NCP1343中文资料Quasi-Resonant Flyback Controller with Power Excursion Mode数据手册ONSEMI规格书

描述 Description

The NCP1343 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. It features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1343 enters quiet−skip mode to manage the power delivery while minimizing acoustic noise. Additionally, the NCP1343 integrates power excursion mode (PEM) to minimize transformer size in designs requiring high transient load capability.

特性 Features

• Power Excursion Mode (PEM)
• Minimize transformer size for peak power applications
• Minimum Peak Current Modulation for Rapid Frequency Foldback (RFF)
• Fast reduction of switching frequency for improved light load efficiency
• Integrated HV Startup with Brownout Protection
• Provides an efficient power-on source and protects against drops in input mains voltage
• Valley Switching Operation with Valley Lockout
• Maximizes the efficiency over the entire power range
• Quiet-Skip Technology
• Ensures Operation Outside Audible Range

应用 Application

• AC-DC Adapters
• Audio Power
• Notebook Adapters
• Smart Speakers & Subwoofers

简介

NCP1343属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP1343AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。