LT3798集成电路（IC）的ACDC转换器离线开关规格书PDF中文资料

LT3798属于集成电路（IC）的ACDC转换器离线开关。由亚德诺半导体技术有限公司制造生产的LT3798AC DC 转换器，离线开关该系列是元器件级控制产品，用于构建将交流市电转换为直流电（通常电压大幅降低）的设备。集成和未集成系统主要开关元件的器件均包括在内。由于高输入输出电压比，以及此类系统中通常需要隔离，这些器件通常与外部变压器配合使用。尽管通常使用定制变压器来实现此用途，但也有许多专门用于此用途的库存产品，请参见“开关转换器，SMPS 变压器”标题。

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