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
ProductStatusComplianceShort DescriptionParts Used
NCP1937BADAPGEVBActivePb-free90 W Adapter PFC+QR 10 MW Evaluation BoardNCP1937A1DR2G
NCP4304ADR2G
NCP4304AMNTWG
NCP4304BDR2G
NCP4304BMNTWG
NCP4355BDR2G
Technical Documents
TypeDocument TitleDocument ID/SizeRev
Eval Board: BOMNCP1937BADAPGEVB Bill of Materials ROHS CompliantNCP1937BADAPGEVB_BOM_ROHS.PDF - 290 KB2
Eval Board: GerberNCP1937BADAPGEVB Gerber Layout Files (Zip Format)NCP1937BADAPGEVB_GERBERS.ZIP - 135 KB2
Eval Board: SchematicNCP1937BADAPGEVB SchematicNCP1937BADAPGEVB_SCHEMATIC.PDF - 366 KB2
Eval Board: Test ProcedureNCP1937BADAPGEVB Test ProcedureNCP1937BADAPGEVB_TEST_PROCEDURE.PDF - 156.0 KB0
VideoComputer Solutions with NCP1937BADAPGEVB Evaluation BoardTND6054/D1
NCP1937BADAPGEVB BOM ROHS NCP1937BADAPGEVB
NCP1937BADAPGEVB GERBERS NCP1937BADAPGEVB
NCP1937BADAPGEVB SCHEMATIC NCP1937BADAPGEVB
NCP1937BADAPGEVB TEST PROCEDURE NCP1937BADAPGEVB
NCP1937BADAPGEVB