NCP1380DDR2G集成電路（IC）的ACDC轉(zhuǎn)換器離線開(kāi)關(guān)規(guī)格書(shū)PDF中文資料

NCP1380DDR2G屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開(kāi)關(guān)。由安森美半導(dǎo)體公司制造生產(chǎn)的NCP1380DDR2GAC DC 轉(zhuǎn)換器，離線開(kāi)關(guān)該系列是元器件級(jí)控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開(kāi)關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類(lèi)系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來(lái)實(shí)現(xiàn)此用途，但也有許多專(zhuān)門(mén)用于此用途的庫(kù)存產(chǎn)品，請(qǐng)參見(jiàn)“開(kāi)關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。

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).

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