LED-driver reference design promises 50,000-hour lifetimes for exterior lighting apps

Suitable for high-bay, exterior and street-lighting applications, the DER-340 LED-driver reference design from Power Integrations creates a long-lifetime, wide-range (90 VAC to 308 VAC), high-power-factor LED lighting power supply. The LED driver in DER-340 uses Power Integrations' LinkSwitch-PH family of power conversion ICs, which combine single-stage PFC and accurate CC output control. High-voltage aluminum electrolytic bulk capacitors are not required in the single-stage approach, making 50,000-hour lifetimes attainable. The single-stage topology also reduces component count, allowing for the use of single-sided boards and smaller enclosures. The DER-340 driver design is highly energy-efficient - above 88% at 230 VAC and over 87% at 120 VAC. Output current tolerance is less than 5% across line, load and temperature variations. Circuit protection features in the LinkSwitch-PHIC, including open/short/overvoltage protection and accurate hysteretic thermal shutdown, ensure reliability in rugged conditions. The driver meets all applicable international standards including IEC 61000-4-5, IEC 61000-3-2 Class C, and EN55015 B. Power Integrations