®
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
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