SNVSBJ3A April 2020 – September 2020 LM25183
PRODUCTION DATA
Select a feedback resistor, designated RFB, of 121 kΩ based on the secondary winding voltage at the end of the flyback conduction interval (the sum of the 12-V output voltage and the Schottky diode forward voltage drop as its current approaches zero) reflected by the transformer turns ratio of 1 : 1.