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Participant mishra.pras
Participant
6,639 Views
Registered: ‎03-07-2011

XC3S200 getting heated up

Dear All,

 

I am using XILINX S3 FPGA XC3S200 on my board. Earlier it was working properly, but now it is getting heated up. Still it is working. I ahve checked for any short at the supply and it is not there.

 

 

 

What may be the reason. Please suggest.

Pras
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7 Replies
Teacher rcingham
Teacher
6,633 Views
Registered: ‎09-09-2010

Re: XC3S200 getting heated up

What did you do to it?
Have you connected the board to anything new?
Are the power supplies still the same voltages as before?

If the BIT file is the same but it is now running hotter, then the FPGA is probably damaged.

------------------------------------------
"If it don't work in simulation, it won't work on the board."
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Participant mishra.pras
Participant
6,624 Views
Registered: ‎03-07-2011

Re: XC3S200 getting heated up

My FPGA board is actually a daughter board to another board, and it is connected to several other boards through ports.

Bit file is same.

Voltge supplies are same as before.

Even when I am not using fpga and just power on the board, fpga gets heated up.

Imp thing is that when I use the fpga, it oprates in the desired manner.

 

Pras
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Xilinx Employee
Xilinx Employee
6,608 Views
Registered: ‎09-07-2009

Re: XC3S200 getting heated up

It seems some IOs are damaged. Maybe it is not fully damage but I think you'd better replace this chip.

These damages most are caused by ESD.

You didn't connect the FPGA to 5V IO, right?

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Newbie rushi_4007
Newbie
6,586 Views
Registered: ‎05-02-2012

Re: XC3S700 getting heated up

Hello,

 

I am using xc3s700an fpga it is also heating too much.

 

as per previous discussion assuming that some IO's got damaged I replaced the chip.

 

But then later I came to know that after programming .mcs file only it will start heating. so its not a power problem.

 

Can you please help me to overcome this problem?

 

For my fpga DAC,ADC,and some transceivers are interfaced directly. in few modules I am facing this problem.

 

Thanks..

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Participant mishra.pras
Participant
6,579 Views
Registered: ‎03-07-2011

Re: XC3S700 getting heated up

Some times the heating occurs when there is a wrong assingment on pins. I experienced a case where two devices were driving simultaneously on the same signal and the device was getting heated. In my case one of the power supply went wrong.

Pras
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Historian
Historian
6,569 Views
Registered: ‎02-25-2008

Re: XC3S700 getting heated up


@rushi_4007 wrote:

Hello,

 

I am using xc3s700an fpga it is also heating too much.

 

as per previous discussion assuming that some IO's got damaged I replaced the chip.

 

But then later I came to know that after programming .mcs file only it will start heating. so its not a power problem.

 

Can you please help me to overcome this problem?

 

For my fpga DAC,ADC,and some transceivers are interfaced directly. in few modules I am facing this problem.

 

Thanks..


Without knowing the details of your design, including how much of the FPGA's resources are used, and the clock frequency, it's entirely possible that you need to heatsink your FPGA. That is not uncommon. Use the power-estimator tool.

----------------------------Yes, I do this for a living.
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Adventurer
Adventurer
6,561 Views
Registered: ‎01-21-2011

Re: XC3S700 getting heated up

Sound like your output pin(s) have been short

 

try to reduce number of output (by half) to see if the heat goes away ?

 

 

 

 

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