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 -
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
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
Have something to add? Share your thoughts — no account required.
Ask the community — no account required