NCP1200集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)規(guī)格書PDF中文資料

NCP1200屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由安森美半導(dǎo)體公司制造生產(chǎn)的NCP1200AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(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實現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。

Housed in SOIC?8 or PDIP?8 package, the NCP1200 represents a

major leap toward ultra?compact Switchmode Power Supplies. Due to

a novel concept, the circuit allows the implementation of a complete

offline battery charger or a standby SMPS with few external

components. Furthermore, an integrated output short?circuit

protection lets the designer build an extremely low?cost AC?DC wall

adapter associated with a simplified feedback scheme.

With an internal structure operating at a fixed 40 kHz, 60 kHz or

100 kHz, the controller drives low gate?charge switching devices like

an IGBT or a MOSFET thus requiring a very small operating power.

Due to current?mode control, the NCP1200 drastically simplifies the

design of reliable and cheap offline converters with extremely low

acoustic generation and inherent pulse?by?pulse control.

When the current setpoint falls below a given value, e.g. the output

power demand diminishes, the IC automatically enters the skip cycle

mode and provides excellent efficiency at light loads. Because this

occurs at low peak current, no acoustic noise takes place.

Finally, the IC is self?supplied from the DC rail, eliminating the

need of an auxiliary winding. This feature ensures operation in

presence of low output voltage or shorts.

Features

? No Auxiliary Winding Operation

? Internal Output Short?Circuit Protection

? Extremely Low No?Load Standby Power

? Current?Mode with Skip?Cycle Capability

? Internal Leading Edge Blanking

? 250 mA Peak Current Source/Sink Capability

? Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz

? Direct Optocoupler Connection

? Built?in Frequency Jittering for Lower EMI

? SPICE Models Available for TRANsient and AC Analysis

? Internal Temperature Shutdown

? These Devices are Pb?Free, Halogen Free/BFR Free and are RoHS Compliant

Typical Applications

? AC?DC Adapters

? Offline Battery Chargers

? Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)