LED Driver ICs Deliver Tight Regulation And High Efficiency

Power Integrations' LYTSwitch family of LED driver ICs aims at consumer, commercial and industrial lighting applications. The new ICs deliver tight regulation and high efficiency for tube replacements and high-bay lighting, while improving performance in TRIAC-dimmable bulb applications. The ICs combine PFC and CC into a single switching stage, increasing driver efficiency to more than 90% in typical applications, delivering a power factor greater than 0.95 and meeting EN61000-3-2C requirements for total harmonic distortion. The combined single-stage converter topology eliminates high-voltage electrolytic bulk capacitors, leading to extended driver lifetimes even in high ambient temperatures. Accurate primary-side control yields true tight CC performance with better than +/-5% regulation across load and a wide temperature range and production variation. High switching frequency of 132 kHz allows small magnetics to be used in space-constrained bulb applications, while frequency jittering reduces EMI filter requirements. LYTSwitch LED driver samples are available now in eSIP-7C (E package) and eSIP-7F (L package), priced from $0.70 to $1.60 each/10,000.