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  1. Is it ok to increase the switching frequency...

    Is it ok to increase the switching frequency considering the skin effect of the conductors ?
  2. Forgot to tell you that I am using high...

    Forgot to tell you that I am using high permeability core here (ui=5000 for R5K). So should I stick to the flux density under 2000 Gauss ?
  3. Next week I will be off to my hometown. After...

    Next week I will be off to my hometown. After returning, I will rewind the transformer in 3 layer and post the results here.
  4. I see you have increased the switching frequency...

    I see you have increased the switching frequency very high ! Would not it increase the conduction loss of the MOSFET ? In the site www.bcae1.com, the author mentioned that car audio booster normally...
  5. Wally7856, I really appreciate your help in this...

    Wally7856, I really appreciate your help in this regard.

    I will love to design an optimum transformer with your help. Presently I am following http://www.bcae1.com/trnsfrmr.htm for designing it....
  6. I tried that Maxim note also. But didnt get...

    I tried that Maxim note also. But didnt get satisfactory result than with 10R and 15nF cap.

    Attached is the modified gate drive circuit.
    During positive half cycle gate will get the pulse via...
  7. I used a gate drive resistor of 22R and added...

    I used a gate drive resistor of 22R and added 1n4148 diode across the gate drive resistor so that turn on is slow and turn off is fast. Now performance is improved and the wavehspae is clean till...
  8. I have rewinded the trasnformer with evenly...

    I have rewinded the trasnformer with evenly distributed winding. It seems performance is much better now as the spike is appearing just after 14.3V,

    Previously at 14.3V the standby current was...
  9. I dont want to use output inductor for this...

    I dont want to use output inductor for this application as this is unregulated supply. I have seen an existing amplifier bought from market which is working without any spike using just a capacitor...
  10. Thanks Wally7856 for your help. I really...

    Thanks Wally7856 for your help. I really appreciate your seriousness on this ! :)

    Here is the details of the transformer:

    Core material: R5K
    Turn Ratio: 4:4:12
    Toroid Inner Diameter: 19.5mm...
  11. Looking for good quality toroid transformer manufacturer in China

    I am looking for a good quality transformer manufacturer in China. I need to manufacture dc-dc boost toroid (12V to 40V push pull) transformer for commercial use. My present manufacturer didn't...
  12. Thanks. I will try to do so. :)

    Thanks. I will try to do so. :)
  13. All are inside test waveform.zip

    All are inside test waveform.zip
  14. Inductive Spike for Push-Pull car audio supply

    I am facing this problem, which is causing the two push-pull MOSFET to extreme stresses.

    I am using this to power TAS5630 amp. the boost converter is converting the 12V DC voltage to 36V DC...
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    Identyfying ferrite core material

    I have desoldered the transformer from a car amp(TAS5630) board. It is used here in the push-pull stage to step up the voltage from 12V battery. Now I need to know which core material is used here. ...
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    SG3525 ferrite transformer calculation

    I am designing a 300W car amplifier using TAS5630B. To power the chip I am stepping up the 12V input to 40V DC using push-pull topology. My controller chip is SG3525 and I am using a PC40 material...
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    Ferrite core marking !

    I would like to know what "EE1621" means. I guess the 2 cores are E shaped, 16 is the outer dimension (not sure), 21 is for "what" ?5015


    This is extracted page from a PI reference design-
    ...
  18. Need reference design of a 5V 80W to 100W DC SMPS

    Can anybody give me a reference design of a flyback 5V 18A or more DC supply with 115V AC input ?

    Normally chip manufacturer put reference design in their site, but the maximum I got is DER-245...
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    already posted ... chk the first page

    already posted ... chk the first page
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