Items

Traditional power supply

High frequency high voltage switching power supply

Output ripple coefficient

High

Nearly ideal, generally less than 5%, if specially asked, less than 0.1%

Precision of voltage controlling

General

High precision

Input voltage adaptation

High

Very low

Output voltage adaptation

High

Load changing, but output voltage almost the same

Output adaptation range

Small

Big

Speed of protecting circuits

Low>10ms

Fast speed, generally response time <1 μ S

Power factor

Low, polluting the transmission-lines of electric power a lot

High, power factor can be over 95% with PFC circuits

Power supply changing frequency

Low

High

Shape size

Bulky

Flexible and small