Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

IRS2092 BTL from single supply
IRS2092 BTL from single supply
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
Thread Tools Search this Thread
Old 22nd February 2010, 05:35 AM   #1
Mark Kelly is offline Mark Kelly  Australia
diyAudio Member
Join Date: Feb 2006
Location: Willy, VIC
Default IRS2092 BTL from single supply

I have looked at the many threads on the IRS2092 and this doesn't appear to have been addressed.

I have been using Tripath T amp chips as driver amplifiers for small sinusoidal power supplies in multiphase motor drives for turntables. I wish to change and I am investigating using the IRS2092 driver chips and discrete MOSFets.

Can I run a pair of IRS2092 in BTL on a single supply? The existing motor drives use a single switchmode supply and I don't want to go bipolar if I don't have to.

Looking at AN1138, it looks as though I could reference the power reference plane to ground and the power ground plane separately to ground - in BTL there is no negative speaker reference so I just have to watch the ground reference of the output filter bypass caps. Since the inputs are all floating I'm assuming I just reference the input ground plane to the incoming signal from my existing frequency generator module.

Another question, I can't get IRFI4024s as used in IRAUDAMP7 at the moment. I was thinking of substituting IRFZ44Zs which seem to have appropriately low gate charge, Trr and RDS values. Has anyone tried these and found any problems?
  Reply With Quote
Old 25th February 2010, 04:35 AM   #2
MOER is offline MOER  United States
diyAudio Member
Join Date: Aug 2003
Default Irs2092

Do not use high gate charge FETs with IR chips. They run hot. There are several which we use from IR, Fairchild and Infineon.

Low Qg FEts work better and can tolerate 10 ohm gate resistors. FETs with Qg above 35 need lower gate resistors of <4.7R >2.2R

Steve Mantz
Zed Audio
  Reply With Quote
Old 16th August 2015, 12:06 PM   #3
Cuzziol is offline Cuzziol
diyAudio Member
Join Date: Mar 2010
Mark Kelly. good day.
I wonder if it was successful in its project with a single power source in IRS2092.
I'm worried about the GND. What was your solution ??
  Reply With Quote
Old 17th August 2015, 06:20 PM   #4
nigelwright7557 is offline nigelwright7557  United Kingdom
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
The irs2092 has quite a weak gate driver.
Much more than a irf4019 mosfet and it starts to fall apart.
You need external gate buffers to drive high gate capacitance mosfets.
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 17th August 2015, 06:30 PM   #5
CBS240 is offline CBS240  United States
diyAudio Member
CBS240's Avatar
Join Date: Aug 2005
Location: K-town
Something like these. CSD18534KCS
All the trouble I've ever been in started out as fun......
  Reply With Quote
Old 17th August 2015, 08:36 PM   #6
Cuzziol is offline Cuzziol
diyAudio Member
Join Date: Mar 2010
OK thank you.
I will do the testing this week
  Reply With Quote


IRS2092 BTL from single supplyHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
printer single supply becoming split supply? facundonu Power Supplies 2 16th November 2006 06:09 PM
How to split a single supply cm961 Parts 13 9th October 2004 03:17 PM
TDA729X single supply ? B.I.G Chip Amps 1 26th April 2004 04:37 PM
single supply for lm3886 xplod1236 Chip Amps 5 5th April 2004 01:03 AM
LM3886 single supply. unitgain Chip Amps 2 24th March 2004 12:10 PM

New To Site? Need Help?

All times are GMT. The time now is 04:18 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio