NCP11367中文资料NCP11367: PWM Switcher, High Voltage, Primary Side for Low Power Offline SMPS数据手册ONSEMI规格书

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

应用 Application

Low power AC/DC Adapters
Set Top BoxBattery Charger

简介

NCP11367属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP11367AC 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。