PI Releases New 25 W LED T8 Lamp Ballast Power Supply Reference Design

Power Integrations (POWI) has released a new 25 W LED T8 lamp ballast power supply reference design - DER-287.

With over 91% efficiency, the DER-287 meets industry-leading levels and meets commercial requirements for power factor (PF greater than 0.9) and harmonic distortion (EN61000-3-2 Class C). A single-stage converter designed with LNK409EG, one of the LinkSwitch-PH series of LED driver ICs. Single-stage technology greatly extends product life by eliminating the need for optical isolators and large aluminum electrolytic capacitors used in traditional two-stage designs.


In addition, the DER-287 features a highly integrated monolithic design that integrates controller, driver and switching MOSFETs into one package. Power Integrations' LinkSwitch-PH product line includes overtemperature protection and overcurrent protection. Numerous protection features.

Andrew Smith, Product Marketing Manager, Power Integrations, said: "In terms of improving the overall luminous efficiency of lighting fixtures, achieving extremely high power conversion efficiency is as important as LED selection. If you do not use a single-stage topology, in a space-constrained T8 tube. It is extremely difficult to achieve efficiency above 88% in a cost-effective manner. The efficiency of this design is easily over 91%. For most regions, commercial and industrial lighting products must have low THD or high PF – LinkSwitch-PH LED driver ICs easily meet this specification, making the final design suitable for the global market.

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