MT7223 datasheet(1/1 Pages) MAXIC

tên linh kiện	MT7223

Giải thích chi tiết về linh kiện	Step-down constant current LED driver with internal MOS switch

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nhà sản xuất	MAXIC [Maxic Technology Corporation]

Trang chủ	http://www.maxictech.com/

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MT7223

Step-down constant current LED driver

Maximizing IC Performance

with internal MOS switch

Email: sales@maxictech.com

www.maxictech.com

Rev. 1.05

Tel: 86-10-62662828

Page 1

DESCRIPTION

MT7223 is a high efficiency and high precision

step-down constant current LED driver with an

integrated 90V MOS switch.

MT7223 uses fixed-off-time peak current control

scheme, the off-time can be adjusted by

changing the external capacitor, and the

operation frequency also can be adjusted

according to the need of customer.

MT7223 regulates the current flowing through

LEDs to set the luminance of LEDs by changing

the external current sense resistor, on the other

hand, the luminance of LEDs also can be

regulated by a PWM signal applied to DIM pin.

DIM pin can also achieve linear dimming.

MT7223 integrates VDD Zener Diode and over

temperature protection, etc. to reduce the

peripheral components and improve the system

reliability

.

Typical Application Circuit

FEATURES



Wide input voltage range: 3.1V~90V



Internal 90V MOS switch



Supports PWM dimming and linear dimming



Built-in VIN line compensation



High efficiency (up to 93%)



Up to 1MHz switching frequency



CS voltage: 250mV



UVLO voltage: 2.6V



Intelligent over temperature protection



OFF-time programmable



Internal VDD Zener Diode



Available in ESOP8 packages, the bottom

plane is connected to SW pin

APPLICATION



Bicycle, electric bicycle, motorcycle light



Strong light flashlight



Spotlighting



High power LED lighting



LED back-up lighting

ABSOLUTE MAXIMUM RATINGS

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