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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Fri, 06 Sep 2024 19:15:08 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: The other power transistor aiming to dominate the age of SiC Date: Fri, 06 Sep 2024 12:15:28 -0700 Message-ID: References: <27fac019-cd2d-b203-65aa-a4fb38394bae@electrooptical.net> User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Lines: 68 X-Trace: sv3-CgZi1RFCUdOUdMK95sng89F1z4OQIeNhuzv6JxZYZsH6/EQ7A6lrPEvT7iRo+uQq0x1IDEAUeI16unC!7flNU0+2fMtmnoyZOxDFATxkfjDv6JLLTZve1KcTz7xxSS6MzEnar9xQ79NmaZQsbxxaLgYICpfx!7Vh93to= X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3750 On Fri, 6 Sep 2024 13:36:24 -0400, Phil Hobbs wrote: >On 2024-09-06 13:28, john larkin wrote: >> On Fri, 6 Sep 2024 15:08:33 -0000 (UTC), Phil Hobbs >> wrote: >> >>> john larkin wrote: >>>> On Fri, 06 Sep 2024 10:13:44 GMT, Jan Panteltje >>>> wrote: >>>> >>>>> The Other Power Transistor Aiming to Dominate the Age of SiC >>>>> https://www.electronicdesign.com/technologies/power/article/55138019/qorvo-optimizing-high-density-power-with-sic-devices-and-advanced-circuit-design >>>>> Explore the integration of silicon-carbide (SiC) technology and advanced >>>>> circuit design to enhance the overall density and efficiency of power converters. >>>>> See also: >>>>> https://www.qorvo.com/products/power-solutions/sic-fets >>>>> >>>> >>>> I used a Cree SiC fet, in my Pockels Cell driver. As a high-voltage >>>> switch, the figure of merit Rdson * Cout was many times better >>>> than I could get with any silicon mosfets. The circuit wouldn't have >>>> worked with silicon. >>>> >>>> But driving the gate was a real nuisance. I went from -5 to +18 in a >>>> couple of nanoseconds, which took a special GaN driver circuit on its >>>> own baby board, >>>> >>>> https://www.dropbox.com/scl/fi/y3r0qyo0hkubpc9td02y1/T852C_globbed.JPG?rlkey=gbkhx5zwaisr7e84acf5kuv80&raw=1 >>>> >>>> The glob-top is mostly to protect the absurdly fragile EPC GaN fets, >>>> and give them a bit of extra cooling. Finding the right glob stuff was >>>> a project of its own. >>>> >>>> There are beginning to be some specific SiC gate drivers, but the >>>> market seems to be power conversion, so the drivers are fairly slow >>>> and have gigantic prop delays. >>>> >>>> I note that EPC said that they would never sell packaged parts, but >>>> now they do. >>>> >>>> >>> >>> I used to have an AD databook with an index. The entry for “digital” was >>> “You must be joking.” >>> >>> Cheers >>> >>> Phil Hobbs >> >> Rumor has it that Intel is about to introduce a new line of opamps. >> > >Those poor guys are lucky to get anything to work these days. Boeing, >Intel, Volkswagen, who's next? > >Financialization and ESG towards a better world, excelsior! > >(Not so much.) > >Cheers > >Phil Hobbs Intel just got billions of bucks from the Feds to stay competitive in semiconductors. They have spent about $100 billion so far on stock buybacks.