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LNK501G

Power Integrations Inc.
Part Number LNK501G
Manufacturer Power Integrations Inc.
Description Energy Efficient/ CV/CC Switcher for Very Low Cost Chargers and Adapters
Published Mar 22, 2005
Detailed Description ® LNK501 LinkSwitch™ Family Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters Product Highlights...
Datasheet PDF File LNK501G PDF File

LNK501G
LNK501G

Overview
® LNK501 LinkSwitch™ Family Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters Product Highlights Cost Effective Linear/RCC Replacement • Lowest cost, component count, constant voltage, constant current (CV/CC) solution • Extremely simple circuit configuration • Up to 75% lighter power supply reduces shipping cost • Primary based CV/CC solution eliminates 10 to 20 secondary components for low system cost • Combined primary clamp, feedback, IC supply, and loop compensation functions–minimizes external components • Fully integrated auto-restart for short circuit and open loop fault protection–saves external component costs • 42 kHz operation simplifies EMI filter design • 3 W output with EE13 core for low cost and small size Much Higher Performance Over Linear/RCC • Universal input range allows worldwide operation • Up to 70% reduction in power dissipation–reduces enclosure size significantly • CV/CC output characteristic without secondary feedback • System level thermal and current limit protection • Meets all single point failure requirements with only one additional clamp capacitor • Controlled current in CC region provides inherent soft-start • Optional opto feedback improves output voltage accuracy LinkSwitch D C S Wide Range HV DC Input DC Output (VO) (a) VO ±10% VO ±5% ±20%* For Circuit Shown Above IO (b) ±20%* With Optional Secondary Feedback** IO *Estimated tolerance achievable in high volume production including transformer and other component tolerances.
**See Optional Secondary Feedback section.
PI-2776-091302 Figure 1.
Typical Application – not a Simplified Circuit (a) and Output Characteristic Tolerance Envelopes (b).
EcoSmart - Extremely Energy Efficient • Consumes <300 mW at 265 VAC input with no load • Meets Blue Angel, Energy Star, and EC requirements • No current sense resistors–maximizes efficiency Applications • Linear transformer replacement in all ≤ 3 W applications • Chargers for cell phones, cordless phones, PD...


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