RDK-194 [Power Integrations]

The LED driver utilizes an isolated Flyback topology operating in continuous conduction mode. Output current regulation is sensed entirely from the primary side, eliminating the need for secondary side feedback components. No external current sensing is required on the primary side either as this is performed inside the IC. The internal controller adjusts the MOSFET duty cycle to maintain a sinusoidal input current for high power factor and low harmonic currents. Key features include TRIAC dimmer compatibility (including low-cost leading edge type) with no output flicker and >1000:1 dimming range, clean monotonic start-up, fast start-up (<300 ms), consistent dimming performance, high efficiency (≥85% at 115 VAC, ≥87% at 230 VAC), low cost, low component count, and small PCB footprint. Integrated protection features include output open circuit/short-circuit protection with auto-recovery, line input overvoltage shutdown, auto-recovering thermal shutdown with large hysteresis, and no damage during brown-out or brown-in conditions. Compliant with IEC 61000-4-5 ring wave, IEC 61000-3-2 Class C, and EN55015 B conducted EMI.