NCP1623中文资料临界导通模式（CrM）功率因数矫正控制器，升压跟随器数据手册ONSEMI规格书

描述 Description

The NCP1623 is a controller designed to drive PFC boost stages. Based on an innovative Valley Synchronized Frequency Fold-back (VSFF) method, it operates in critical conduction mode (CrM) until the power drops below a threshold level. The PFC controller enters discontinuous conduction mode (DCM) with increased dead-time as the load further decays (frequency foldback). VSFF maximizes the efficiency at both nominal and light loads. In addition, an internal circuitry ensures a near-unity power factor even when the switching frequency is reduced.
Housed in a TSOP-6 package, the circuit also incorporates the features necessary for robust and compact PFC stages, with few external components. The A version provides the follower boost capability for drastic low-line efficiency improvement. This controller is also available in the SOIC-8 package, which features an ultra-low-consumption mode externally controlled by the disable pin.

特性 Features

• Critical Conduction Mode (CrM) in heavy load conditions
• Maximizes the efficiency at both nominal and light loads
• Discontinuous Conduction Mode (DCM) with Frequency Foldback in light load
• Maximizes the efficiency at both nominal and light loads
• Follower Boost capability (NCP1623A only)
• Improves low line and full load efficiency
• Sleep Mode with circuit consumption below 100 µA (SOIC-8 version only)
• Improves no load and ultra light load efficiency
• Zero Current Detection via Drain sensing
• Simplifies PFC inductor design, eliminates auxiliary winding
• Dynamic Response Enhancer
• Fast line & load transient response
• Near unity power factor over the load range
• Meets typical power supply spec

应用 Application

• Power Factor Correction
• Offline Power Supply
• USB PD Mobile & Laptop Charging
• Industrial Power Supplies
• Computing Power Supplies
• Gaming Power Supplies

简介

NCP1623属于集成电路（IC）的PFC（功率因数校正）。由制造生产的NCP1623PFC（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。