NCP1380DDR2G集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

NCP1380DDR2G属于集成电路（IC）的ACDC转换器离线开关。由安森美半导体制造生产的NCP1380DDR2GAC 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 NCP1380 hosts a high−performance circuitry aimed to

powering quasi−resonant converters. Capitalizing on a proprietary

valley−lockout system, the controller shifts gears and reduces the

switching frequency as the power loading becomes lighter. This

results in a stable operation despite switching events always occurring

in the drain−source valley. This system works down to the 4th valley

and toggles to a variable frequency mode beyond, ensuring an

excellent standby power performance.

To improve the safety in overload situations, the controller includes

an Over Power Protection (OPP) circuit which clamps the delivered

power at high−line. Safety−wise, a fixed internal timer relies on the

feedback voltage to detect a fault. Once the timer elapses, the

controller stops and stays latched for option A and C or enters

auto−recovery mode for option B and D.

Particularly well suited for adapter applications, the controller

features a pin to implement either a combined overvoltage /

overtemperature protection (Version A and B) or a combined

brown−out/overvoltage protection (Version C and D).

特性 Features

• Quasi−Resonant Peak Current−Mode Control Operation

• Valley Switching Operation with Valley−Lockout for Noise−Immune

Operation

• Frequency Foldback at Light Load to Improve the Light Load

Efficiency

• Adjustable Over Power Protection

• Auto−Recovery or Latched Internal Output Short−Circuit Protection

• Fixed Internal 80 ms Timer for Short−Circuit Protection

• Combined Overvoltage and Overtemperature Protection (A and B

Versions)

• Combined Overvoltage Protection and Brown−Out (C and D

Versions)

• +500 mA/−800 mA Peak Current Source/Sink Capability

• Internal Temperature Shutdown

• Direct Optocoupler Connection

• Extended VCC Range Operation Up to 28 V

• Extremely Low No−Load Standby Power

• SO−8 Package

• These Devices are Pb−Free and are RoHS Compliant

Typical Applications

• High Power ac−dc Converters for TVs, Set−Top Boxes etc.

• Offline Adapters for Notebooks