T
treez
Guest
With the FL6300 flyback smps control chip, the optocoupler is connected to the FB pin, and the FB pin is said to have an input impedance of 5Kohms.
Does this mean that the opto transistor must be set up so that it can draw at least 1 milliamp out of the FB pin?.....because otherwise, if it could not draw at least this current, then the optocoupler would not be able to reduce the power throughput of the flyback sufficiently in times of light loading?
FL6300 DATASHEET
https://www.fairchildsemi.com/datasheets/FL/FL6300A.pdf
Does this mean that the opto transistor must be set up so that it can draw at least 1 milliamp out of the FB pin?.....because otherwise, if it could not draw at least this current, then the optocoupler would not be able to reduce the power throughput of the flyback sufficiently in times of light loading?
FL6300 DATASHEET
https://www.fairchildsemi.com/datasheets/FL/FL6300A.pdf