(pg2 for me)
I'm sorry I didn't remember the first part of this thread. Would have saved me a bunch of time..and would have made you my first "go to" guy.
100-1Khz.. for LDD's so it is within their range.
Not sure this controller will work at 5V. The PWM seems to idol at 5.. so where is it going to go?
Care to scope it at that voltage?
don't like the voltage overshoot much either..I suppose some type of capacitance/inductance effect..
I assume that is "ringing"?
http://www.ti.com/lit/an/slyt465/slyt465.pdf
As MOSFET switching speeds continue to increase, controlling
the switch-node ringing of a synchronous buck
converter is critical. Doing so requires a good layout and
proper analog-circuit design with a boot resistor, a highside
gate resistor, or a snubber.
OK ,here is the 2 questions:
1) How to get it to output just 5V pulses, considering the apparent limitations of the pulse idling at 5v.
Run it at a higher voltage and then drop it at the output?
2) how to increase the power handling?
Some of the larger Beamswork's exceed 4A out on a single channel.
Using what we did (cascade ) and larger spec MOSFETS seems to be one answer..
Second answer would be to replace the ones inside w/ larger capacity.. BUT may require heatsinks..
BTW I can't read the numbers on the internal MOSFETS on the output. Out of curiosity do you know what they are?
Sorry for having so many questions but so few answers..
Oh when we ran the controller on 9V the output metered oddly on the VOM. I was expecting the usual averaging i.e at 50% it would average around 4.5V. The meter didn't do this..
At first I thought it was just doing "max" but now that I see the trace is it possible the 5v "idle" voltage was responsible?
9.57 volts from 400ma transformer
Yes. Interesting, 100% = 9.57, 50%=9.40, 25%=9.3
after all this we can get to the WIFI part..