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Power Section Design Query

Janardan M80
Prodigy 70 points
Other Parts Discussed in Thread: TPS82130

Hi,

 I am basically a firmware engineer but trying to get into hardware  design as well now, so I have a basic question on power section.

In my scenario, I have a controller which would require 1A current  and a GPRS module which would need 2A at times.

While designing the power section what are the considerations I must follow? Please give me some points to start off.

Suppose some DC-DC converter says  that maximum current to be given at input of IC is  2A but if I connect say a adapter with current rating of 3A, what would be the result?

Thanks,

Janardan M

 

  • 0
    TI__Guru**** 150830 points
    Hi Janardan,

    Your adaptor current rating just needs to be above the current required by your load.

    You'll need an on-board DC/DC to supply your loads with a well-regulated enough voltage. The adaptor would power the DC/DC which would then power your load. The TPS82130 is a small and simple module that can operate from 5V or 12V adaptors. An adaptor cannot directly power your load, in most cases, since the voltage drop across the cable would cause the voltage at the load to be out of the load's accepted range.