SI9118集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器規(guī)格書PDF中文資料

SI9118屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由威世科技半導體制造生產的SI9118DC-DC 開關控制器PMIC（電源管理集成電路）DC 到 DC 開關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。其他拓撲結構可能包括：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。

FEATURES

? 10 to 200 V Input Range

? Current-Mode Control

? Internal Start-Up Circuit

? Buffer Slope Compensation Voltage

? Soft-Start

? 2.7 MHz Error Amp

? 500 mA Output Drive Current

? Light Load Frequency Fold-Back

? Low Quiescent Current

? Programmable Maximum Duty Cycle, with 80 as

Default

DESCRIPTION

The Si9118/Si9119 are a BiC/DMOS current-mode pulse

width modulation (PWM) controller ICs for high-frequency

dc/dc converters. Single-ended topologies (forward and

flyback) can be implemented at frequencies up to 1 MHz.

The controller operates in constant frequency mode during

the full load and automatically switches to pulse skipping

mode under light load to maintain high efficiency throughout

the full load range. The maximum duty cycle is easily

programmed with a resistor divider for optimum control.

The push-pull output driver provides high-speed switching to

external MOSPOWER devices large enough to supply 50 W

of output power. Shoot-through current for internal push-pull

stage is almost eliminated to minimize quiescent supply

current.

The push-pull output driver provides high-speed switching to

external MOSPOWER devices large enough to supply 50 W

of output power. Shoot-through current for internal push-pull

stage is almost eliminated to minimize quiescent supply

current.

The high-voltage DMOS transistor permits direct operation

from bus voltages of up to 200 V. Other features include a

1.5 accurate voltage reference, 2.7 MHz bandwidth error

amplifier, standby mode, soft-start and undervoltage lockout

circuits.

The Si9118/Si9119 are available in both standard and lead

(Pb)-free packages.