NCP1622: Power Factor Controller, Enhanced Light Load Efficiency

PublishTime：2021-10-25

●The 6-pin PFC controller NCP1622 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 NCP1622 (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 frequency foldback
■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
■Enhanced efficiency at light load conditions compared to CrM PFC
■Reduced inductor cost and simplified design
■Improved transient response for line and load steps

Brand of Product：	ON Semiconductor
Part#：	NCP1622 、 NCP1622BCCSNT1G 、 NCP1622BECSNT1G 、 NCP1622DCCSNT1G More Part#
Product Category：	Power Factor Controller 、 6-pin PFC controller More
Application：	[ Offline Power Supply ][ Flat panel TV ][ High Power Adapters ][ PC Power Supplies ][ Lighting Ballasts ][ Flat Screen TV ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	TSOP-6
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2/8/2020
Version Number：
Data Encoding：
Data Size：	153 KB

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