NCP1602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 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 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 current controlled frequency foldback
Optimizes conversion efficiency across load range
Valley Synchronized Frequency Fold-back (VSFF)
Enhanced efficiency at light load conditions compared to CrM PFC
Works with or without a transformer w/ 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 TVHigh Power Adapters

简介

NCP1602属于集成电路（IC）的PFC（功率因数校正）。由制造生产的NCP1602PFC（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。