Datasheet > WS3442D7P

WS3442D7P

更新时间： 2024-11-25 01:13:47

品牌	Logo	应用领域
稳先微 - WINSEMI		/
页数	文件大小	规格书
10页	610K
描述
Non-isolated Buck Offline LED Driver

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WS3442D7P 数据手册

WS3442 ProductDescription

Non-isolated Buck Offline LED Driver

Features

Description



Critical Conduction Mode Operation

Internal 500V Power MOSFET

No Auxiliary Winding

The WS3442 is a high precision buck constant current

LED driver. The device operates in critical conduction mode

and is suitable for 85Vac~265Vac universal input offline LED

lighting.

Ultra Low Operating Current

±3% LED Output Current Accuracy

Efficiency up to 93%

The WS3442 integrates a 500V power MOSFET. The

operating current of the IC is very low. So it doesn’t need the

auxiliary winding for supplying the chip. It can achieve

excellent constant current performance with very few external

components, so the system cost and size are minimized.

The WS3442 utilizes patent pending current control

method. It can achieve precise output current and excellent

line regulation. The driver operates in critical conduction

mode, the output current does not change with the inductance

and LED output voltage.

LED Open Protection

LED Short Protection

Current Sensing Resistor Short Protection

Thermal Regulation Function

Available in SOP-8 Package and DIP-7 Package

Applications



LED Candle Light

The WS3442 offers rich protection functions to improve

the system reliability, including LED open circuit protection,

LED short circuit protection, VCC under voltage protection,

CS resistor short circuit protection and thermal regulation

function.

LED Bulb, Spot Light

T8/T10 LED String

Other LED Lighting

The WS3442 is available in SOP-8 Package and DIP-7

Package.

Typical Application(SOP-8 Package)

Attention：A 22pF capacitor can be parallel with Rovp and a resistor can be parallel with the Vcc capacitor.

WINSEMI MICROELECTRONICS

1105

12 3 4 5 6 7...10

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