NCP11377数据手册集成电路（IC）的ACDC转换器离线开关规格书PDF

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

应用 Application

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

简介

NCP11377属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP11377AC 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。