# Search results

1. ### How to design a Passive low pass filter of L and C values

How to design passive low pass LC filter ? Please can you help me how to design a Passive low pass filter of L and C values calculation ? Equations ?
2. ### Underdamping problem in the electrical system?

Re: Underdamping problem in electrical system ? The components will get over heat due to under damping ?
3. ### Underdamping problem in the electrical system?

Re: Underdamping problem in electrical system ? Hello KlausST, I want to waste the energy in the AC circuit. So, If I add a LC low pass filter before the component. May I overcome a underdamping problem in the AC circuit ? Otherwise, Can I add a LC filter before the component and adding a...
4. ### Underdamping problem in the electrical system?

Re: Underdamping problem in electrical system ? Hello CataM, We can add inductor instead of resistor.
5. ### Underdamping problem in the electrical system?

Underdamping problem in electrical system ? In the electrical circuits, why and how the under damping problem occurs in the electrical waveforms ? What is the reason behind to have a under damping issue in the electrical waveforms ? How to overcome this problem ?
6. ### Cadence Allegro PCB Design Tool

Hello All, I want to learn Cadence Allegro PCB Design Tool fully. So, I want to a user manual / book to learn scratch to end. Please can you suggest me where can I found. I search in the google but there are lot of materials. So which Material I suppose to follow I am not understanding.
7. ### what is Prepreg and Core ?

Hello Everyone, I would like to know each and every question which I have mentioned below, Prepreg: 1) What is Prepreg ? 2) Why it is using in the multi layer boards ? 3) What is the purpose to use ? 4) In which layer we suppose to use in the multi layer boards ? Core: 1) What is Core ...
8. ### How to make the good PCB for High Frequency (MHz) power converters?

Hello, I am working on DC-DC power converters with High Switching Frequencies (3MHz), In the circuit, 60V input voltage and the current running in the circuit around like 1.5A, I am using center-tapped transformer (4:1). So, Please can you suggest me that, How many layers have to be used in...
9. ### Problem with Vds voltage at MOSFET

Thank you Sunny, But, I have another question... If, I would like to work with the same MOSFET in the converter. What I have to change in the circuit and which values I have to tune. Because the MOSFET specification is matches to my work specification and also other hand the Vds voltage and...
10. ### Problem with Vds voltage at MOSFET

I am working class-E DC-DC converter topology. I have the problem with the drain-source voltage which is not immediately start to rise the Vds voltage after the gate voltage zero. So, what are the values need to tune in order to get the ZVS (zero voltage switching). I can get it at another...
11. ### how to Define the transformer Primary & Secondary windings in SIMetrix ?

how to Define the transformer Primary & Secondary tuns in SIMetrix ? Hello, I am using the center-tapped transformer in SIMetrix simulation tool. The exciting tuns ratio of the transformer are 8:2. The primary tuns I have set to 8 turns according to the ratio. Now, what value I have to give...
12. ### How to improve the efficiency of the Class-E DC-DC converter circuit

Please, can you provide me the formula's for both of them For MOSFET Switching losses: How to calculate the MOSFET Switching Losses, If they are not given the Ton and Toff time in the datasheet? Is they any another formula? Pswi = Vds x Id x Fsw x ((Ton x Toff)/2) For Diode Switching...
13. ### How to calculate the Switching losses for MOSFET and Diode?

I had seen the link which you provided. But, I have one doubt, the formula Voff is need to be consider as a peak voltage or Vrms voltage.
14. ### How to calculate Mosfet Switching loss and conduction loss?

Re: MOSFET Switching Losses Here, Voff is consider as a peak voltage or Vrms?
15. ### How to calculate the Switching losses for MOSFET and Diode?

Hello, For MOSFET Switching losses: How to calculate the MOSFET Switching Losses, If they are not given the Ton and Toff time in the datasheet? Is they any another formula? Pswi = Vds x Id x Fsw x ((Ton x Toff)/2) For Diode Switching losses: How to calculate the Diode Switching Losses...
16. ### How to improve the efficiency of the Class-E DC-DC converter circuit

Hello mtwieg, I have used the 4F1 core of the transformer. Now, I have changed to 3Mhz switching frequency of my circuit. I have tuned the components in the circuit in order to get the soft switching (ZVS). But, still the efficiency is 76% only. Here, I have used the two different types of the...
17. ### How to improve the efficiency of the Class-E DC-DC converter circuit

As far now, The results of the circuit is Vout = 16.225, Iout = 1.154 and Vin = 60, Iin = 0.441. So, the efficiency is 70% If I decrease the input current to 0.350m with out changes in the output voltage and current, then the efficiency is more high. So, how you can do this in the circuit ? If...
18. ### How to improve the efficiency of the Class-E DC-DC converter circuit

Have you used Ideal or practical transformer in order to simulate the circuit? If you used Practical one which core you selected ? Which simulation tool have been used ? In my case, I have used the 4F1 ferrite core material of the transformer. Below I have attached the core details...**broken...
19. ### How to improve the efficiency of the Class-E DC-DC converter circuit

Hello mtwieg, I have changed the frequency within 10%, but there is no that much changes in the efficiency. Just the efficiency is increased from 41% to 47% at the 5.1Mhz. So, now I am planning to concentrate on core and copper looses at the transformer. Do you think is it make sense...
20. ### How to improve the efficiency of the Class-E DC-DC converter circuit

Hello mtwieg, Magnetizing inductance means primary inductance of the transformer. If I understand correctly, the value of magnetizing inductance is 6.2uH. If I use the EPC2025 also the pack of Vds value is 400V with out placing the shunt capacitor parallel to the MOSFET. If I placed the shunt...