fpga

[bashir2000]

Hello dear all

I have run into a problem regarding the FPGA. The FPGA output signal amplitude is 3.3, and to drive my switches, I need to increase the voltage up to 15 V. I am using TC4427(dual power mosfet driver)as a buffer after FPGA , and would like to check the possibility of my gate driver, but whenever I wanna check it, the FPGA pin is destroyed. I personally believe a resistance is required in series with the IC. Could you please give me a hand with this problem if you do not mind
I highly appreciate your prompt answer

Best Regards
Bashir

 

[glen herrmannsfeldt]

bashir2000 <user@compgroups.net/> wrote:

I have run into a problem regarding the FPGA. The FPGA output
signal amplitude is 3.3, and to drive my switches, I need to
increase the voltage up to 15 V. I am using TC4427(dual power
mosfet driver)as a buffer after FPGA , and would like to check
the possibility of my gate driver, but whenever I wanna check it,
the FPGA pin is destroyed. I personally believe a resistance is
required in series with the IC.

My first thought is that anyone who doesn't know enough electronics
to figure this out doesn't belong anywhere near and FPGA.

I hope the FPGAs aren't too expensive!

Could you please give me a hand with this problem if you do not mind?
I highly appreciate your prompt answer.

Well, it looks like the input to the TC4427 should be less than
one microamp, and that Vih of 2.4V should be fine. Vin is
allowed to go all the way up to Vdd (15V in your case), though
even so it would usually be that 3.3V would be fine.

I would triple check that you wired up the TC4427 right.
If you do it wrong, it might put 15V into the FPGA pin, which
would quickly destroy it.

If speed isn't to important, a resistor should be fine on
the output. With 12pF input capacitance, a resistor won't
slow you down too much, and will protect the FPGA. A big enough
resistor should protect you up to 15V.

-- glen

 

[RCIngham]

Hello dear all,

I have run into a problem regarding the FPGA. The FPGA output signa
amplitude is 3.3, and to drive my switches, I need to increase the voltag

up to 15 V. I am using TC4427(dual power mosfet driver)as a buffer afte
FPGA , and would like to check the possibility of my gate driver, bu
whenever I wanna check it, the FPGA pin is destroyed. I personally believ
a resistance is required in series with the IC. Could you please give me
hand with this problem if you do not mind?

I highly appreciate your prompt answer.

Best Regards,
Bashir

Reading the datasheet, I would not expect that a series resistor i
required, although one should not prove to be a problem (33 or 47 ohm
probably).

Double check the connections.

Could the MOSFET switching cause a power supply glitch to the FPGA?


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