LT3798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

LT3798屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的LT3798AC DC 轉(zhuǎn)換器，離線開關(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(shí)現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請(qǐng)參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。

DESCRIPTION

The LT?8302/LT8302-3 is a monolithic 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 two external resistors and a third optional temperature compensation resistor. 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 3.6A, 65V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.

FEATURES

■ 3V to 42V Input Voltage Range

■ 3.6A, 65V Internal DMOS Power Switch

■ Low Quiescent Current:

■ 106μA in Sleep Mode

■ 380μA in Active Mode

■ Quasi-Resonant Boundary Mode Operation at Heavy Load

■ Low Ripple Burst Mode? Operation at Light Load

■ Minimum Load < 0.5 (Typ) of Full Output

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

■ Accurate EN/UVLO Threshold and Hysteresis

■ Internal Compensation and Soft-Start

■ Temperature Compensation for Output Diode

■ Output Short-Circuit Protection

■ Thermally Enhanced 8-Lead SO Package

■ AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

■ Isolated Automotive, Industrial, Medical Power Supplies

■ Isolated Auxiliary/Housekeeping Power Supplies