Abstract: A multiple output power supply with a constant volt-second clamp circuit is provided. The multiple output power supply includes a transformer having a primary winding electrically connected to a supply voltage and at least two secondary windings for providing multiple output voltages, and a constant volt-second clamp circuit electrically connected to the primary winding for achieving a constant volt-second product clamp over a varying input voltage at the primary winding where the constant volt-second product clamp over the varying input voltage at the primary winding is independent of a load effect of the secondary windings.