On December 4, Power Integrations, Inc. (Nasdaq: POWI), a leader in high-voltage integrated circuits for energy-efficient power conversion, released two high-efficiency, non-isolated, high-power applications for T8 lamp replacement applications. Factor (PF) LED driver reference design.
The new design features very few components and a simple core material and single-sided board design that delivers an industry-leading 14.2 W/in3 power density. The LED driver is based on Power Integrations' LinkSwitch-PL series IC device LNK460KG. Detailed circuit descriptions are available in DER-337 (high voltage input) and DER-345 (low voltage input). Both drives feature a single-stage, non-isolated topology that allows the driver to be only 8 mm thick – enough to fit behind the LEDs of the T8 tube.
The buck-boost (DER-337) or buck (DER-345) configuration provides a power factor of 0.9 or higher and a low THD to meet the EN61000-3-2 C limit. The design is compliant with EMI standards and easily meets EN55015 (EMI) Class B specifications. The integrated single-stage driver IC controls both the PFC and the constant current output, allowing the design to have fewer than 30 components. The drives are 92% (DER-337) and 89% (DER-345), respectively, with an output of 20 W (output voltage 85 V, output current 240 mA).
Andrew Smith, Product Marketing Manager at Power Integrations, said: "The LED tube market is moving toward non-isolated drives because it increases system efficiency while reducing the temperature of the drives and components. The number of components used in these boards is about isolated. half of the design, while the efficiency is generally 3-4% higher than the latter. Since the high and low THD PF, they are very suitable for ubiquitous commercial and industrial lighting applications. "
The new design features very few components and a simple core material and single-sided board design that delivers an industry-leading 14.2 W/in3 power density. The LED driver is based on Power Integrations' LinkSwitch-PL series IC device LNK460KG. Detailed circuit descriptions are available in DER-337 (high voltage input) and DER-345 (low voltage input). Both drives feature a single-stage, non-isolated topology that allows the driver to be only 8 mm thick – enough to fit behind the LEDs of the T8 tube.
The buck-boost (DER-337) or buck (DER-345) configuration provides a power factor of 0.9 or higher and a low THD to meet the EN61000-3-2 C limit. The design is compliant with EMI standards and easily meets EN55015 (EMI) Class B specifications. The integrated single-stage driver IC controls both the PFC and the constant current output, allowing the design to have fewer than 30 components. The drives are 92% (DER-337) and 89% (DER-345), respectively, with an output of 20 W (output voltage 85 V, output current 240 mA).
Andrew Smith, Product Marketing Manager at Power Integrations, said: "The LED tube market is moving toward non-isolated drives because it increases system efficiency while reducing the temperature of the drives and components. The number of components used in these boards is about isolated. half of the design, while the efficiency is generally 3-4% higher than the latter. Since the high and low THD PF, they are very suitable for ubiquitous commercial and industrial lighting applications. "
(This article is a PI submission)
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