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LYTSwitch-4 ICs offer high efficiency for lighting products

22 Nov 2013

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Power Integrations has launched high-line models of its LYTSwitch-4 family of LED-driver ICs for bulb and tube applications and high-bay lighting. With its combined PFC and CC single-stage converter topology, the LYTSwitch-4 ICs can deliver more than 90 per cent efficiency and a power factor higher than 0.95. Aside from typical lighting, the product also caters to TRIAC-dimmable applications, particularly in Asian and European lighting markets.

LYTSwitch-4 ICs are compliant with EN61000-3-2C regulations for total harmonic distortion (THD), delivering less than 10 per cent THD. Regulation is better than ± 5 per cent across load and production spread, reducing the need for over-design to meet minimum luminance targets, cutting system cost. The devices' high switching frequency (132kHz) enables smaller, lower-cost magnetics to be used, and frequency jittering reduces EMI filtering requirements. These factors enable LED-driver designs to fit easily into space-restricted bulb styles.

Devices that can benefit from the LYTSwitch-4 ICs include consumer bulbs, commercial lighting and T8 tubes, industrial, high-bay and exterior lighting. LYTSwitch devices also offer all the usual safety features common to Power Integrations products, including over-voltage, over-current and over-temperature protection. In addition, LYTSwitch devices do not need an optocoupler or electrolytic bulk capacitors, reducing component count and increasing reliability. High-line LYTSwitch-4 ICs are sampling now in eSIP-7C (E) and eSIP-7F (L) packages, priced from $0.58 (non-dimming) to $0.62 (dimming) in 10,000-piece quantities.

Designers can evaluate the new LYTSwitch-4 LED-driver IC family using a new high-line LED lighting reference design that has been co-developed with Cree.

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