Can you replace bad ob2269(SMPS not clicking any longer and chip has about few V on pin 3 VIN although in front of it there is 310V) with sg6841 or ld7552 or some other without modifying circuit around it(except for the sw. frequency setting resistor) as the one at
What should one check Zfb,Zcs first, or missing leading edge blanking block and one diode after fb input?
(real ob2269 circuit has different component values and in addition resistor divider at MOS gate and one more diode+capacitor in front of VDD)
What should one check Zfb,Zcs first, or missing leading edge blanking block and one diode after fb input?
(real ob2269 circuit has different component values and in addition resistor divider at MOS gate and one more diode+capacitor in front of VDD)
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