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ON Semi step-down controller reduces board space

Posted: 05 Nov 2003 ?? ?Print Version ?Bookmark and Share

Keywords:on semiconductor? ncp1651? controller?

ON Semiconductor has introduced the NCP1651 integrated controller that reduces both part count and overall design costs for power conversion applications such as battery chargers and distributed power systems up to 200W.

Providing a low-cost, low component-count solution that is compliant with IEC1000-3-2 harmonic standards for isolated ac/dc converters with mid-high output voltage requirements, the product's fixed-frequency continuous conduction mode (CCM) operation simplifies the design of the input EMI filter. The controller can also operate in discontinuous conduction mode.

Compared to a conventional power conversion design that uses a PFC controller followed by a dc/dc converter, the single-stage design of the NCP1651 eliminates one entire power switching section including the boost inductor, power MOSFET, high voltage capacitor and ancillary components.

The company also offers a design tool for the device that reduces the time needed to produce a first-pass working circuit from days to hours. Starting with a few key metrics provided by the design engineer, the tool uses a design methodology to select the correct component values and produce a complete bill of materials. The tool also displays graphs of key performance parameters to aid in system fine-tuning.

Available in a SO-16 package, the NCP1651 is priced at $1.50 in 10,000-unit quantities.

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