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Make a simple volt reg to 36V ( or 33 if you prefer ) and run this via a resistor to the Cathode of the 431, use dividers to the Ref pin of the 431, the other pin goes to gnd
now the 431 will survive and the cathode will pull down when the divider string forces more than 2.495V on the...
Most experienced power electronics engineers who have made product to pass standards know all about the " issues " you raise - and many others - they know how to design for " quietness " in the first place - to answer your question - you would talk to such an experienced person -...
Really the Rgate value(s) are application specific - to fast a turn off with inductive load can volt spike the fet and kill it
too fast turn on can do the same thing to diodes in the circuit ( sec side of transformer for example ) and cause high di/dt and RFI into control
there is no...
if you wire a CM choke as series aiding ( instead of series cancelling - i.e. normal mode ) then you will get 4 x the L of a single wdg, as L prop to N^2.
unless you can average readings to remove the noise - and calc the phase lag between the two signals ( and the magnitude difference for gain ) you may as well give up - noise is the biggest bugbear when trying to do loop gains - hence things are normally run at the highest...
what you can do is use a sig gen ( isolated if necessary ) to inject a sine wave perturbation into the control loop - i.e. into just after the volt ref or demand spot - insert resistor ( say 100 ohm ) if necessary, to isolate the Vref from the sig gen - and then look at the output of...
what you can do is use a sig gen ( isolated if necessary ) to inject a sine wave perturbation into the control loop - i.e. the just after the volt ref or demand spot - insert resistor ( say 100 ohm ) if necessary to isolate the Vref - and then look at the output of the converter on...
Yes - verify the Fsw, I simply read it from the graphs in the data sheet with the given R in the sch ! - and also that the inductor is not saturating ( build a square 4 of the L's and solder in temporarily on wires, this gives the same L, but twice the current capability )
I note...
Dick has the good suggestions to follow first.
also the wires to the board - dropping volts ?
1742251414
OK - it's pretty easy to see the issue here - the freq is set for 267kHz, the curr limit is set for ~ 8A
say we are boosting from 3V to 5V, the steady state D will be ~ 0.4...
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