Can you explain how this (G-S diode) is supposed to work?  My gate=20
switching seems to be quite clean, so not sure what this will protect=20
against.
http://bit.ly/1Ywuwia



On 11/25/2015 2:45 AM, IVP wrote:
> In motor drives and for SMPS inductors I've always seen, and used, a=20
> power Schottky, as it's meant to conduct before the body diode. A=20
> large zener is comparitively slow because of its capacitance. The=20
> place I'd put a zener (generally 12 or 15V 0.5W in a 12V system) is g=20
> to s Typically the Schottky might be something like an STPS1545, where=20
> '15' is the amperage and '45' is the voltage. Manufacturer prefix=20
> varies, eg MBR, MBRB etc STSP1545=20
> http://www.st.com/web/en/resource/technical/document/datasheet/CD00000819=
..pdf=20
> On a couple of occassions I've had to add an ultrafast power diode,=20
> (eg MURxxx, BYVxx), and an RC snubber at the motor terminals to clean=20
> up some of the hash Joe ----- No virus found in this message. Checked=20
> by AVG - www.avg.com Version: 2016.0.7227 / Virus Database: 4460/11059=20
> - Release Date: 11/24/15=20

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