Off-line flyback regulator

  
This circuit uses a low-cost feedback scheme in which the dc voltage developed from the primary-side control winding is sensed by the UC1842 error amplifier. Load regulation is therefore dependent on the jcoupling between secondary and control windings, and on transformer leakage inductance.
Off-line flyback regulator  - schematic

For applications requiring better load regulation, a UC1901 Isolated Feedback Generator can be used to directly sense the output voltage.




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