irplhalo1e| Application Note
IRPLHALO1E revB
International Rectifier 233 Kansas Street, El Segundo, CA 90245 USA
100VA dimmable electronic convertor for low voltage lighting
By Peter Green
TOPICS COVERED
Introduction Functional Description Supplying Vcc to the IR2161 Soft Start Operation Run Mode Shut Down Operation Calculating RCS Output Transformer Selection Short Circuit Current Adaptive Dead Time Dimming EMC Issues Layout Issues
Component Selection
Bill of Materials
Introduction Until now, almost all electronic convertors (often called electronic transformers) for Low Voltage filament lamp applications have up to now been based around self-resonating bipolar transistor half-bridge circuits. A new approach, using power MOSFETs driven by a control IC incorporating additional functionality tailored to this application, is realized in the IR2161 and demonstrated in a typical application by the IRPLHALO1E reference design kit. The IR2161 is a dedicated intelligent half bridge driver IC for a Halogen convertor (1) or "Electronic Transformer" targeted at medium and high end performance low voltage lighting applications. The goal has been to incorporate as much functionality as possible within a low cost 8 pin DIP or SOIC package to allow reliability and performance advantages over existing circuit designs with a lower component count.
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