starter

Ryankevin1201

Joined Sep 1, 2020
4
What is a CCA?
I am going to assume that you are using a lab bench power supply that allows you to set the voltage and current limits.
Make an estimate of the maximum current your load will require.
Set the PSU current limit to 20-50% about the maximum current.
For example, if the max load current is 100mA, set the limit to 150mA.
Ok - circuit card assembly
 
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