1. Forum
  2. Usenet
  3. SCI.ELECTRONICS.DESIGN

  • Ping John Larkin - SiC FETs

    From John Smiht@21:1/5 to All on Mon Oct 23 11:52:40 2023
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to utube.jocjo@xoxy.net on Mon Oct 23 20:41:10 2023
    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    That is exactly the same SiC Fet, C2M0280120D, that I use in my 1400
    volt Pockels Cell driver. It has run at 4M pulses per second for
    months at a time, with no sign of fet degradation. It can do 1500 volt
    pulses, but only at 1 MHz. The fet seems to leak pretty seriously at
    about 1700 volts.

    http://www.highlandtechnology.com/DSS/T850DS.shtml

    https://www.dropbox.com/scl/fi/5arhyamrp0bl3tgb2fasn/DSC02771.JPG?rlkey=3ttcc2yt6s9nrtdouuv3aneol&raw=1

    I'm driving the gate hard, about +18 and -10. Pulsed drain current is
    huge, past the specified abs max for sure.

    Interesting, thanks.

    I don't look at Youtube much any more. My ad blockers quit working and
    the ads are too annoying.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to All on Mon Oct 23 20:46:54 2023
    On Mon, 23 Oct 2023 20:41:10 -0700, John Larkin <jl@997PotHill.com>
    wrote:

    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    That is exactly the same SiC Fet, C2M0280120D, that I use in my 1400
    volt Pockels Cell driver. It has run at 4M pulses per second for
    months at a time, with no sign of fet degradation. It can do 1500 volt >pulses, but only at 1 MHz. The fet seems to leak pretty seriously at
    about 1700 volts.

    http://www.highlandtechnology.com/DSS/T850DS.shtml

    https://www.dropbox.com/scl/fi/5arhyamrp0bl3tgb2fasn/DSC02771.JPG?rlkey=3ttcc2yt6s9nrtdouuv3aneol&raw=1

    I'm driving the gate hard, about +18 and -10. Pulsed drain current is
    huge, past the specified abs max for sure.

    Interesting, thanks.

    I don't look at Youtube much any more. My ad blockers quit working and
    the ads are too annoying.



    Given that gigantic package, there's not much inside.

    https://www.dropbox.com/scl/fi/awdq53p0as92hpsznpdsx/Cree_Chip.JPG?rlkey=bu95h94p3jxbamwkn72wcswz6&raw=1

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jeff Layman@21:1/5 to John Larkin on Tue Oct 24 08:49:13 2023
    On 24/10/2023 04:41, John Larkin wrote:
    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    That is exactly the same SiC Fet, C2M0280120D, that I use in my 1400
    volt Pockels Cell driver. It has run at 4M pulses per second for
    months at a time, with no sign of fet degradation. It can do 1500 volt pulses, but only at 1 MHz. The fet seems to leak pretty seriously at
    about 1700 volts.

    http://www.highlandtechnology.com/DSS/T850DS.shtml

    https://www.dropbox.com/scl/fi/5arhyamrp0bl3tgb2fasn/DSC02771.JPG?rlkey=3ttcc2yt6s9nrtdouuv3aneol&raw=1

    I'm driving the gate hard, about +18 and -10. Pulsed drain current is
    huge, past the specified abs max for sure.

    Interesting, thanks.

    I don't look at Youtube much any more. My ad blockers quit working and
    the ads are too annoying.

    I use Firefox or Pale Moon with the uBlock Origin add-on. I *never* see
    an advert when playing a YouTube video. As Google amends YouTube to get
    their ads through, so uBlock adds to its filters to stop them. Just
    allow uBlock to update automatically and you won't see another ad.

    --

    Jeff

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From piglet@21:1/5 to John Smiht on Tue Oct 24 11:35:03 2023
    On 23/10/2023 19:52, John Smiht wrote:
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    Interesting, thanks. How long before we see driver chips with built in
    gate leakage monitoring I wonder?

    piglet

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to All on Tue Oct 24 06:50:53 2023
    On Tue, 24 Oct 2023 08:49:13 +0100, Jeff Layman <Jeff@invalid.invalid>
    wrote:

    On 24/10/2023 04:41, John Larkin wrote:
    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    That is exactly the same SiC Fet, C2M0280120D, that I use in my 1400
    volt Pockels Cell driver. It has run at 4M pulses per second for
    months at a time, with no sign of fet degradation. It can do 1500 volt
    pulses, but only at 1 MHz. The fet seems to leak pretty seriously at
    about 1700 volts.

    http://www.highlandtechnology.com/DSS/T850DS.shtml

    https://www.dropbox.com/scl/fi/5arhyamrp0bl3tgb2fasn/DSC02771.JPG?rlkey=3ttcc2yt6s9nrtdouuv3aneol&raw=1

    I'm driving the gate hard, about +18 and -10. Pulsed drain current is
    huge, past the specified abs max for sure.

