NCP1602: Power Factor Controller, Enhanced Light Load Efficiency

The 6-pin PFC controller NCP1602 is designed to drive PFC boost stages. It is based on an innovative Valley Synchronized Frequency Fold-back (VSFF) method. In this mode, the circuit classically operates in Critical conduction Mode (CrM) when control voltage exceeds a programmable value Vctrl,FF. When Vcontrol is below this preset level Vctrl,FF, the NCP1602 (versions [B**] and [D**]) linearly decays the frequency down to about 30 kHz until Vcontrol reaches the SKIP mode threshold. VSFF maximizes the efficiency at both nominal and light load. In particular, the stand-by losses are reduced to a minimum. Like in FCCrM controllers, internal circuitry allows near-unity power factor even when the switching frequency is reduced. Housed in a TSOP6 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components.

Features
  • Critical Conduction mode with current controlled frequency foldback
  • Two-Level Boost Follower Line Level Dependent
  • Valley Synchronized Frequency Fold-back (VSFF)
  • Works with or without a transformer w/ ZCD winding
  • Dynamic Response Enhancer
Benefits
  • Optimizes conversion efficiency across load range
  • Higher efficiency
  • Enhanced efficiency at light load conditions compared to CrM PFC
  • Reduced inductor cost and simplified design
  • Improved transient response for line and load steps
Applications
  • Offline power supply
End Products
  • Flat Panel TV
  • High Power Adapters
Design & Development Tools (2)
Document TitleDocument ID/SizeRevisionRevision Date
Excel Spreadsheet for Designing a Power Factor Correction ApplicationNCP1602 DESIGN EXCEL SPREADSHEET (344kB)1Jul, 2016
Excel Spreadsheet for Helping the Choice of Frequency Foldback Product OptionAN1602 FFB OPTIONS SELECTION (44kB)0Jan, 2016
Package Drawings (1)
Document TitleDocument ID/SizeRevision
TSOP-6318G-02 (64.1kB)V
Application Notes (4)
Document TitleDocument ID/SizeRevisionRevision Date
5 Key Steps to Designing a Compact, High-Efficiency PFC Stage Using the NCP1602AND9218/D (281kB)3Jun, 2016
Good Practice for the NCP1602 CSZCD Pin Design and PCB LayoutAND9454/D (200kB)0Jun, 2016
How to Select the Frequency Foldback Product Option When Designing a Compact, High-Efficiency PFC Stage Using the NCP1602AND9364/D (252kB)0Jan, 2016
How to Use Auxiliary Winding Voltage for Biasing the NCP1602 CSZCD PinAND9455/D (478kB)0Jun, 2016
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1602-E_SIMPLIS_MODEL_June_7th_2016.zipNCP1602 SIMPLIS MODEL (3975kB)0Jun, 2016
Evaluation Board Documents (15)
Document TitleDocument ID/SizeRevisionRevision Date
160-W, Wide Mains, PFC Stage Driven by the NCP1602 Evaluation Board User's ManualEVBUM2302/D (820kB)0Jun, 2015
Implementation High Power Notebook Adapter Evaluation Board User's ManualEVBUM2341/D (1442kB)1Feb, 2016
Implementing All-in-One PC Power Supply Evaluation Board User's ManualEVBUM2342/D (1827kB)1Dec, 2015
NCP1399ADPGEVB Bill Of Materials (ROHS Compliant)NCP1399ADPGEVB_BOM_ROHS.pdf (117kB)0
NCP1399ADPGEVB Gerber Layout Files (Zip Format)NCP1399ADPGEVB_GERBER.rev0.zip (85kB)0
NCP1399ADPGEVB SchematicNCP1399ADPGEVB_SCHEMATIC.pdf (123kB)0
