FPN1903A Switching power supply

This is a switching power supply with model number FPN1903A and serial number (S/N) 085SKG02PG. It has a PS/CH

(power/control signal) function and can operate in the voltage range of AC 100-240V. Please note that when using this power supply,

the relevant safety specifications need to be followed to ensure the safe and stable operation of the equipment.

AFPS-01C

FPN1903A switching power supply is a device that converts other forms of energy into electrical energy, which is usually composed of a main circuit,

a control circuit and an auxiliary power supply. The main circuit includes impulse current limiting, input filter, rectification and filtering, inverter, output

rectification and filtering, etc. The control circuit samples from the output, compares it with the set value, and then controls the inverter to

change its pulse width or pulse frequency to make the output stable. The auxiliary power supply realizes the software (remote) start of

the power supply, and supplies power to the protection circuit and control circuit (PWM and other chips).