    Interesting, thanks.

    I don't look at Youtube much any more. My ad blockers quit working and
    the ads are too annoying.

    I use Firefox or Pale Moon with the uBlock Origin add-on. I *never* see
    an advert when playing a YouTube video. As Google amends YouTube to get
    their ads through, so uBlock adds to its filters to stop them. Just
    allow uBlock to update automatically and you won't see another ad.

    That seems to work. Thanks.

    Embedded ads, just part of the video, are easy to skip.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Smiht@21:1/5 to piglet on Tue Oct 24 09:16:19 2023
    On Tuesday, October 24, 2023 at 5:35:12 AM UTC-5, piglet wrote:
    On 23/10/2023 19:52, John Smiht wrote:
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)
    Interesting, thanks. How long before we see driver chips with built in
    gate leakage monitoring I wonder?

    piglet

    I'm pretty sure that you know that I am not even nearly qualified to answer that question. I can't even speculate on it.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to All on Tue Oct 24 10:00:36 2023
    On Tue, 24 Oct 2023 11:35:03 +0100, piglet <erichpwagner@hotmail.com>
    wrote:

    On 23/10/2023 19:52, John Smiht wrote:
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    Interesting, thanks. How long before we see driver chips with built in
    gate leakage monitoring I wonder?

    piglet

    Probably never. The driver shouldn't damage the fet, and if it did see
    leakage, what should it do?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to jl@997PotHill.com on Wed Oct 25 04:34:01 2023
    On a sunny day (Tue, 24 Oct 2023 10:00:36 -0700) it happened John Larkin <jl@997PotHill.com> wrote in <qvtfji54bgceffb6t7qu6i2jla54uhkd18@4ax.com>:

    On Tue, 24 Oct 2023 11:35:03 +0100, piglet <erichpwagner@hotmail.com>
    wrote:

    On 23/10/2023 19:52, John Smiht wrote:
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that
    matter)

    Interesting, thanks. How long before we see driver chips with built in
    gate leakage monitoring I wonder?

    piglet

    Probably never. The driver shouldn't damage the fet, and if it did see >leakage, what should it do?


    Sent a voice message to your cellphone?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From piglet@21:1/5 to John Larkin on Tue Oct 24 19:01:18 2023
    On 24/10/2023 18:00, John Larkin wrote:
    On Tue, 24 Oct 2023 11:35:03 +0100, piglet <erichpwagner@hotmail.com>
    wrote:

    On 23/10/2023 19:52, John Smiht wrote:
    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    Interesting, thanks. How long before we see driver chips with built in
    gate leakage monitoring I wonder?

    piglet

    Probably never. The driver shouldn't damage the fet, and if it did see leakage, what should it do?


    Assert an IRQ so the WiFi IOT device calls home AWS and Alexa hollers
    out: "Your wallwart is wearing out. I am selling you a new unit, the
    drone will be with you in 45 minutes." :>

    piglet

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to utube.jocjo@xoxy.net on Wed Oct 25 11:56:55 2023
    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)

    Tests on two devices at two different temperatures is
    largely meaningless.

    The presenting the full results might make more sense.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to utube.jocjo@xoxy.net on Wed Oct 25 12:00:33 2023
    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)


    EPC employs pulse testing to determine reliability.

    https://epc-co.com/epc/DesignSupport/eGaNFETReliability/ReliabilityReportPhase14.aspx

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to legg@nospam.magma.ca on Thu Oct 26 05:06:21 2023
    On a sunny day (Wed, 25 Oct 2023 12:00:33 -0400) it happened legg <legg@nospam.magma.ca> wrote in <dpeiji107glkvnbp920osuko256lqm6ifo@4ax.com>:

    On Mon, 23 Oct 2023 11:52:40 -0700 (PDT), John Smiht
    <utube.jocjo@xoxy.net> wrote:

    I have not finished watching this but I will give you the link anyway:

    https://www.youtube.com/watch?v=CnpqkuHU0pc

    Concerns degradation of SiC FETs under pulse conditions. I hope this is interesting for you. (or anyone else, for that matter)


    EPC employs pulse testing to determine reliability.

    https://epc-co.com/epc/DesignSupport/eGaNFETReliability/ReliabilityReportPhase14.aspx

    Thank you, nice report.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)