描述 Description

The NCP11377 offers a new integrated FET solution targeting output power levels up to 12 W continuously in a universal?mains flyback application. Thanks to a Novel Method this new controller saves the secondary feedback circuitry for Constant Voltage and Constant Current regulation, achieving excellent line and load regulation without traditional optocoupler and TL431 voltage reference.

特性 Features

Integrated 650 V Power MOSFET with rds(on) of 3.2 Ω Typical @ 25°C
Low BOM counts eliminating secondary network
Constant Voltage Primary?Side Regulation
Low power standby
Internal Line FeedForward
High efficiency by quasi resonant switching and no secondary feedback power consumption
Quasi?Resonant with Valley Switching Operation
Thin SMD package for low profile converter
Optimized light load efficiency and Stand?by performance
Frequency clamp options
LFF and BO Feature on a Dedicated Pin
Cycle by Cycle Peak Current Limit
Output Voltage Under Voltage and Over Voltage Protection (UVP or OVP)
Secondary diode or winding Short?Circuit Protection
UVP Built?in Blanking Time to support 5000 μF Capacitive Load Capability
Cable Drop compensation adjustment
Wide Operation VCC range (up to 28 V)
Low Start?up current
CS & Vs/ZCD pin Short and Open Protection
Internal Temperature Shutdown
Internal and fixed Frequency Jittering for Better EMI Signature
These are Pb?Free Devices @ 25°C

應(yīng)用 Application

Low power AC/DC Adapters for Routers and Set?Top Box
Set Top BoxBattery Charger

簡介

NCP11377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NCP11377AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級(jí)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(qǐng)參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。