... of power supply, this high-powered switch convectorcan change AC220V to DC12V-3A steadily, introduce advanced PWM controller, hadwidely use ... form: Series Number Mode Name Description 1 CHD-PS212 AC220V to DC12V/3A switch power supply Input: 220V Output:12V ... powered PWM controller, make frequency conversion to the input high alternating current voltage, change to lower voltage, big current output, ...