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From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: OT: intelligent Power Device Meeets Space Challenged BLDC Motor Drive Needs
Date: Mon, 14 Oct 2024 13:05:43 -0400
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On Mon, 14 Oct 2024 08:23:40 -0700, john larkin <JL@gct.com> wrote:

>On Mon, 14 Oct 2024 11:38:51 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>Intelligent Power Device Meets Space-Challenged BLDC Motor-Drive Needs
>> https://www.electronicdesign.com/technologies/power/article/55234605/electronic-design-intelligent-power-device-meets-space-challenged-bldc-motor-drive-needs
>>  This IPD has a smaller package, more power, and smarter performance for BLDC motor drivers—what’s not to like?
>
>It uses IGBT technology, which I hadn't seen before in an IC.
>
>The operating voltage range is 50 to 450, which is interesting. It's
>slow, so it can slam motor windings but probably not PWM for
>microstepping.
>
>I'm doing a motor driver now, using the TI DRV8962. It's four channels
>of half-bridge, 4.5 to 65 volts, 10 amps per channel (!!) and it's
>pretty fast. I'm using a D-sub connector so I'll rate my outputs at 2
>amps.
>
>Various D25 suppliers claim 1, 2, or even 5 amps per pin.

Five amps on a D25 pin?  Machined one assumes.  Maybe not for long. Or
not with company.


>>More 
>>I was also very impressed with SpaceX landing their booter at the launch pad
>
>For sure. I'm impressed that it can lift enough fuel to do the powered
>landing. I guess there is substantial air friction decel on the way
>down.

It does get lots of aero braking.  On the video below, you can see the
speed dropping as it falls back to Earth.  And it now carries only
itself, the payload being far away.

..<https://www.cnn.com/2024/10/13/science/spacex-starship-test-flight-5-launch/index.html>

Joe Gwinn