The LNK564DG is an energy efficient offline Switcher IC replaces all unregulated isolated linear transformer based power supplies up to 3W output power. For worldwide operation, a single universal input design replaces multiple linear transformer based designs. The self-biased circuit achieves an extremely low no-load consumption of under 150mW. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI. The oscillator incorporates circuitry that introduces a small amount of frequency jitter, typically 5% of the switching frequency, to minimize EMI. The modulation rate of the frequency jitter is set to 1kHz to optimize EMI reduction for both average and quasi-peak emissions. The frequency jitter, which is proportional to the oscillator frequency, should be measured with the oscilloscope triggered at the falling edge of the DRAIN voltage waveform.
● Lowest component count switcher
● Proprietary E-Shield™ transformer eliminates Y-capacitor
● Hysteretic thermal shutdown protection - Automatic recovery improves field reliability
● Universal input range allows worldwide operation
● Simple ON/OFF control, no loop compensation needed
● Easily meets all global energy efficiency regulations with no added components
● ON/OFF control provides constant efficiency to light loads - ideal for mandatory CEC regulations
● High bandwidth provides fast turn on with no overshoot and excellent transient load response
● Auto-restart reduces delivered power by >85% during short circuit and open loop fault conditions
● No-load consumption <150mW at 265VAC input
● Feedback input circuit
● Over temperature Protection
● 5.8V Regulator and 6.3V shunt voltage clamp
