NCP1680数据手册集成电路（IC）的PFC（功率因数校正）规格书PDF

描述 Description

The NCP1680 is a CRM PFC controller IC designed to drive the bridgeless totem-pole PFC topology. The bridgeless totem-pole PFC is a power factor correction architecture that consists of a fast switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency. This topology eliminates the diode bridge present at the input of a conventional PFC circuit, allowing significant improvement in the power stage efficiency.

特性 Features

• Totem Pole PFC Topology Eliminates Input Diode Bridge
• Enables High Efficiency & Compact Design
• Critical Conduction Mode (CRM) Operation
• Optimized Performance Across Power Levels
• Discontinuous Conduction Mode (DCM) with Valley Turn On Under Light Load Condition
• Optimized Performance Across Power Levels
• Frequency Foldback in DCM With 25 kHz Minimum Frequency
• Prevents Operation in Audible Range
• Skip Mode in Very Light Load Condition
• Complies with Energy Efficiency Regulatory Standards
• Proprietary Current Sense Scheme
• Cycle-by-Cycle Current Limit Without Hall Effect Sensor
• Digital Voltage Loop Compensation
• Simplifies Design & Reduces External Components
• AC Line Monitoring Circuit & AC Phase Detection
• Simplifies Design & Reduces External Components
• Near Unity Power Factor in All Operating Modes
• Complies with Energy Efficiency Regulatory Standards
• PFC OK Indicator
• Allows Communication with Downstream Converter to Optimize System Performance

应用 Application

• Power Factor Correction
• Offline Power Supply
• Industrial Power Supplies
• Telecom 5G Power
• Networking Power
• Gaming Console Power Supplies
• UHD TV Power Supplies
• Computing Power Supplies

简介

NCP1680属于集成电路（IC）的PFC（功率因数校正）。由制造生产的NCP1680PFC（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。