NCP1622中文资料功率因数控制器，提高了轻型负载能效数据手册ONSEMI规格书

描述 Description

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 untilVcontrolreaches 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.

特性 Features

• Critical Conduction Mode with frequency foldback
• Optimizes conversion efficiency across load range
• Valley Synchronized Frequency Fold-back (VSFF)
• Enhanced efficiency at light load conditionscompared to CrM PFC
• Works with or without a transformerw/ ZCD winding
• Reduced inductor cost and simplified design
• Dynamic Response Enhancer
• Improved transient response for line and load steps

应用 Application

• Offline Power Supply
• Flat panel TV
• High Power Adapters
• PC Power Supplies
• Lighting Ballasts
• Flat Screen TV
• All Off Line Appliances Requiring Power Factor correction

简介

NCP1622属于集成电路（IC）的PFC（功率因数校正）。由制造生产的NCP1622PFC（功率因数校正）功率因数校正 (PFC) 是用于调整交流电路中的电压和电流之间的相位角，使之趋近于零的半导体器件。不同模式包括平均电流、边界导通、连续导通、临界导通、电流控制式频率折返、不连续和不连续导通，开关频率从 6 kHz 至 1.7 MHz 可调。