JAJSGH4A November 2018 – July 2019 LM25180-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
Select a feedback resistor, designated RFB, of 158 kΩ based on the secondary winding voltage at the end of the flyback conduction interval (the sum of the 5-V output voltage and the Schottky diode forward voltage drop) reflected by the transformer turns ratio of 3 : 1. The forward voltage drop of the flyback diode is 0.3 V as its current approaches zero.