MT7941 datasheet(1/1 Pages) MAXIC

tên linh kiện	MT7941

Giải thích chi tiết về linh kiện	High Precision, Dual Winding PSR AC-DC LED Driver

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nhà sản xuất	MAXIC [Maxic Technology Corporation]

Trang chủ	http://www.maxictech.com/

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MT7941

High Precision, Dual Winding PSR AC-DC LED Driver

Email: sales@maxictech.com

www.maxictech.com

Rev. 1.05

Tel: 86-10-62662828

Page 1

DESCRIPTION

MT7941 is a high precision primary-side

feedback and regulation controller for LED

lighting. It regulates precisely LED current in

isolated lighting applications. MT7941 works

under Discontinuous Conduction Mode (DCM). It

simplifies LED lighting system by eliminating the

secondary sense, the auxiliary winding and

feedback circuit. Integrated with 650V power

switch,

the

adjustable

LED

open-circuit

protection (OVP) function simplifies the system

design and improves the reliability.

With Maxic’s proprietary current regulation and

internal compensation technique, the MT7941

achieves ±3% accuracy of LED current along

with excellent line regulation and load regulation.

It is also non-sensitive to the inductance of the

transformer.

MT7941 provides various protection features to

improve the system reliability, including over

current protection (OCP), short circuit protection

(SCP), over voltage protection (OVP) and over

temperature regulation (OTR), etc.

FEATURES



Internal 650V power MOSFET



No auxiliary winding



Supporting 85V to 265V AC line voltage

range



Primary side sensing and regulation, no

secondary side feedback



High precision constant LED current (±3%)



Adjustable LED open-circuit voltage

protection threshold



LED short circuit protection



Cycle-by-cycle peak current control



VDD under voltage lock-out protection



Over temperature regulation (OTR)



Freewheeling diode Open/short-circuit

protection



Available in SOP7 package

APPLICATION



LED bulb, spotlight



LED lighting application



General purpose constant current source

Typical Application Circuit

Số phần tương tự - MT7941

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	MT7946	154Kb / 1P	High Precision, Dual Winding PSR AC-DC LED Driver

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Mô tả tương tự - MT7941

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