LNK520PN

Product Summary

The LNK520PN is an energy efficient, CV or CV/CC Switcher for Very Low Cost adapters and chargers. LinkSwitch is specifically designed to replace low power linear transformer/RCC chargers and adapters at equal or lower system cost with much higher performance and energy efficiency. The LNK520PN is equivalent to LNK500 but optimized for use with bias winding feedback and has improved switching characteristics for significantly reduced EMI. In addition, if bias and output windings are magnetically well coupled, output voltage load regulation can be improved. With efficiency of up to 75% and <300 mW no-load consumption, a LinkSwitch solution can save the end user enough energy over a linear design to completely pay for the full power supply cost in less than one year. The applications of the LNK520PN include Linear transformer replacement in all .3 W applications, Chargers for cell phones, cordless phones, PDAs, digital cameras, MP3/portable audio devices, shavers, etc., Home appliances, white goods and consumer electronics, Constant output current LED lighting applications, TV standby and other auxiliary supplies.

Parametrics

LNK520PN absolute maximum ratings: (1)DRAIN Voltage: -0.3 V to 700 V; (2)DRAIN Peak Current: 400 mA; (3)CONTROL Voltage: -0.3 V to 9 V; (4)CONTROL Current (not to exceed 9 V): 100 mA; (5)Storage Temperature: -65℃ to 150℃; (6)Operating Junction Temperature: -40℃ to 150℃; (7)Lead Temperature: 260℃.

Features

LNK520PN features: (1)Lowest cost and component count, constant voltage (CV) or constant voltage/constant current (CV/CC) solutions; (2)Optimized for bias winding feedback; (3)Up to 75% lighter power supply reduces shipping cost; (4)Primary based CV/CC solution eliminates 10 to 20 secondary components for low system cost; (5)Fully integrated auto-restart for short circuit and open loop fault protection saves external component costs; (6)42 kHz operation with optimized switching characteristics for significantly reduced EMI; (7)Universal input range allows worldwide operation; (8)Up to 70% reduction in power dissipation reduces enclosure size significantly; (9)CV/CC output characteristic without secondary feedback; (10)System level thermal and current limit protection; (11)Meets all single point failure requirements with only one additional bias capacitor; (12)Controlled current in CC region provides inherent soft-start; (13)Optional opto feedback improves output voltage accuracy; (14)Consumes <300 mW at 265 VAC input with no load; (15)Meets California Energy Commission (CEC), Energy Star, and EU requirements; (16)No current sense resistors - maximizes efficiency.

Diagrams

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