A New Procedure for High-Frequency Electronic Ballast Design

Focus:

A procedure described here simplifies the design of the output stage of high-frequency lamp ballasts. The procedure relies on commonly available fluorescent lamp specifications supplied by the lamp manufacturer, rather than hard-to-find high-frequency lamp data. Designers can use this procedure to predict lamp operating points including pre-heat, ignition, and running conditions for lamps of different geometries and wattages. Benefits of this procedure include faster ballast design including a reduction in the time required to size a ballast for different lamps, and also an ability to optimize ballast size and cost. The procedure is demonstrated with a ballast design example based on the IR21571 controller IC, which powers a 36W/T8 lamp.

What you’ll learn:

• How to design the output stage of a high-frequency electronic lamp ballast based on preheat, ignition and running lamp requirements
• How to scale lamp ballast designs for different-sized fluorescent lamps

Notes:

International Rectifier White Paper originally presented at IEEE Industry Applications Society Annual Meeting.

View the Source

Author & Publication:

Thomas J. Ribarich and John J. Ribarich (conslt.), International Rectifier, Power Integrated Circuits, El Segundo, CA, Vendor website, Oct 12 1998

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