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

應(yīng)用 Application

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

簡介

NCP1343屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由制造生產(chǎn)的NCP1343AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來實(shí)現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。