Here is a schematic and board design that can be used to build a replica of ZFF's current sensing PWM. The board is designed using ExpressPCB, and is speced to use their double sided micro prototyping service. 2 PCBs fit to one board, with a set order size of 3 boards.

I've used 0805 sized surface mount components extensively to minimize overall size. The larger components will remain off board, so it will be up to the assembler to figure out how to add these components. The mosfet, opamp and voltage regulator is on board, and remains through hole form factors, with the mosfet footprint enlarged to a TO-247.

Views: 44

Attachments:

Replies to This Discussion

I forgot to mention that the current sensing resistor is a 2512 footprint. Given the power trace sizes, this should be good for ~5-10 amps RMS.

RSS

*** Translate HODINFO ***

Latest Activity

Meryn Mckenzie is now a member of HODINFO
Wednesday
Jim Mitchell commented on Jim Mitchell's blog post 'Electronysis a Spectacular new Vernacular page 2'
Sep 14
gabet123 replied to gabet123's discussion 'Spammer Alert'
Sep 14
Jeremy Dukes commented on Jim Mitchell's blog post 'Electronysis a Spectacular new Vernacular page 2'
Sep 13
Jeremy Dukes favorited Jim Mitchell's blog post Electronysis a Spectacular new Vernacular page 2
Sep 10
Jeremy Dukes favorited Jim Mitchell's blog post Electronysis a Spectacular new Vernacular page 2
Sep 10
Jim Mitchell commented on Jim Mitchell's blog post 'Electronysis a Spectacular new Vernacular page 2'
Sep 10
Jeremy Dukes commented on Jim Mitchell's blog post 'Electronysis a Spectacular new Vernacular page 2'
Sep 9
Jim Mitchell posted a blog post
Sep 9
Jeremy Dukes commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 7
Jaco Bezuidenhout commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 7
Jim Mitchell commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 6
Jim Mitchell commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 6
Jim Mitchell commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 6
Jaco Bezuidenhout commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 6
Jeremy Dukes commented on Jim Mitchell's blog post 'Electronyisis A Spectacular New Vernacular.'
Sep 5

© 2018   Created by gabet123.   Powered by

Badges  |  Report an Issue  |  Privacy Policy  |  Terms of Service

Live Chat