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
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.
Aust> Hi,
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
--------------------------------- Spartan-3: Make it Your ASIC
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