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Power Integrations’ LinkSwitch-PH LED Driver ICs Now Available in Low-Profile Package for Fluorescent Tube Replacements

18th November 2011

Power Integrations

ES Admin

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Power Integrations has announced the availability of LinkSwitch-PH LED driver ICs in a low-profile eSIP-L package that measures just 2 mm high. The new package targets LED-based replacements for fluorescent tubes, where very low-profile packages are required to fit into the small space available behind the LED circuit board, as well as other applications where board height is constrained.

LinkSwitch-PH devices in the 2-mm eSIP-L package have the same thermal and electrical performance as previously released ICs in the 10 mm high eSIP-E package. The new eSIP-L package features a heat transfer tab on top of the device which is electrically quiet (source potential) so any additional heatsink does not contribute to electrical noise propagation.

Power Integrations’ LinkSwitch-PH single-stage, primary-side controlled, LED driver ICs feature >90% efficiency and >0.9 power factor. The innovative topology eliminates the need for unreliable electrolytic capacitors and opto-isolators, making the devices especially well-suited for high-reliability industrial, commercial, and exterior solid-state lighting (SSL) applications. Suitable for designs from 4 W to 55 W, SSL driver ballasts based on LinkSwitch-PH ICs easily satisfy ENERGY STAR® and EN61000-3-2 class C and D requirements.

A new reference design featuring LinkSwitch-PH in the new eSIP-L package, RDR-257, describes a non-isolated, power-factor corrected, low-THD, high-efficiency LED driver circuit that fits inside a T8 tube fixture. The design powers an LED string with a nominal voltage of 36 V at a current of 330 mA, and operates from an input voltage range of 90 VAC to 265 VAC.

Comments Andrew Smith, product marketing manager at Power Integrations: “Competing T8 power supply solutions occupy the full diameter of the tube and several inches of tube length leaving a dark patch on one or sometimes both ends of the tube. PI’s new low-profile, eSIP-L package enables the power supply to be positioned on the underside of the LED PCB, with space on the front of the panel for LEDs. This facilitates even, consistent lighting across the whole length of the tube, resulting in better aesthetics and a discernibly better light distribution.”

LinkSwitch-PH samples in the eSIP-L package are available now, priced from $1.01 for 10,000-piece quantities.