[SI-LIST] Re: Power module
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 04 Jun 2012 10:33:19 -0700
There are more than one type of currents. The one your power supply
needs to handle without collapse is the peak current. The peak current
can occur under several different conditions. One of the most common is
turn-on where you need to account for capacitor charging current during
the turn-on voltage ramp.
Steve.
On 6/3/2012 10:18 PM, Rahul Rajendran wrote:
> Hi,
> I have to choose some power modules for my board. My point is when ever i
> have looked up boards they have used power modules with more current than
> the maximum current requirement for the target module. Say for example , If
> i want provide a module for RAM , DDR3 UDIMM , the typical ratings are 1.5
> V and 3 A. But the modules used have been designed to give more current.
> Can some one give a reason for this over design. And how much percentage
> should we over estimate the max current value
>
>
>
> Rahul R
>
>
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--
Steve Weir
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