Datasheet > SIC9954

SIC9954

更新时间： 2022-05-14 22:19:51

品牌	Logo	应用领域
深爱 - SISEMIC		/
页数	文件大小	规格书
11页	798K
描述
Non-Isolated Buck Sections Switch Dimming LED Driver

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SIC9954 数据手册

深圳深爱半导体股份有限公司

Shenzhen SI Semiconductors Co., LTD.

产品规格书

Product Specification

Non-Isolated Buck Sections Switch Dimming LED Driver SIC9952(B)/9953(B)/9954(B)

General Description

The SIC9952(B)/9953(B)/9954(B) are high-precision buck four(4) or three(3) sections switch

dimming drivers for 86Vac-265Vac universal input non-isolated buck constant current LED lighting

Application. Operation in critical continuous mode, the power MOSFET switching loss is reduced and

the inductor is fully utilized. Output current does not vary with the inductance and the LED voltage,

excellent LED load regulation achieved.

The SIC9952/9953/9954 are four(4) sections dimming, the first switch on power output current 100%,

the second switch output current then becomes 50%, and the third switch output current becomes 25%,

the fourth switch then becomes 12.5%. The SIC9952B/9953B/9954B are three(3) sections dimming

respectively 100%, 50%, 12.5%. If the power off time is more than 5 seconds, the system will be rest,

and then the stage will go the first stage.

The SIC9952(B)/9953(B)/9954(B) integrates 500V power MOSFET. It doesn’t need the auxiliary

winding for sensing and supplying the chip. With very few external components, the system cost

and size are minimized.The SIC9952(B)/9953(B)/9954(B) with multiple protection features, including

LED short/open circuit protection, CS resistor short circuit protection, Vcc under voltage protection,

chip overheating regulation.

The SIC9952(B)/9953(B)/9954(B) are available in SOP-8/DIP-7 package.

Features

· 4 or 3 sections switch dimming

· Integrated 500V power transistor

· No auxiliary winding

· LED open circuit protection

· LED short-circuit protection

· Current Sense resistor short circuit protection

· VCC Over-voltage and Under-voltage Protection

· Over Temperature Protection

· Ultra-low operating current

· Universal Input Voltage

Typical Application

Si semiconductors

SIC9952(B)/9953(B)/9954(B)_EN_Rev2.0

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12 3 4 5 6 7...11

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