LNK500

® LNK500 LinkSwitch Family Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers Product Highlights Cost Effective Linear/RCC Replacement • Lowest cost and component count, constant voltage (CV) or 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 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 Example Characteristic Min Typ (CV only) (CV/CC) ±10% VO ±5% ±25%* For Circuit Shown Above IO (b) ±25%* With Optional Secondary Feedback** IO *Estimated tolerance achievable in high volume production including transformer and other component tolerances. **See Optional Secondary Feedback section. PI-3415-021103 Figure 1. Typical Application – not a Simplified Circuit (a) and Output Characteristic Tolerance Envelopes (b). EcoSmart - Extremely Energy Efficient • Consumes