56W Off-line, 120VAC with PFC, 160V, 350mA Load, Dimmer Switch Compatible LED Driver

Focus:

A design based on the HV9931 IC implements a power-factor-corrected, 100-Vac to 135-Vac input, 20-V to 160-V 350-mA dc output nonisolated, power supply for driving high-power LEDs. This power supply is compatible with standard (triac-based) dimmer switches. This design employs the Bibred topology, which suits applications with modest step-down ratio. Bill-of-materials and performance results are presented.

What you’ll learn:

• How to build a 120-Vac input, 20-V to 160-V 350-mA dc output nonisolated power supply for driving high-power LEDs
• How to build a dimmable, power-factor-corrected 56-W power supply for driving high-power LEDs

Notes:

Supertex Design Note DN-H05

View the Source

Author & Publication:

no author listed, Supertex, Vendor website, Feb 26 2009

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