T
treez
Guest
Hello,
Can you confirm the purpose of the two series diodes in the FB pin of the FAN6300A Flyback controller? Is it just to ensure that optocouplers which cannot pull the FB pin fully down to 0V still manage to stop the controller from PWM’ing the power FET.
The diodes are seen on the block diagram of page 3 of the FAN6300A datasheet….
https://www.fairchildsemi.com/datasheets/FA/FAN6300A.pdf
Can you confirm the purpose of the two series diodes in the FB pin of the FAN6300A Flyback controller? Is it just to ensure that optocouplers which cannot pull the FB pin fully down to 0V still manage to stop the controller from PWM’ing the power FET.
The diodes are seen on the block diagram of page 3 of the FAN6300A datasheet….
https://www.fairchildsemi.com/datasheets/FA/FAN6300A.pdf