This document introduces a highly compact and cost-effective step-down power supply designed using the LYTSwitchTM-0 series device (LYT0006P).
The power supply can operate from an input voltage range of 90 to 264 VAC. The DC bus voltage is high enough to support a 54 V output when using a buck topology. In a buck converter, the output voltage must always be lower than the input voltage. In addition, the output voltage is also limited by the maximum duty cycle of LYTSwitch-0, which also requires that the input voltage must be higher than the output voltage.