Rosemary:

I wonder what "booster converter" mode is.  It sounds real cool though.

QuoteJust a small note here to Poynty Point.  I don't think you've allowed for impedance.  But well done for getting this argument back and closer to the 'real truth' - as MileHigh puts it.  And since TK - as ever - is parading his monumental lack of abilities related to power analysis or alternatively he's parading his monumental efforts at misdirection - may I remind you ALL.

That is more low-life ghetto garbage behaviour from you and you should be ashamed of yourself.

So are you going to get out of the gutter or not?  Do you have any self-respect?

MileHigh

@.99:

0.179 x 73 = 13.07 x 4 = 52.3 Watts average according to the numbers in boxes, for the full 100 percent period.

(1.25 x 73) x 0.45 = 41.1 x 4 = 164.25 Watts POSITIVE during the Hi time. or .45 of the period. This comes right off the scope traces. I put a blowup graphic up. Are my figures wrong?

So to bring this figure DOWN to the 52.3 watts average you cite, what then would be the current and power required in the oscillations?

And how do you account for the difference between the "cycle mean" and the "mean"? Cursors, foiled again?

TA: I see you've already addressed that. Do you know that the LeCroy also doesn't know to take the mean across a full number of cycles? It displays the mean of what's on the screen.

Quote from: Rosemary Ainslie on May 16, 2012, 08:49:47 PM
Not actually Poynty Point.  NOT according to the specifications and NOT according to LECROY. 

Rosie pose

Rosemary,

The LeCroy manual is open to interpretation. The scope looks for zero-crossings or peaks, and if it looks within the oscillation, it will not provide an accurate number for one full HI/LO cycle.

Also, if you sent that wave form to LeCroy and asked them if it was possible to obtain an accurate "CYCLE MEAN" for it, I am quite confident they would reply with a "no, use "MEAN" in this case".

Quote from: MileHigh on May 16, 2012, 08:52:38 PM
Rosemary:

I wonder what "booster converter" mode is.  It sounds real cool though.

That is more low-life ghetto garbage behaviour from you and you should be ashamed of yourself.

So are you going to get out of the gutter or not?  Do you have any self-respect?

MileHigh

THIS IS MORE EVIDENCE OF SLANDER.

Quote from: poynt99 on May 16, 2012, 08:55:34 PM
Rosemary,

The LeCroy manual is open to interpretation. The scope looks for zero-crossings, and if it looks within the oscillation, it will not provide an accurate number for one full HI/LO cycle.

Also, if you sent that wave form to LeCroy and asked them if it was possible to obtain an accurate "CYCLE MEAN" for it, I am quite confident they would reply with a "no, use "MEAN" in this case".

Poynty Point - THERE IS ONLY ONE NUMBER THAT LECROY WILL GUARANTEE - and that is the voltages over a broad range of samples.  There are NOT EVEN ENOUGH SAMPLES in that screenshot to give an ENTIRELY dependable analysis.  We ONLY recorded that screenshot sample to give a CLEAR indication of the extreme transients evident over the current sensing resistor. 

And NOTA BENE - TK's UTTERLY incorrect reference of the switching period.  THAT in itself is GROSS MISREPRESENTATION.

Again
Rosie POSE.

I must admit I assumed you were inclined to a more less BIASED approach.  Clearly assumptions are always DANGEROUS.