UC3844集成电路（IC）DC-DC开关控制器规格书PDF中文资料

DESCRIPTION

TheUC3842/3/4/5family of controlICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes witha minimal external parts count.

■ OPTIMIZED FOR OFF-LINE AND DC TO DC

CONVERTERS

■ LOW START-UP CURRENT (< 1 mA)

■ AUTOMATIC FEED FORWARD COMPENSATION

■ PULSE-BY-PULSECURRENT LIMITING

■ ENHANCED LOAD RESPONSE CHARACTERISTICS

■ UNDER-VOLTAGE LOCKOUTWITH HYSTERESIS

■ DOUBLE PULSE SUPPRESSION

■ HIGH CURRENT TOTEM POLE OUTPUT

■ INTERNALLY TRIMMED BANDGAP REFERENCE

■ 500 KHz OPERATION

■ LOW RO ERRORAMP

UC3844属于集成电路（IC） > DC-DC 开关控制器。意法半导体（ST）集团制造生产的UC3844DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。