Gents,
I'm looking for a high side IGBT gate driver for use with a 1000V bus voltage. I prefer something like an IR2110 but it is only rated for 600V.
Anything else out there besides gate drive transformers?
This is for a 3 phase AC induction motor inverter PWM switched at 10 -
20KHz.
Optoisolate, into a floating gate driver powered by a small dc/dc converter, maybe. Or use one of those slick ADuM series logic isolators, good for 5 KV.
Didn't HP/Agilent/Agere have some parts like that, too?
John
What's wrong with something like the IR2213?
Best regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Hi Mook,
Why not Gate transformers? The nice small ethernet transformers works great.
Marte
I didn't know IR made a 1200V high side gte driver. Last time I checked, they only carried 600V models.
thanks
Most of the ate transformers I've seen require 50KHz operation or higher. I didn't want to switch that high to minimize switching losses. I don't care if the motor whistles, no one will hear it.
Good idea, I will look into these. I guess I could use the same bootstrap circuit used on the ir2110 and charge a cap through a diode when the low side FET is on then use that cap as a floating supply.
They've been making 1200V parts for at least 8 years, and they include in their lineup complete three-phase chips (six drivers). The difficulty used to be finding distributor stock. DigiKey now has stock on the IR2130, IR2131, IR2132, IR2135 and IR2137. Some are available in 28-pin DIP packages.
Or buy a dip or sip $8 dc/dc converter.
John
Hi Mook,
If you spent the gate unit a little more than only the transformators windings then you will be able to switch a few Hz. I do this from near 0 Hz up to a few 100 kHz across a 5 kV barrier, OK here I don't use ethernet transformers, but for 1 kV they are OK easy available and cheap.
A very nice Appnote is AN461/0194 from ST. May be it is not exactly what you need, but the ideas behind this paper should lead you to a good solution. A good idea may also be the AN-950 from International rectifier.
Marte
I'm not going to bother looking myself but Unitrode came up with some transformer coupled frequency modulated power/pwm transmission system for IGBT drive type stuff.
TI bought them so if it is still made then......
Actually I will.... Here you go
UC3727..... New Chip Pair Provides Isolated Drive for High Voltage IGBTs
Whoops, link doesn't work.
Bum, anyway...... If they still make it you might find it.
DNA
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