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  1. ron simpson

    Switching w/ Digital Power Supply

    I do not understand what you want. Power supplies can be built "in software". The error amplifier can be made in software. You measure the voltage. Compare to what it should be. Add delays, and phase shift/ frequency response then increase or decrease the duty cycle. Many of the...
  2. ron simpson

    Quicker OFF-ON Time?

    MOSFET are faster then there are SiC mosfets that are faster yet and now GAN fets that are really fast. What voltage and current do you want to switch?
  3. ron simpson

    Conducted Emissions Related Failure in BOOST Circuit

    What filters? My guess, there are no filters.
  4. ron simpson

    Amps of a car battery

    Very hard to know. What metal, what finish, covered with oil? How long is the wrench? I think a wrench is a poor conductor in that it was never designed for this. But it is good enough to conduct 100s or 1000s of amps.
  5. ron simpson

    Designing A Buck Circuit

    One problem is the 48 in ->48 out. At about 49V in, the Buck has stopped working and is just passing on the current. Many ICs give up unless there is 5V more on Vin. There are Buck/Boost that can do that and more. 40Vin and 48Vout no problem. A simple one IC design has a problem that most...
  6. ron simpson

    Measuring Clamping Voltage of a Varistor

    It is on the data sheet. But it is not easy to understand. A 100 volt part does not just turn on at 100 volts. It pulls some current at 100V and more at 110V and much more at 120V and lots of current at 130V. What is the part nuber?
  7. ron simpson

    Using Synchronous Rectifier in Boost Converter

    Synchronous diodes are good where the output voltage is low and the current is high. If you are bucking to make 1.8V and the diode has a loss of 0.7V a synchronous diode really helps. example; You need to make 2.5V and loose 0.7V to get 1.8V so about 1/3 of the power is lost in a diode. A...
  8. ron simpson

    Switching Regulator Components

    That covers many types of power supplies. Are you looking at power line to 12 volts? or DC-DC like 12V to 5V? or solar? How much power? If you are just wanting to learn switchers, we should start out with a simple DC-DC that is save.
  9. ron simpson

    Coupling on Primary and Secondary Windings

    Put voltage on the primary of a transformer and a voltage appears on the secondary X turn ratio. Current from a secondary must come from the primary. (turn ration) Put a load on the secondary and the load appears on the primary. (turn ration involved) A transformer is much like a electric...
  10. ron simpson

    Switching w/ Digital Power Supply

    Please explain what you want to do. More words and pictures.
  11. ron simpson

    AC Voltage Meter - Non Transformer Solution

    Do you want to measure AC (measure each part of the waveform) or will Average or RMS work? I am trying to find out if you are measuring every couple of seconds and Voltage x Current. Or are you measuring V x I (100 times 60hz).
  12. ron simpson

    Op amp capacitance

    What part are you using? I want to see the data sheet. Some times I add a 1 to 10 ohm resistor to the output of the amp to separate it from a capacitor load.
  13. ron simpson

    Power Dissipation in Switching Regulator

    There are many things that cause power loss. When current passes through a diode, one form of loss is the Voltage Forward of the diode X Current in the diode. (0.65V X 2A) When current passes through a MOSFET, one type of loss is "Resistance Drain-Source on" & the current D-S causes loss...
  14. ron simpson

    Conducted Emissions Related Failure in BOOST Circuit

    yes
  15. ron simpson

    MIP0223SY Switching

    Good. The TOP series are complex parts that make cleaver power supplies. There are many versions made by this company. Their data is hard to find. They have examples of how to use the parts, and PCB examples. If you have questions I have used these parts.
  16. ron simpson

    Using LTSpice for Power Supply

    I don't quite understand what you want but: I used a sine wave 60 hz 14Vpk=10Vrms. Four diodes to get to DC and a capacitor to filter. 1000 resistor to limit the current to 10mA.
  17. ron simpson

    High Current Driver

    I don't know if DoGer86 needs isolation or not. I asked because working right on the power line can be exciting. I am using isolation because the computer (PWM) is sitting on ground and the FETs are on the power line.
  18. ron simpson

    MIP0223SY Switching

    Not a MOSFET! It is very complicated. It can not be just turned on. It has a maximum amount of time it will stay on. It wants to turn on and off at 100khz. Not a MOSFET!
  19. ron simpson

    Parallel Charging - In need of guidance

    I think two or more current sources will work. The makers of the electronics will say not to do this, because they have not tested this. "void warranty" Probably your idea is a little dangerous mostly because it is not commonly done. A battery charger will reduce charging current when the...
  20. ron simpson

    High Current Driver

    FAN7392 Data sheet on one option. This is not isolated so the controller (PWM) needs to be sitting on the Source of the bottom FET. Do you need isolation?
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