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  1. marginal

    Opto-Coupler pole in SMPS feedback

    Hello, On page 12, 13 and 14 of AN1059 application note they do the feedback compensation for the L6561 flyback power factor corrector circuit. ****AN1059 Flyback PFC application note. http://www.st.com/stonline/products/literature/an/5956.pdf However, considering the equation at the bottom...
  2. marginal

    Slope compensation for current mode SMPS

    hello, I am doing a current mode buck converter using a UC3842 PWM controller and a low side mosfet. Input voltage is 160V. Output voltage is to be 110V. The load is a long series string of 150mA LEDs. The duty cycle will end up being 110/160 = 0.69. -However, this duty cycle is greater...
  3. marginal

    Current mode or Voltage mode SMPS?

    Hello, The following article states that current mode control is best, period:- (see first paragraph, left of man's picture) http://www.powersystemsdesign.com/design_tips_june07.pdf ..................... The following article states that sometimes current mode is best, and sometimes voltage...
  4. marginal

    SMPS controller compensation

    Hello, regrading SMPS, the Peakswitch family of SMPS controllers require no compensation components and use simple ON/OFF control. They have excellent regulation and transient response..... http://www.powerint.com/sites/default/files/product-docs/pks_family_datasheet.pdf .....what i can't...
  5. marginal

    Common moide choke current rating

    I am writing regarding the common mode choke in smps EMC filter at mains input. I need a common mode choke of 14.4mH and 2A. However , i cannot find one which has this high current for this inductance. (at least not one which is of a reasonable size) This datasheet is typical...
  6. marginal

    SMPS control loop compensation

    Hello, Apologise if this is more investigative though i feel sure it will be of interest to many. Recently i attended a seminar in Reading , UK from Linear Technlogy about their circuit simulator which is used in SMPS design. ~90 SMPS engineers were in attendance. At one point, the speaker...

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