Referring to the application note Boost, Flyback, SEPIC and Inverting Controller, I have tried to stimulate the output voltage using LTSPICE for the +/-12V circuit (Page 32).
The transformer is 1,2,3,4 windings in parallel at the input to Q1. The base inductance for the transformer winding is 3.9uH and so the effective L=1.225uH. The output is generated as +/-0.5V. When I substitute L=3.9uH the output is close to +/-12V.
Is the transformer inductance calculated as L=1.225 for four windings in parallel for the base L=3.9uH?