power supply 250w /300w

1. Small size and light weight: Since there is no power frequency transformer, the size and weight are only 20 to 30% of the linear power supply.

2. Low power consumption and high efficiency: The power transistor works in a switching state, so the power consumption on the transistor is small and the conversion efficiency is high, generally 60 to 70%, while the linear power supply is only 30 to 40%.