Isolated LED Driver Using the HV9910B

Focus:

A design based on the HV9910B IC implements an universal-input, 4-V to 16-V 350-mA output isolated power supply for driving LEDs. This flyback design which uses an optocoupler for secondary-side feedback, typically achieves better than 1% regulation over line and load and complies with CISPR-15 EMI requirements for general lighting. Transformer winding instructions and bill-of-materials are presented.

What you’ll learn:

• How to build a universal-input, 4-V to 16-V 350-mA output isolated power supply for driving high-power LEDs

Notes:

Supertex Design Note DN-H01

View the Source

Author & Publication:

no author listed, Supertex, Vendor website, Feb 20 2009

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