NCP1126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 NCP1126 products integrates a fixed−frequency peak current mode controller with a low on− resistance high voltage, 650 V MOSFET. Available in a PDIP−7 package, the NCP1126 offers a high level of integration, including soft−start, frequency−jittering, short−circuit protection, thermal shutdown protection, frequency foldback mode and skip−cycle to reduce power consumption in light load condition, peak current mode control with adjustable internal ramp compensation and adjustable peak current set point.During nominal load operation, the part switches at one of the available frequencies (65 or 100 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads. When the power demand reduces further, it enters into a skip mode to reduce the standby consumption down to no load condition.Protection feature include: a timer to detect an overload or a short−circuit event with auto−recovery or latch protection, and a built−in VCC overvoltage protection.
The switcher also provides a jittered 65 kHz or 100 kHz switching frequency to improve the EMI.

特性 Features

• 650 V Avalanche Rated MOSFET
• Rugged MOSFET for robust design
• FixedFrequency 65 or 100 kHz CurrentMode Control Operation
• Ability to scale for efficiency or size
• Frequency Foldback Down to 26 kHz and SkipCycle in Light Load Conditions
• Eliminate acoustic noise and improved efficiency at light loads
• Adjustable Current Limit with External Resistor
• Scale for various designs 5W~20W
• 50 ms Timer-Based Auto-Recovery Short-Circuit Protection
• Provides more robust protection without worrying about the coupling of the aux winding
• Frequency Jittering in Normal and Frequency Foldback Modes
• Improved efficiency at light load / Improved EMI over the entire load
• Option for Auto-Recovery or Latched Short-Circuit Protection
• Flexible protection options
• Less than 100 mW Standby Power at High Line
• EPS 2.0 Compliant

应用 Application

• Power Supply
• Power supply for DVD, STB, CD-Player
• Aux supply for TV, USB, Appliance

简介

NCP1126属于集成电路（IC）的ACDC转换器离线开关。由制造生产的NCP1126AC 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。