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Recent content by prentemp

  1. P

    generate sawtooth with uc3637

    it is so odd.+Vth can connect +Vs,it has a normal sawtooth.but -Vth cannot connect -Vs,the output is high level. why?
  2. P

    lossless snubber of forward converter

    forward snubber if you work in high frenquency,you can make the oscillation bigger than mosfet on time,but the snubber inductor need a resistor snubber. i think
  3. P

    generate sawtooth with uc3637

    uc3637 now,i need a sawtooth which +Vth equal to +Vs and -Vth equal to gnd. i direct connect +Vth and +Vs ,-Vth and gnd.it is ok? or need a resistor to limit the current to protect uc3637? thanks!
  4. P

    How can delete current spike in Flyback?

    there is spike both in the switch on and off,and it is very high in off.
  5. P

    How can delete current spike in Flyback?

    the frequency of Flyback is 200kHz,i am afraid of common sign also filtered.
  6. P

    How can delete current spike in Flyback?

    now i detect the current in transformer primary.it has a big spike.how can delete it? thanks!
  7. P

    powder cores for flyback transformer

    i need chose powder cores for flyback transformer.But i have not any data about the powder cores. now i want web address about it,can you help me?thanks! :oops:
  8. P

    want message of isolated boost?

    i need collect message about isolated boost,but what i can get is very lack.i want more,please! :?
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