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Recent content by scopeprobe

  1. S

    how to calculate AC power by cadence?

    If the waveforms arn't Sinusoidal then Power Factor is only 50% of the problem, you are then in the realms of 'Total Harmonic Distortion' which to measure usually requires a FFT of the waveform. A truely Sinusoid current has low THD AND is in phase with the votage. In the time domain simulator...
  2. S

    Altium aluminium base pcb layer stackup

    I usually specify the PCB layer stack as you would a typical FR4 but then in accompanying documentation (detailed drawings) specify in the notes the the PCB as Xmm Aluminium Clad along with any other details.
  3. S

    Low duty cycle Buck?

    Could always use a switching transformer to step down if a buck isn't meeting your requirement.
  4. S

    Why so few Surface mount formers for EFD cores and E cores

    Try Norwe for SMT Bobbins https://www.norwe.eu/products/de/007#D01 or for your spec have a look at this https://www.we-online.com/components/products/datasheet/750811643.pdf it has 2 500mA 24V secondaries which could be paralleled to give you 1A
  5. S

    Need help with SMPS output voltage higher than spec

    The black connection of the DVM doesn't appear to across the output but instead look to be measuring with respect to chassis. The output needs to be measured with respect to TGND
  6. S

    Adding output current clamp to Buck?

    I'd question whether the LT1006 Output voltage with a series diode would be low enough to limit the current as the Max voltage on Ith is only 2V. I've not evaluated the circuit in great detail but it maybe easier to feed a current into R2 when trying to limit the current such that the IC...
  7. S

    Please Suggest C++ Books

    C++ from the Ground Up, Third Edition by Herbert Schildt is pretty good
  8. S

    Buck converter design help needed

    I recall they are targeting a 3A output (5V * 3A = 15W) so the current ripple they have calculated for would probably have being 40% of that, I rated my circuit for the 5V 2W (0.4A) which met your requirement. The lower current ripple as a percentage of the lower defined current load gives a...
  9. S

    Buck converter design help needed

    The MP2315S looks to have a maximum input of 24VDC so if your looking at operating at 24VDC i'd suggest a device with some headroom, maybe the MP2338 https://www.monolithicpower.com/en/products/mp2338.html. To step down at this current an inductor such as...
  10. S

    VOUT overshoot reduction in SMPS?

    How do you know your opto is the source of the overshoot? You have a pretty complex feedback network going on which could well be a major contributer to overshoot due to its PID nature. How do you know the control loop topology is the correct one and the values are correct?
  11. S

    VOUT overshoot reduction in SMPS?

    But if the Opto Bandwith is the problem what use a a fast amplifier? I see your error amplifier is configured more like a PID controller, is that necessary? How have you tuned your control loop? Just wondering if your overshoot is in part due to the PID
  12. S

    VOUT overshoot reduction in SMPS?

    Not sure how this would help if your using the same optocoupler.
  13. S

    What could these components be?

    A looks like a Bridge Rectifiier
  14. S

    [SOLVED] Simple Shift Register

    Yes i didn't want the latch storage capability of the 595, i just wanted just a simple shift register that i cold clock some bits for a very simple timer. 1672755735 Its just standalond driven by a clock. The 74HC164 met the requirement thanks

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