Isolated gate drive IC is finally HERE!! - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th September 2008, 06:31 AM   #1
diyAudio Member
 
Join Date: Sep 2005
Default Isolated gate drive IC is finally HERE!!

Sorry if this is old news to you, but I thought that this product would be of use to anyone interested in:

Class-D amplifiers

Switchmode power supplies

Anything that requires a "high side" gate drive for a high side transistor (or any power transistor switch that does not have its source referenced to ground)

Look at the ADUM6132 from Analog Devices:
http://www.analog.com/static/importe...s/ADuM6132.pdf

All you have to do is provide it with:

[1] Ground referenced power supplies of 5V and 15V (the 15V supply may not even be needed - see datasheet)

[2] Ground referenced switching inputs ("switch gate on" or "switch gate off", standard 5V logic will do)

[3] Two "current buffer" transistors (NPN and PNP) - as the isolated output is only rated for up to 200mA in short transients (source or sink), the datasheet recommends adding an extra discrete buffer pair to the output for transient gate driving currents exceeding half an amp or so. This is often the case when using IGBTs and beefy MOSFETs.

[4] Proper decoupling capacitors

That's it! The high side floating supply voltage and gate drive voltage are made for you! No more need for expensive optocouplers to isolate your logic signal to your high side transistor switch!

Disclaimer: I, in no way, work for, or am paid to endorse Analog Devices products. I'm mentioning this particular product because it's about time something like this showed up!
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need SMPS Gate Drive Transformer infinia Power Supplies 3 10th March 2009 03:51 PM
Gate Drive Transformer microsim444 Everything Else 1 2nd December 2008 12:52 PM
Isolated gate driver with adjustable dead band winny Power Supplies 3 14th August 2008 03:19 PM
Gate drive transformers? Loial Power Supplies 3 18th October 2005 09:17 AM


New To Site? Need Help?

All times are GMT. The time now is 02:22 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2