Here is a simple parameter introduction to the MEANWELL PS - 15 - 48 switching power supply:
Input Characteristics
Voltage Range: 85 - 264VAC or 120 - 370VDC.
Frequency Range: 47 - 63Hz.
Output Characteristics
Output Voltage: 48VDC.
Output Current: Rated 0.3125A, with a current range of 0 - 0.3125A.
Rated Power: 15W.
Ripple and Noise: Typically within 150mVp - p.
Voltage Regulation: Line regulation is within ±0.5%, and load regulation is within ±2.0%.