Author Topic: UCC5304DWVR to mosfet over populated with not neede components help  (Read 226 times)

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Offline john23Topic starter

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Hello,I have a circuit shown in the attached photo which basicly shows UCC5304 powering a mosfet using floating voltage.
My circuit basicly uses figure 22 of the attached datasheet.
I know that they put too much capacitors and i am sure i need the diode structrue.
basickly we put capacitors to to stabilise voltage supply and reduce noise.
any reccomendation regarding what capacitors to put in the structure?
 
https://www.ti.com/lit/ds/symlink/ucc5304.pdf?ts=1719651132605
https://www.mouser.com/datasheet/2/196/Infineon_IRF7821_DataSheet_v01_01_EN-3363012.pdf
 

Offline T3sl4co1l

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Re: UCC5304DWVR to mosfet over populated with not neede components help
« Reply #1 on: June 30, 2024, 01:10:09 pm »
First things first -- what are the design goals? V, I ratings? Switching speed / edge rate? Frequency / rep rate? What is the load? What will the layout look like?  What is the supply, will it care about noise? How much, in what frequency bands?

Maybe some of these components are important, and we can't possibly know without a deeper background on it.

The graded series of capacitors are almost certainly inappropriate, as is the case in general, but likely don't do anything here.

A coaxial connector, driven at 24V, seems like something that would be either an embarrassingly weak load for a 10A transistor (even the '3055 in the schematic), or an inappropriate choice of connector giving an inductive load (for Z < Zo and F ≪ λ/4, a transmission line looks like a series inductor) and thus the lack of ground-to-output catch diode is problematic.  But that's only a suspicion without further information on what this thing is actually doing.

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
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Offline Someone

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Re: UCC5304DWVR to mosfet over populated with not neede components help
« Reply #2 on: July 01, 2024, 11:42:11 pm »
Maybe some of these components are important, and we can't possibly know without a deeper background on it.
The cloud of topics around this poster has been "interesting" in the apparently wild approaches to non-specific-something-or-other application.

Time to step off:
https://www.eevblog.com/forum/projects/digital-buffer-delay-components-reply-thread-starteryef-smith-start-date2-minu/
 


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