Den fredag den 15. maj 2015 kl. 04.58.36 UTC+2 skrev John Larkin:> On Thu, 14 May 2015 16:55:06 -0700 (PDT), > lasselangwadtchristensen@gmail.com wrote: > > >Den torsdag den 14. maj 2015 kl. 23.53.37 UTC+2 skrev Tomas D.: > >> > I don't have the measurements, but it seems like it's a very common cooler > >> > among motherboards: > >> > http://www.ixbt.com/mainboard/msi/k9n4-sli/cooler.jpg > >> > >> > >> Here it is: > >> http://www.aliexpress.com/item/Northbridge-motherboard-graphics-heatsink-6cm-pitch-40-40MM-ultra-quiet-fan/1714057574.html > >> > >> Maybe fits the size? > >> > >> Regards > >> Tomas D. > > > >not even close > > > >the mounting fan holes on the Microzed is 2mm, and the diagonal spacing > >is ~31.5mm, that is some where between a 25x25mm and 30x30mm fan > > > >and the heatsink has to fit in a ~17x17mm footprint because there are caps > >that are taller than the Zynq right next to it > > The hole spacing may be English units, namely 1.25"yeh, but they aren't normally spec'ed by the diagnal> I did look at a lot of CPU cooler fans. There are many, many hole > spacings, except that one.yeh, a 25x25 fan is 20x20 holes, a 30x30 is 24x24mm the microzed need ~22x22 mm> > We'll just order a bucket of those adapter plates and get on with our > lives.I'd make the plate bigger so it could use the four mounting holes, those 2mm holes are bit small> > We're gluing a Cool Innovations pin-fin sink to the top of the FPGA > and blowing air down on that. > > Without the forced air, the pin fins are useless. But the base of the > heat sink spreads heat laterally out from the central hot-spot (a flat > metal plate works the same) and cuts junction temp by 5C or so. >we have a fan mounted vertically in our box so it blows air across the top and bottom of the PCB, even with out a heatsink I think it drops the temp 20'C -Lasse
ZYNQ temperature
Started by ●May 11, 2015
Reply by ●May 15, 20152015-05-15
Reply by ●May 15, 20152015-05-15
> Without the forced air, the pin fins are useless. But the base of the > heat sink spreads heat laterally out from the central hot-spot (a flat > metal plate works the same) and cuts junction temp by 5C or so.It seems like the best solution for you would be your own board. Maybe worth outsourcing that? You know you're overpaying for that board from Avnet, plus that heatsink solution... Not technological I'd say. Tomas D.
Reply by ●May 15, 20152015-05-15
Den fredag den 15. maj 2015 kl. 14.38.01 UTC+2 skrev Tomas D.:> > Without the forced air, the pin fins are useless. But the base of the > > heat sink spreads heat laterally out from the central hot-spot (a flat > > metal plate works the same) and cuts junction temp by 5C or so. > > It seems like the best solution for you would be your own board. Maybe worth > outsourcing that? You know you're overpaying for that board from Avnet, plus > that heatsink solution... Not technological I'd say. > > Tomas D.Depends on how many you need The pcb needs blind microvias, 8~10 layers, tracks to DDR RAM need to be matched to a few millimeters. So before you have made the layout and sourced all the components and have the thing build the microzed might seem like a bargain. -Lasse
Reply by ●May 15, 20152015-05-15
On Fri, 15 May 2015 13:37:58 +0100, "Tomas D." <mailsoc@gmial.com> wrote:>> Without the forced air, the pin fins are useless. But the base of the >> heat sink spreads heat laterally out from the central hot-spot (a flat >> metal plate works the same) and cuts junction temp by 5C or so. > >It seems like the best solution for you would be your own board. Maybe worth >outsourcing that? You know you're overpaying for that board from Avnet, plus >that heatsink solution... Not technological I'd say. > >Tomas D. >The uZed makes sense for low-volume, complex, relatively high-priced products, 10 to maybe 50 units a year. It has the SOC, flash, SDcard, DRAM, gB Ethernet, USB, power supplies, Linux, all that done and working. The two boxes that we've done used all of that stuff. The real downside is the ghastly Xilinx development software and horrible support. Future simpler products that have volume potential, we'll probably switch over from our current habits (separate NXP ARM and Altera chips) to an Altera SOC, now that they are available. https://dl.dropboxusercontent.com/u/53724080/PCBs/TEM2_FPGA.jpg The two-chip thing works, but it wastes a lot of FPGA balls to provide CPU access, and the FPGA register access is only 16 bits wide, asynchronous and slow. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●May 15, 20152015-05-15
> The uZed makes sense for low-volume, complex, relatively high-priced > products, 10 to maybe 50 units a year. It has the SOC, flash, SDcard, > DRAM, gB Ethernet, USB, power supplies, Linux, all that done and > working. The two boxes that we've done used all of that stuff. The > real downside is the ghastly Xilinx development software and horrible > support. > > Future simpler products that have volume potential, we'll probably > switch over from our current habits (separate NXP ARM and Altera > chips) to an Altera SOC, now that they are available. > > https://dl.dropboxusercontent.com/u/53724080/PCBs/TEM2_FPGA.jpg > > The two-chip thing works, but it wastes a lot of FPGA balls to provide > CPU access, and the FPGA register access is only 16 bits wide, > asynchronous and slow.We use Altera Cyclone V SoC for automotive and so far - it's great. I can't tell about reliability yet, but the support from Altera was amazing. We've got exactly zero from X. Tomas D.
Reply by ●May 15, 20152015-05-15
On Fri, 15 May 2015 22:40:44 +0100, "Tomas D." <mailsoc@gmial.com> wrote:>> The uZed makes sense for low-volume, complex, relatively high-priced >> products, 10 to maybe 50 units a year. It has the SOC, flash, SDcard, >> DRAM, gB Ethernet, USB, power supplies, Linux, all that done and >> working. The two boxes that we've done used all of that stuff. The >> real downside is the ghastly Xilinx development software and horrible >> support. >> >> Future simpler products that have volume potential, we'll probably >> switch over from our current habits (separate NXP ARM and Altera >> chips) to an Altera SOC, now that they are available. >> >> https://dl.dropboxusercontent.com/u/53724080/PCBs/TEM2_FPGA.jpg >> >> The two-chip thing works, but it wastes a lot of FPGA balls to provide >> CPU access, and the FPGA register access is only 16 bits wide, >> asynchronous and slow. > >We use Altera Cyclone V SoC for automotive and so far - it's great. I can't >tell about reliability yet, but the support from Altera was amazing. We've >got exactly zero from X. > >Tomas D. >Good news. That's probably our future path. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
