FPGA power supply circuits

[Ben Popoola]

Hi,
SRAM FPGAs have a start-up current spike greater than 1A.
TI have a FPGA power supply document on their web site, that provides
various power supply circuits for FPGAs.

Questions:

(1) What is the minimum input current needed - from an off-the-shelf
power supply - for use with the TI circuits ?



Cheers

 

[Austin Lesea]

Ben,

Not all FPGAs have a startup current: specifically we fixed that
problem on Virtex II, Virtex II Pro, Virtex II Pro - X, and Spartan III.

Now "A" stands for "amperes."

We reviewed all of the TI material.

Austin

Ben Popoola wrote:

Hi,
SRAM FPGAs have a start-up current spike greater than 1A.
TI have a FPGA power supply document on their web site, that provides
various power supply circuits for FPGAs.

Questions:

(1) What is the minimum input current needed - from an off-the-shelf
power supply - for use with the TI circuits ?



Cheers

 

[Steven K. Knapp]

Slight correction. _Some_ SRAM FPGAs have a start-up current requirement,
sometimes called Power-On Surge (POS) current. Check the data sheet for
specific requirements.

Spartan-3 FPGAs, as an example, have no POS current. You just need to
supply at least the quiescent current.
---------------------------------
Steven K. Knapp
Applications Manager, Xilinx Inc.
General Products Division
Spartan-3/II/IIE FPGAs
http://www.xilinx.com/spartan3
---------------------------------
Spartan-3: Make it Your ASIC


"Ben Popoola" <b.popoola@ntlworld.com> wrote in message
news:c5qsbp$4orlv$2@ID-207836.news.uni-berlin.de...

Hi,
SRAM FPGAs have a start-up current spike greater than 1A.
TI have a FPGA power supply document on their web site, that provides
various power supply circuits for FPGAs.

Questions:

(1) What is the minimum input current needed - from an off-the-shelf
power supply - for use with the TI circuits ?



Cheers