Diode data --> SPICE model

[Mike Rocket J. Squirrel E]

I'd like to have a SPICE model of the Philips BYX90G High-voltage
soft-recovery controlled avalanche rectifier. Philips doesn't provide a
model.

I usually use the old SPICEMOD program that I retained from my Intusoft
days to make models of diodes from data sheets. But Spicemod is choking
on the data for this part. The forward voltage drop makes it very unhappy.

The data sheet is at:

http://www.semiconductors.philips.com/acrobat/datasheets/BYX90G_2.pdf

Maybe someone has the magic skills to turn this data into a model? I'm
not nearly bright enough to make a model of a diode from a data sheet --
how many people are? (It's not a rhetorical question; I really wonder).

Even a model of a similar part would be fine for my simulation.

--
Mike "Rocket J Squirrel" Elliott
71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer)

 

[analog]

"Mike Rocket J. Squirrel Elliott" wrote:

I'd like to have a SPICE model of the Philips BYX90G High-voltage
soft-recovery controlled avalanche rectifier. Philips doesn't provide a
model.

I usually use the old SPICEMOD program that I retained from my Intusoft
days to make models of diodes from data sheets. But Spicemod is choking
on the data for this part. The forward voltage drop makes it very unhappy.

The data sheet is at:

http://www.semiconductors.philips.com/acrobat/datasheets/BYX90G_2.pdf

Maybe someone has the magic skills to turn this data into a model? I'm
not nearly bright enough to make a model of a diode from a data sheet --
how many people are? (It's not a rhetorical question; I really wonder).

Even a model of a similar part would be fine for my simulation.

High voltage diodes are invariably diode strings. This one may contain
as many as 20 diodes as can be seen by the very high forward voltage.

The following sub circuit should likely provide what you seek:

..subckt BYX90G_2 1 2
..param n=12 ; number of diodes in string
..model Dn D(Is=10n Rs={2/n} n={20/n} Cjo={10p*n} tt=350n BV={9k/n} IBV=.1m)
D1 1 x Dn
E1 x 2 1 x {n-1}
..ends BYX90G_2

Just place a normal diode on the LTspice schematic, ctrl-right-click
on it and change the fields to make it refer to this sub circuit (as
explained in the help file).

 

[Mike Rocket J. Squirrel E]

analog wrote:

"Mike Rocket J. Squirrel Elliott" wrote:


I'd like to have a SPICE model of the Philips BYX90G High-voltage
soft-recovery controlled avalanche rectifier. Philips doesn't provide a
model.

I usually use the old SPICEMOD program that I retained from my Intusoft
days to make models of diodes from data sheets. But Spicemod is choking
on the data for this part. The forward voltage drop makes it very unhappy.

The data sheet is at:

http://www.semiconductors.philips.com/acrobat/datasheets/BYX90G_2.pdf

Maybe someone has the magic skills to turn this data into a model? I'm
not nearly bright enough to make a model of a diode from a data sheet --
how many people are? (It's not a rhetorical question; I really wonder).

Even a model of a similar part would be fine for my simulation.


High voltage diodes are invariably diode strings. This one may contain
as many as 20 diodes as can be seen by the very high forward voltage.

The following sub circuit should likely provide what you seek:

.subckt BYX90G_2 1 2
.param n=12 ; number of diodes in string
.model Dn D(Is=10n Rs={2/n} n={20/n} Cjo={10p*n} tt=350n BV={9k/n} IBV=.1m)
D1 1 x Dn
E1 x 2 1 x {n-1}
.ends BYX90G_2

Just place a normal diode on the LTspice schematic, ctrl-right-click
on it and change the fields to make it refer to this sub circuit (as
explained in the help file).

A big tip o' the hat and a hearty "thank you" for the help!

--
Mike "Rocket J Squirrel" Elliott
71 VW Type 2 -- the Wonderbus (AKA the Saunabus in summer)