Sundance SMT166 - Manual (Page 16)

4.2.2 FPGAs
Virtex6 FPGAs offer good features for this design such as high-performance logic, a
great number of IOs per package, the capability of driving some DDR3 memory, PCI
Express endpoints, GTX transceivers for serial connectivity, LVDS IOs, built-in
memory blocks, internal clock managers and integrated TEMACs.
The SMT166 features two Virtex6 FPGAs in an FF1156 package that can be LX130T,
LX195T, LX240T, LX365T, SX315T or SX475T. All parts are footprint compatible.
4.2.2.1 FPGA Power supplies
FPGAs have got their internal core powered at 1.0 Volt (Vccint). IOs will be powered
under 3.3, 2.5 or 1.5 Volts (Vcco). Below are shown the quiescent currents for each
part.
FPGA
Quiescent
Vccint
(amps)
Quiescent
Vccaux
(amps)
LX130T 1.6 0.08
LX195T 2.0 0.12
LX240T 2.4 0.14
LX365T 3.0 0.19
SX315T 3.5 0.20
SX475T 5.2 0.28
Figure 6 - FPGA power requirement.
We can estimate that each FPGA core (Vccint) could require up to 16Amps. The
auxiliary (Vccaux) rail is likely to take up to 2 Amps.
DDR3 IOs can be powered by from the DDR3 main supply and only driving outputs
are drawing current.
A 20-amp power module for each FPGA Core voltage should be sufficient to cover
all needs.
There are 3 speed grades available, -1, -2 and -3 (fastest). The SX475T is not
available in the -3 speed grade (as of Nov 2011).
Product Specification SMT166 Page 16 of 44 Last Edited: 17/06/2014 16:12:00