WS3440 datasheet(1/8 Pages) WINSEMI

tên linh kiện	WS3440

Giải thích chi tiết về linh kiện	Constant Current Controller For Non-isolated Buck LED Driver

PDF	8 Pages

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nhà sản xuất	WINSEMI [Shenzhen Winsemi Microelectronics Co., Ltd]

Trang chủ	http://www.winsemi.com

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W/T-Y027-Rev.A/1 May.2014

WS3440 Product Description

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

0813

Features

�

Inductor

Current

Critical

Mode,

No

Need

to

Compensate the Inductance Variation

�

Source Driver Structure, Not Need the Auxiliary

Winding for VCC

�

±3% LED Current Accuracy

�

Up to 93% System Efficiency

�

LED Short Circuit Protection

�

Current Sense Resistor Short Circuit Protection

�

Over Temperature Protection

�

Programmable LED open protection

Applications

�

LED Bulb

�

LED Candle light

�

LED Spot light

�

Decorative LED lighting

General

General Description

Description

The WS3440 is a high precision constant current controller，

designed for non-isolated buck LED driver. suitable for AC

input voltage range (84V-264V)

The WS3440 uses high precision current sense circuit and

patent method for constant current control, to achieve high

precision output current and excellent line regulation. The

WS3440 operates in inductor current critical mode. The LED

current is constant over wide range of inductance variation

and the LED output voltage, so the load regulation is

excellent.

The WS3440 uses patent source driver architecture. The

operation current is 200uA only, so the auxiliary winding is not

needed. It can simplify the system design and reduce the

system cost.

The WS3440 offers rich protection functions, including LED

open/short circuit protection, current sense resistor short

circuit protection and over temperature protection.

Typical

Typical Application

Application

Application Circuit

Circuit

Constant

Constant Current

Current

Current Controller

Controller

Controller For

For

For Non-isolated

Non-isolated

Non-isolated Buck

Buck

Buck LED

LED

LED Driver

Driver

A C

1

2

3

6

5

4

R O V P G N D

C S

V C C

G A T E

S

Số phần tương tự - WS3440

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WS3440 bảng dữ liệu(PDF) 1 Page - Shenzhen Winsemi Microelectronics Co., Ltd

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Số phần tương tự - WS3440

Mô tả tương tự - WS3440

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