LT3798集成電路（IC）的ACDC轉(zhuǎn)換器離線開關規(guī)格書PDF中文資料

LT3798屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關。由亞德諾半導體技術有限公司制造生產(chǎn)的LT3798AC DC 轉(zhuǎn)換器，離線開關該系列是元器件級控制產(chǎn)品，用于構建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設備。集成和未集成系統(tǒng)主要開關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“開關轉(zhuǎn)換器，SMPS 變壓器”標題。

DESCRIPTION

The LT?8301 is a micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start further reduce external component count. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 1.2A, 65V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5-lead ThinSOT? package.

FEATURES

■ 2.7V to 42V Input Voltage Range

■ 1.2A, 65V Internal DMOS Power Switch

■ Low Quiescent Current:

■ 100μA in Sleep Mode

■ 350μA in Active Mode

■ Boundary Mode Operation at Heavy Load

■ Low-Ripple Burst Mode? Operation at Light Load

■ Minimum Load <0.5 (Typ) of Full Output

■ VOUT Set with a Single External Resistor

■ No Transformer Third Winding or Opto-Isolator Required for Regulation

■ Accurate EN/UVLO Threshold and Hysteresis

■ Internal Compensation and Soft-Start

■ Output Short-Circuit Protection

■ 5-Lead TSOT-23 Package

■ AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

■ Isolated Telecom, Automotive, Industrial, Medical Power Supplies

■ Isolated Auxiliary/Housekeeping Power Supplies