SG2845M集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器規(guī)格書PDF中文資料

SG2845M屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關(guān)式控制器。由美高森美公司制造生產(chǎn)的SG2845MDC-DC 開關(guān)控制器PMIC（電源管理集成電路）DC 到 DC 開關(guān)式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓?fù)浣Y(jié)構(gòu)可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。

DESCRIPTION

The SG1844/45 family of control ICs provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components. Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-bypulse current limiting and inherent protection of the power supply output switch.

KEY FEATURES

■ OPTIMIZED FOR OFF-LINE CONTROL

■ LOW START-UP CURRENT (<1mA)

■ AUTOMATIC FEED FORWARD COMPENSATION

■ TRIMMED OSCILLATOR DISCHARGE CURRENT

■ PULSE-BY-PULSE CURRENT LIMITING

■ ENHANCED LOAD RESPONSE CHARACTERISTICS

■ UNDER-VOLTAGE LOCKOUT WITH 6V HYSTERESIS (SG1844 only)

■ DOUBLE PULSE SUPPRESSION

■ HIGH-CURRENT TOTEM-POLE OUTPUT

■ INTERNALLY TRIMMED BANDGAP REFERENCE

■ 500kHz OPERATION

■ UNDERVOLTAGE LOCKOUT SG1844 - 16 volts SG1845 - 8.4 volts

■ LOW SHOOT-THROUGH CURRENT