NCL2801中文资料临界导通模式（CrM）功率因数校正控制器，THD增强数据手册ONSEMI规格书

描述 Description

The NCL2801 is a current mode CRM Boost PFC control IC which can provide the best class THD performance over extended operating range utilizing ON Semiconductor’s THD enhancer technique. Efficiency and standby power are enhanced with Valley Count Frequency Fold-back (VCFF) method.

特性 Features

• Valley Count Frequency Foldback
• Maximize efficiency over wide load range
• Dynamic Response Enhancer
• Lower output undershoot
• Soft/Fast OVP
• Lower output overshoot
• THD Enhancer
• Improve THD performance
• Line level feed-forward
• Optimal loop gain in universal input
• Protections- Brown Out- Thermal Shutdown- OVP- Over Current limitation- Pin open/short protection
• High System Reliability
• Wide Vcc (10.5~28 V) range/ 3 Vcc startup level
• Design Flexibility
• OTA Error Amp
• Easy loop design and lower power loss by higher RFB

应用 Application

• All Off Line Appliances Requiring Power Factor Correction
• Lighting Ballasts (LED, Fluorescent)
• Flat TV
• PC Power Supplies

简介

NCL2801属于集成电路（IC）的PFC（功率因数校正）。由制造生产的NCL2801PFC（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。