IR is insane
in [Design]
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From: John Larkin on 18 Mar 2010 18:58 Just got a short-form IR mosfet thing in the mail. They have a PQFN 5x6 mm package they rate at 104 amps. And a D2PAK rated for 340 amps. John
From: Damon Hill on 18 Mar 2010 19:02 John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in news:cpb5q5p2013r34ainnmcrdfjml4ifvp03g(a)4ax.com: > Just got a short-form IR mosfet thing in the mail. > > They have a PQFN 5x6 mm package they rate at 104 amps. And a D2PAK > rated for 340 amps. Hmm. Define 'continuous'. (a >very< short pulse rating I'd believe) --Damon
From: Tim Williams on 18 Mar 2010 19:39 I wonder if any end user actually tries building the nucleated boiling heatsink to use those things at ratings. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:cpb5q5p2013r34ainnmcrdfjml4ifvp03g(a)4ax.com... > Just got a short-form IR mosfet thing in the mail. > > They have a PQFN 5x6 mm package they rate at 104 amps. And a D2PAK > rated for 340 amps. > > John >
From: John Larkin on 18 Mar 2010 20:19 On Thu, 18 Mar 2010 18:02:27 -0500, Damon Hill <damon16ONE(a)comcast.not> wrote: >John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >news:cpb5q5p2013r34ainnmcrdfjml4ifvp03g(a)4ax.com: > >> Just got a short-form IR mosfet thing in the mail. >> >> They have a PQFN 5x6 mm package they rate at 104 amps. And a D2PAK >> rated for 340 amps. > >Hmm. Define 'continuous'. (a >very< short pulse rating I'd believe) > The flyer doesn't mention pulsing. The D2PAK datasheet pulsed current rating is 1080 amps. http://www.irf.com/product-info/datasheets/data/irfs3006pbf.pdf The flyer claims 340 amps. The datasheet says 270 amps but "package limited" to 195. I don't believe any of them. The datasheet also claims 375 watts power dissipation... in a D2PAK! John
From: John Fields on 18 Mar 2010 20:37
On Thu, 18 Mar 2010 17:19:12 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >On Thu, 18 Mar 2010 18:02:27 -0500, Damon Hill ><damon16ONE(a)comcast.not> wrote: > >>John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >>news:cpb5q5p2013r34ainnmcrdfjml4ifvp03g(a)4ax.com: >> >>> Just got a short-form IR mosfet thing in the mail. >>> >>> They have a PQFN 5x6 mm package they rate at 104 amps. And a D2PAK >>> rated for 340 amps. >> >>Hmm. Define 'continuous'. (a >very< short pulse rating I'd believe) >> > >The flyer doesn't mention pulsing. The D2PAK datasheet pulsed current >rating is 1080 amps. > >http://www.irf.com/product-info/datasheets/data/irfs3006pbf.pdf > >The flyer claims 340 amps. The datasheet says 270 amps but "package >limited" to 195. I don't believe any of them. > >The datasheet also claims 375 watts power dissipation... in a D2PAK! --- Maybe they're talking power dissipation in the load with the switch saturated, like TI used to in the late 50's and early 60's. In any case, if you don't believe it why don't you build something to prove your point instead of just flapping your gums, as usual? JF |