Richard VIALLE's new theory about negative mass and overunity

[itsu]

Hi Verpies or Itsu,
  the gate-driver has arrived. It should be fun soldering it's tiny-little pins...

The guy in the vid Itsu linked made it look easy, but I think he's had practise...

I think that the example diagram top-right page 2 of the datasheet, (for non-inverting input) is probably the one I should use...
http://www.ti.com/lit/ds/symlink/ucc27512.pdf

I could use some help in choosing a value for the resistor R3 please... I don't really understand what it's there for TBH...

Also, can you tell me what the function of the capacitor C2 is (between Vin and Gnd)? Also, how do I choose a value for it?

Apologies for my ignorance... I'm still very much a novice...

Regards, Tim

PS: While doing the washing-up, I decided that the cap is almost certainly just a smoothing cap... And the resistor is probably for limiting current... Hmmm.

Right, C2 is a decoupling ceramic capacitor of about 0.1uF as close as possible (ontop) to Vdd and ground.
R1 and R2 (if you did order the ucc27511 as i had and which was suggested by verpies you need R1 and R2, so the top left diagram) are indeed
for current limiting, in this case (if R1 and R2) seperate for sink and source current, but you need verpies to have it explained better allthough the
data sheet does mention what they are for.

You need some magnifier and some flux and a desolder wick to successfully solder those tiny chips 

Good luck,  regards Itsu

[verpies]

I think that the example diagram top-right page 2 of the datasheet, (for non-inverting input) is probably the one I should use...
http://www.ti.com/lit/ds/symlink/ucc27512.pdf
I could use some help in choosing a value for the resistor R3 please... I don't really understand what it's there for TBH...

If you have the UCC27511 then you need to choose the values of R1 and R2.
R1 determines how quickly the MOSFET turns on and R2 determines how quickly the MOSFET turns off. 
In other words, R1 affects the rise-time and the R2 affects the fall-time of the gate voltage and drain current.
This is because the Gate of the MOSFET is like a capacitor, thus the smaller the resistance of these resistors, the faster this gate capacitance gets charged/discharged.
You can start with a 47Ω carbon resistors, and go down from there if you need faster rise/fall times.

If you have the UCC27512 then you need to choose only the value of R3.
R3 determines how quickly the MOSFET turns on and off. (the rise time and the fall time of the gate voltage and drain current.)
You can also start with a 47Ω carbon resistor, and go down from there if you need faster rise/fall times.

Also, can you tell me what the function of the capacitor C2 is (between Vin and Gnd)? Also, how do I choose a value for it?

It's a power supply smoothing cap and a filter that prevents the pollution of power supply lines.
It is there to keep the supply voltage to the UCC2751x steady.  This little driver draws so much current when it charges the gate capacitance of the MOSFET that the power supply lines to it can sag or become noisy.  A ferrite bead or a choke in series with the supply line is also recommended to filter out the spikes caused by this driver for other devices on the same power supply.

P.S.
In both cases I recommend connecting VDD pins of the UCC2751x drivers to a +15VDC power supply line through chokes in series (or ferrite beads) and ceramic capacitors in parallel to the GND pins ( with as short leads as possible, a.k.a. piggybacking ).

In the datasheet, L1, D1, C1 constitute an example load and do not have to duplicated.  For testing purposes another load can be used (e.g. purely resistive).  Also remember that V_SOURCE for the MOSFET can be much greater than V+ or V_DD for the driver.

[verpies]

Below are some sample applications of the UCC27511 drivers for a totem-pole digital power amplifier driving a large transformer.
Warning: These circuits are not current limited thus they will blow up in the absence of the square input waveform.

[tim123]

Hi Guys,
  thank you for your replies. I did buy the ucc27511. Two of them actually, just in case...

I hadn't realised it worked like that - i.e. with the source for the gate on 1 pin, and the sink on another... That's really cool.


Tim

[tagor]

R Vialle revue et corrigé by anonymous

from this video

https://www.youtube.com/watch?v=fdlZ03-8MaA

R Vialle == Meyer/Mace


http://www.overunity.com/4333/meyer-mace-isotopic-nmr-generator/#.Uv-UFKyweFA