Off Line Switcher 7-Pin SOIC-C

The LinkZero-LP controller incorporates new technology which enables the device to automatically enter into and wake up from no-load mode or with 1 mW load while taking less than 5 mW from the AC power. IEC 62301 specifies measurements of standby power to a minimum accuracy of 10 mW, and so LinkZero-LP’s consumption of substantially less than 5 mW at 230 VAC rounds to zero based on the IEC definition. This low power level is also immeasurable on most power meters. The accurately specified FEEDBACK (FB) pin voltage reference enables universal input primary-side regulated power supplies with accurate constant voltage from 5% to full load. The start-up and operating power are derived directly from the DRAIN pin which eliminates start-up circuitry. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI, minimizing filter cost.

• Output Power - Adapter : 3 W
• Output Power - Open Frame : 3 W
• Lowest System Cost with Zero Standby (1 mW Output Power)
• Automatically enters low consumption power-down mode when load drops below ~0.2% of full load for LNK576 and ~0.6% for LNK574
• Detects load reconnection and automatically restarts regulation
• Simple upgrade to existing LinkSwitch-LP designs
• Very accurate IC parameter tolerances improve system manufacturing yield
• Suitable for low-cost clampless designs
• Frequency jittering greatly reduces EMI filter cost
• Extended package creepage improves system field reliability