YX53XX is an isolated flyback converter that directly measures the voltage of the primary side flyback waveform output without the need for optocouplers or third windings for adjustment. Only one resistor is needed to set the output voltage. The internal compensation and soft start functions reduce the number of external components. In order to maintain high efficiency and minimize output voltage ripple, YX53XX operates in burst mode under light load. The YX53XX has undervoltage lockout (UVLO), short circuit protection (SCP), and over temperature protection (OTP) functions, which help the equipment operate safely and reliably.