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NCP1937BADAPGEVB:  90 W Adapter PFC+QR 10 MW Evaluation Board

This combination IC integrates power factor correction (PFC) and quasi-resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application.

The PFC stage exhibits near-unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.

The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used Action
NCP1937BADAPGEVB Active
Pb-free
90 W Adapter PFC+QR 10 MW Evaluation Board NCP1937A1DR2G NCP4304ADR2G
NCP4304AMNTWG NCP4304BDR2G
NCP4304BMNTWG NCP4355BDR2G
Technical Documents
Type Document Title Document ID/Size Rev
Eval Board: BOM NCP1937BADAPGEVB Bill of Materials ROHS Compliant NCP1937BADAPGEVB_BOM_ROHS.PDF - 290 KB  2 
Eval Board: Gerber NCP1937BADAPGEVB Gerber Layout Files (Zip Format) NCP1937BADAPGEVB_GERBERS.ZIP - 135 KB  2 
Eval Board: Schematic NCP1937BADAPGEVB Schematic NCP1937BADAPGEVB_SCHEMATIC.PDF - 366 KB  2 
Eval Board: Test Procedure NCP1937BADAPGEVB Test Procedure NCP1937BADAPGEVB_TEST_PROCEDURE.PDF - 156.0 KB  0 
Video Computer Solutions with NCP1937BADAPGEVB Evaluation Board TND6054/D  1 
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