NCP1399ADPGEVB Test ProcedureNCP1399ADPGEVB_TEST_PROCEDURE.pdf (94kB)1
NCP1399AIOGEVB Bill Of Materials (ROHS Compliant)NCP1399AIOGEVB_BOM_ROHS.pdf (120kB)0
NCP1399AIOGEVB Gerber Layout Files (Zip Format)NCP1399AIOGEVB_GERBER.zip (232kB)0
NCP1399AIOGEVB SchematicNCP1399AIOGEVB_SCHEMATIC.pdf (724kB)1
NCP1399AIOGEVB Test ProcedureNCP1399AIOGEVB_TEST_PROCEDURE.pdf (61kB)0
NCP1602BOOSTGEVB Bill Of Materials ROHS CompliantNCP1602BOOSTGEVB_BOM_ROHS.pdf (170kB)1
NCP1602BOOSTGEVB Gerber Layout Files (Zip Format)NCP1602BOOSTGEVB_GERBER.zip (74kB)0
NCP1602BOOSTGEVB SchematicNCP1602BOOSTGEVB_SCHEMATIC.pdf (379kB)0
NCP1602BOOSTGEVB Test ProcedureNCP1602BOOSTGEVB_TEST_PROCEDURE.pdf (95kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Enhanced, High-Efficiency Power Factor ControllerNCP1602/D (231kB)3Jan, 2017
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1399ADPGEVBActivePb-free150W Adapter Power Supply Evaluation Board
NCP1399AIOGEVBActivePb-free240W All-in-One PC Power Supply Evaluation Board
NCP1602BOOSTGEVBActivePb-freePFC Boost Converter, Universal Input, 390V 450mA Output Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1602ABASNT1GActivePb-free Halide freeTSOP-6318G-021Tape and Reel3000$0.3
NCP1602AEASNT1GActivePb-free Halide freeTSOP-6318G-021Tape and Reel3000$0.3
NCP1602DCCSNT1GActivePb-free Halide freeTSOP-6318G-021Tape and Reel3000$0.4
NCP1602DFCSNT1GActivePb-free Halide freeTSOP-6318G-021Tape and Reel3000$0.4
Specifications
ProductPFC ModeFrequency OperationControl ModeTopologyfSW Typ (kHz)VCC Max (V)Drive Cap. (mA)UVLO (V)LatchUVPInhibition
NCP1602ABASNT1GCRMVariableCurrent ModeStep-UpVariable30500 / 800YesYesNo
NCP1602AEASNT1GCRMVariableCurrent ModeStep-UpVariable30500 / 800YesYesNo
NCP1602DCCSNT1GCRMVariableCurrent ModeStep-UpVariable30500 / 800YesYesNo
NCP1602DFCSNT1GCRMVariableCurrent ModeStep-UpVariable30500 / 800YesYesNo
Enhanced, High-Efficiency Power Factor Controller (231kB) NCP1602
Excel Spreadsheet for Designing a Power Factor Correction Application NCP1602
Excel Spreadsheet for Helping the Choice of Frequency Foldback Product Option NCP1602
5 Key Steps to Designing a Compact, High-Efficiency PFC Stage Using the NCP1602 NCP1602
Good Practice for the NCP1602 CSZCD Pin Design and PCB Layout NCP1612
How to Select the Frequency Foldback Product Option When Designing a Compact, High-Efficiency PFC Stage Using the NCP1602 NCP1602
How to Use Auxiliary Winding Voltage for Biasing the NCP1602 CSZCD Pin NCP1602
NCP1602-E_SIMPLIS_MODEL_June_7th_2016.zip NCP1602
EVBUM2302/D - 820 KB NCP1602BOOSTGEVB
EVBUM2341/D - 1442 KB NCP1399ADPGEVB
EVBUM2342/D - 1827 KB NCP1399AIOGEVB
NCP1399ADPGEVB BOM ROHS NCP1399ADPGEVB
NCP1399ADPGEVB GERBER NCP1399ADPGEVB
NCP1399ADPGEVB SCHEMATIC NCP1399ADPGEVB
NCP1399ADPGEVB TEST PROCEDURE NCP1399ADPGEVB
NCP1399AIOGEVB BOM ROHS NCP1399AIOGEVB
NCP1399AIOGEVB GERBER NCP1399AIOGEVB
NCP1399AIOGEVB SCHEMATIC NCP1399AIOGEVB
NCP1399AIOGEVB TEST PROCEDURE NCP1399AIOGEVB
NCP1602BOOSTGEVB BOM ROHS NCP1602BOOSTGEVB
NCP1602BOOSTGEVB GERBER NCP1602BOOSTGEVB
NCP1602BOOSTGEVB SCHEMATIC NCP1602BOOSTGEVB
NCP1602BOOSTGEVB TEST PROCEDURE NCP1602BOOSTGEVB
TSOP-6 STF202