Power Integrations has added devices that it advises are optimised for high-line applications, completing the roll-out of its LYTSwitch-4 LED-driver IC family. The company claims, these ICs deliver accurate output current and high efficiency for bulb and tube applications and high-bay lighting. The devices are said to simplify design and can reduce cost while ensuring that lamps are able to deliver uniform light output and so that they can provide exceptional performance in TRIAC-dimmable applications.
The ICs are said to feature a combined PFC and CC single-stage converter topology resulting in a power factor greater than 0.95 and efficiencies of over 90 percent in typical applications.
The company highlights that, designs based on the new drivers can easily meet EN61000-3-2C regulations for total harmonic distortion (THD); optimised designs are able to deliver less than 10 percent THD. Regulation is said to be better than +/- 5 percent across load and production spread, which can reduce the need for over-design to meet minimum luminance targets, cutting system cost. The devices’ high switching frequency (132 kHz) can enable smaller, lower-cost magnetics to be used, and frequency jittering can reduce EMI filtering requirements. These factors m help enable LED-driver designs to fit easily into space-restricted bulb styles.
The company adds that, designers can evaluate this new family using a new high-line LED lighting reference design that it has co-developed with Cree. The company advises its DER-396 describes a PAR38 spotlight LED driver design. These documents can be found at: http://www.powerint.com/ledrivers/cree.
The new ICs are said to enable small, longer-lasting lamps in a wide range of applications including consumer bulbs, commercial lighting and T8 tubes, industrial, high-bay and exterior lighting. These devices are also said to offer over-voltage, over-current and over-temperature protection. In addition they are claimed not to need an optocoupler or electrolytic bulk capacitors, which can potentially reduce component count and increase reliability.
Reference designs are downloadable at http://www.powerint.com/en/design-support/reference-designs/design-examples. Product datasheet and product introduction videos are also available on the Power Integrations website at http://www.powerint.com/products/lytswitch-family/lytswitch-4.
Power Integrations, Inc.
