NCP1366集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

NCP1366属于集成电路（IC）的ACDC转换器离线开关。由安森美半导体公司制造生产的NCP1366AC 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。

The NCP1361/66 offers a new solution targeting output power

levels from a few watts up to 20 W in a universal−mains flyback

application. Due to a novel method this new controller offers a

primary−side constant current control, saving secondary−side

components to perform current regulation.

The NCP1361/66 operates in valley−lockout quasi−resonant peak

current mode control mode at nominal load to provide high efficiency.

When the secondary−side power starts diminishing, the switching

frequency naturally increases until a voltage−controlled oscillator

(VCO) takes the lead, synchronizing the MOSFET turn−on in a

drain−source voltage valley. The frequency is thus reduced by

stepping into successive valleys until the number 4 is reached. Beyond

this point, the frequency is linearly decreased in valley−switching

mode until a minimum is hit. Valley lockout during the first four

drain−source valleys prevents erratic discrete jumps and provides

good efficiency in lighter load situations.

Features

• ±10 Current Regulation

• 560 V Startup Current Source

• No Frequency Clamp, 80 or 110 kHz Maximum Switching

Frequency Options

• Quasi−Resonant Operation with Valley Switching

Operation

• Fixed Peak Current & Deep Frequency Foldback @

Light Load Operation.

• External Constant Voltage Feedback Adjustment

• Cycle by Cycle Peak Current Limit

• Built−In Soft−Start

• Over & Under Output Voltage Protection

• Wide Operation VCC Range (up to 28 V)

• Low Start−up Current (2.5 A typ.) with NCP1361

• Clamped Gate−drive Output for MOSFET

• CS & Vs/ZCD pin Short and Open Protection

• Internal Temperature Shutdown

• Less than 30 mW No−Load Performance at High Line

with NCP1366 Version

• These are Pb−Free Devices

Typical Applications

• Low power ac−dc Adapters for Chargers

• Ac−dc USB chargers for Cell Phones, Tablets and Cameras