SI9120集成電路（IC）的ACDC轉(zhuǎn)換器離線(xiàn)開(kāi)關(guān)規(guī)格書(shū)PDF中文資料

SI9120屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線(xiàn)開(kāi)關(guān)。由威世科技半導(dǎo)體制造生產(chǎn)的SI9120AC DC 轉(zhuǎn)換器，離線(xiàn)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。

FEATURES

10- to 450-V Input Range

Current-Mode Control

125-mA Output Drive

Internal Start-Up Circuit

Internal Oscillator (1 MHz)

SHUTDOWN and RESET

DESCRIPTION

The Si9120 is a BiC/DMOS integrated circuit designed for use

in low-power, high-efficiency off-line power supplies.

High-voltage DMOS inputs allow the controller to work over a

wide range of input voltages (10- to 450-VDC). Current-mode

PWM control circuitry is implemented in CMOS to reduce

quiescent current to less than 1.5 mA.

A CMOS output driver provides high-speed switching for

MOSFET devices with gate charge, Qg, up to 25 nC, enough

to supply 30 W of output power at 100 kHz. These devices,

when combined with an output MOSFET and transformer, can

be used to implement single-ended power converter

topologies (i.e., flyback and forward).

The Si9120 is available in both standard and lead (Pb)-free

16-pin plastic DIP and SOIC packages which are specified to

operate over the industrial temperature range of ?40 C to

85 C.