[SI-LIST] Re: SPARTAN IIE Voltage regulator selection
- From: plawler@xxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 25 Oct 2002 09:33:31 -0700
I worked as a power supply engineer several years ago for a company that =
used
gate arrays.
During the design phase of their hand held device, a new revision of gate=
array
would not start properly, and caused the power supply to shut down =
immediately.
However, when the battery option was used, the system would work fine.
It turned out there was a mistake in the reset programming in the new =
revision
gate array that caused all the totem-pole outputs to conduct at turn-on, =
putting
a short across the bus. The power supply reacted to the over-current =
condition,
while the battery would 'ride though' the surge.
I suggest you carefully review the manufacturers's recommendations for =
reset
programming, and the specification for startup current before you change =
voltage
regulators.
On Fri, 25 Oct 2002 17:23:53 +0530, ismailb@xxxxxxxxxxxxxxx wrote:
>I want to know if anyone used SPARTAN IIE FPGA in any of their design. =
It seems that
>the FPGA draws a high current during start up which appers almost like a=
short circuit=20
>I am in the process of selecting an appropriate Voltage regulator but =
not sure how good=20
>it will be. My worst fear is that once the Voltage regulator senses the =
high current draw=20
>it may shutdown. It will be of great help if anyone could provide the =
part number/manfacturer
> of Voltage regulator used in their earlier (working :) ) design.
----
Patrick Lawler
plawler@xxxxxxxx
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