描述 Description

The NCP11367 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.
The NCP11367 operates in valley lockout quasi?resonant peak current mode control mode at high load to provide high efficiency. When the power on the secondary side starts to diminish, the controller automatically adjusts the duty?cycle then at lower load the controller enters in pulse frequency modulation at fixed peak current with a valley switching detection. This technique allows keeping the output regulation with tiny dummy load. Valley lockout at the first 4 valleys prevent valley jumping operation and then a valley switching at lower load provides high efficiency.

特性 Features

Internal Temperature Shutdown
Device protected from high operating temperatures
Internal and fixed Frequency Jittering
Improved EMI Signature
Integrated 650 V Power MOSFET with rds(on) of 3.2 Ω Typical @ 25°C
Constant Voltage Primary?Side Regulation
Internal Line FeedForward
Quasi?Resonant with Valley Switching Operation
Optimized light load efficiency and Stand?by performance
Frequency clamp options
Cycle by Cycle Peak Current Limit
Output Voltage Under Voltage and Over Voltage Protection
Secondary diode or winding Short?Circuit Protection
UVP Built?in Blanking Time to support 5000 μF Capacitive Load Capability
Low Start?up current
CS & Vs/ZCD pin Short and Open Protection
Cable Drop compensation adjustment

應(yīng)用 Application

Low power AC/DC Adapters
Set Top BoxBattery Charger

簡介

NCP11367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NCP11367AC 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。