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  1. Replies
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    Closed: Re: 1.5kw DC to DC Boost Converter Circuit

    No. I'm only talking about a way to analyze the operation mode. As said, there's no simple solution, except for reducing the controller gain.
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    Closed: Re: 1.5kw DC to DC Boost Converter Circuit

    Thanks, I didn't realize that it's a 3525 hardware pwm controller. I guess, instability occurs when the output current transits to discontinuous mode (DCM). Power stage gain is constant in CM but...
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    Closed: Re: 1.5kw DC to DC Boost Converter Circuit

    It looks like the gate control is paused intentionally by the controller circuit. If so, it's a software rather than power electronics problem. Any voltage regulation implemented?

    To ask the other...
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    Closed: Re: AC-DC power supply design

    According to IEC 61000-3-2 Limits for harmonic current emissions (equipment input current ≤16 A per phase), professional equipment (defined as: equipment for use in trades, professions, or industries...
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    Closed: Re: ZYNQ Power Requirement

    Seriously, before starting a PCB design, you should have at least a shallow knowledge of ZYNC document structure.

    Designing IO bank supply requires to choose IO standards before, e.g. do you have...
  6. Closed: Re: Voltage input to BLDC inverters on tethered drone?

    How did you advance from 1.2 kW to 12.5 kW drone power supply? I presume there are very few civil applications for this technology.
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    Closed: Re: NIMH Button cell 8.4volt 40mA

    Just for clarification, you are talking about 40 mAh NiMH button cells? If so, trickle charge current of 1.1 mA seems appropriate. Standby current is however hardly 40 mA, do you mean 40 µA?

    The...
  8. Closed: Re: how to find processing time of an algoritm in Vivado 2017?

    The processing time is fixed by algorithm design and doesn't depend on Vivado software.

    Are you talking about a pipelined design that reads one data point per clock cycle or a sequential...
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    Closed: Re: 230VAC PWM LED bulb dimmer

    If it's dimmable LED, what's the specification? Typically they use trailing edge phase control.
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    Closed: Re: 230VAC PWM LED bulb dimmer

    You can alternatively drive the 555 charge/discharge resistors by OUT pin, leaving DIS pin unconnected.

    Some flickering can be expected due to 500 Hz pwm running asynchronous to 50 Hz mains.
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    Closed: Re: 230VAC PWM LED bulb dimmer

    It doesn't actually matter in this case, but your gate drive power calculation is completely wrong. Neither gate Iavg nor Irms is significant, instead you'll put in Qg*Vgs as energy consumed per...
  12. Closed: Re: Freq computation without DIV instruction for 8bit MCU

    If you perform only 1 measurement per second, 40 µs division time (0.004 %) would be absolutely no issue. But I guess 1 Hz is too slow. For reasonable measurement rate and resolution, you are tied to...
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    Closed: Re: Best isolated or differential scopes/probes

    I haven't yet found a differential probe that is suitable for measuring high side gate voltage without huge common mode crosstalk. I didn't yet check the PMK "BumbleBee" 400 MHz probe, but from CMRR...
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    Closed: Re: Best isolated or differential scopes/probes

    For the said measurement application (high side gate voltage), you need really high CMRR and a probe design that doesn't send common mode currents down the probe cable.

    The Tek optically isolated...
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    Closed: Re: Addressable speaker system

    I agree about using RS-422 or RS-485. It can work over many km in a party line topology with correct end termination.

    I'm however surprised that you are planning 200 m regular speaker cable,...
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    Closed: Re: Step Cieling fan regulator using Triac

    What's the opto triac type?

    I suggest an RCR filter/snubber circuit like below to prevent parasitic triggering. R2 can be reduced to 50 to 200 ohm to make the circuit work as a snubber for the...
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    Closed: Re: Step Cieling fan regulator using Triac

    Suggest you get self-triggering of opto triac or main triac by high dv/dt. That's likely to happen with inductive load, RC filters for the opto triacs are suggested. Refer to application circuits for...
  18. Closed: Re: Configuring ICE40 FPGA directly from ESP32 uC rather than using dedicated flash I

    "Slave SPI mode" in the configuration manual refers to operating the uC as SPI master and ICE40 as slave which is most likely the easier way.
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    Closed: Re: Seeking wiring advice for Wifi router

    You are apparently misunderstanding things. The WiFi adapters have two antenna ports for diversity purposes, each coax cable will be connected to a reverse SMA jack and an antenna. If you have only...
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    Closed: Re: Oscillations dying out

    1. You can verify by checking the loop gain.
    2. Choose initial conditions that result in a start magnitude below steady state. You'll see a rising magnitude at the start.
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    Closed: Re: L1 and C1 value for EMI filter design ?

    As explained by cariban, C1 and L1 aren't directly related, respectively there's no formula linking the values.

    For L1, I would use a low current common mode choke like this...
  22. Closed: Re: Remove glitches in output frequency of ring oscillator

    What we see in post #1 is not jitter. It's an unstable oscillation mode.

    Apart from the question it's a real hardware effect or a simulation artefact, what's the purpose of increasing the number...
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    Closed: Re: L1 and C1 value for EMI filter design ?

    Why 4.7 uF, why not 47 nF or 470 nF? You didn't yet specify any application parameters.
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    [SOLVED]Closed: Re: LoopGain analysis with multiple feedback loop

    Sure, due to series-shunt feedback working.
  25. Closed: Re: LLC converter vs Dual cascaded Buck….1000V to 48V at 500W output…no isolation ne

    The current spikes are caused by D3 snap-off. The diode is completely useless.
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