REGISTER | LOGIN
Breaking News
Comments
Oldest First | Newest First | Threaded View
<<   <   Page 3 / 3
Sanjib.A
User Rank
Author
Re: Very much useful
Sanjib.A   9/11/2013 1:02:56 PM
NO RATINGS
Hi Max, Thanks a lot for sharing the guide. This is a pretty elaborated description about the calibration methodology and the advantages of the newer devices with advanced current sensing technique, which make the calibration easier. I am also impressed to see the option for "no calibration", where the "typical" slope and offset correction factors could be used from the datasheet instead of adding a calibration process during production...this is good for the application where accuracy is not that important. Thanks!

Max The Magnificent
User Rank
Author
Re: Very much useful
Max The Magnificent   9/11/2013 1:28:50 PM
NO RATINGS
@Sanjib.A: Hi Max, Thanks a lot for sharing the guide.

It's my very great pleasure -- I think it contains a lot of useful information.

Brian@BDH
User Rank
Author
Re: Another approach to current monitor
Brian@BDH   9/11/2013 3:58:31 PM
NO RATINGS
 

@Aubrey: Re: Do you know if there is a data sheet available? Perhaps it is still preliminary.

Yes, the datasheet is in Max's inbox - I asked him to forward it to you since I didn't have your email address readily available :-) 

Correct, the part does not launch in production until Dec13/Jan14, so the datasheet is still a Target datasheet and the Final datasheet has not been released on the website yet.  However, samples are available!

 

salbayeng
User Rank
Author
smart PWM "mosfets"
salbayeng   11/21/2013 7:29:49 AM
NO RATINGS
Hi Aubrey , 

More good stuff in your blog as always.

Unfortunate that the only units with status indication, the ZXMS6002G and ZXMS6003G have a feeble 500mohm  Rds , what kind of automative load only uses 1A? , heck a simple PTC placed in close proximity to the MOSFET tab would provide sufficient protection for a 12v / 1A load.

Have you seen the DRV101 , in a TO220 5pin  package , meant for solenoid driver, hits it hard at first then throttles back to PWM, interestingly it has a fault output for both under and overcurrent. 

http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=drv101&fileType=pdf 

I've also looked at using the UC2845 (usually a current mode flyback PWM driver) driving any old mosfet. If you average the PWM signal (while it's running closed loop)   as an analog voltage , you can determine whether it is open or short circuit. But it won't go to 100% duty so only good for bulbs and coils / motors.

Underdriving the gate is a big MOSFET killer , so some kind of de-saturation detector would be helpful.

antedeluvian
User Rank
Author
Re: smart PWM "mosfets"
antedeluvian   11/21/2013 9:42:26 AM
NO RATINGS
salbayeng

I've also looked at using the UC2845 (usually a current mode flyback PWM driver) driving any old mosfet. If you average the PWM signal (while it's running closed loop)   as an analog voltage , you can determine whether it is open or short circuit.

This is a great idea. You shoul;d submit it to EDN's Design Ideas- make yourself a few bucks.

 

Have you seen the DRV101

Thnaks for the pointer. I recently saw a TI part, but was only rated to 20V, for automotive applications. This one I can use!

<<   <   Page 3 / 3


Like Us on Facebook
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Test Tool Finds Ethernet Wiring Errors
Martin Rowe
Post a comment
When my house was renovated several years ago, I had the electrician install network outlets in numerous places, then run the LAN cables to a wiring closet. But he didn't document the ends ...

Martin Rowe

Local Electronics Store Supplies Engineers and Hobbyists
Martin Rowe
5 comments
Rochester, N.Y. — Tucked away in this western New York city known for its optics is Goldcrest Electronics, a local store that's supplied businesses and individuals with electronic ...

Martin Rowe

How to Transform a Technology University (Book Review)
Martin Rowe
1 Comment
The Presiding Genius of the Place by Alison Chisolm. WPI, Worcester, Mass., 234 pp., 2016. Engineers love to discuss, and often criticize, engineering education. They often claim ...

Max Maxfield

Aloha from EEWeb
Max Maxfield
Post a comment
Just a few minutes ago as I pen these words, I posted this blog about this month's Cartoon Punchline Competition over on EEWeb.com.