MT7200 datasheet(1/1 Pages) MAXIC

Part #	MT7200

Description	Step-down High Brightness LED controller

PDF	1 Pages

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Manufacturer	MAXIC [Maxic Technology Corporation]

Direct Link	http://www.maxictech.com/

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MT7200

Step-down High Brightness LED controller

sales@maxictech.com

www.maxictech.com

Rev. 1.05

Tel: 86-10-62662828

Page 1

DESCRIPTION

MT7200 is a continuous mode inductive

step-down converter, designed for driving single

or multiple series connected LEDs efficiently

from a voltage source higher than the total LED

chain voltage. The device operates with a wide

input supply voltage up to 55V and provides an

externally adjustable output current.

MT7200 is used to drive external power

MOSFET. It sets the average output current by

the high-side output current sense circuit

.

The ADJ pin accepts either a DC voltage or a

PWM dimming signal to adjust the output LED

current. The PWM dimming frequency can be as

high as 20kHz. The soft-start time is set by

putting an external capacitor from the ADJ pin to

ground. Applying a 0.2V or lower voltage to the

ADJ pin turns the output off and switches the

device into a low current standby state.

MT7200 provides various protection features to

improve the system reliability, including over

temperature regulation (OTR), and over

temperature shutdown (OTP), LED short/open

protection, etc.

APPLICATION CIRCUIT

FEATURES



Few external components.



Single pin for ON/OFF and DC voltage or

PWM brightness control



Built-in VIN line compensation



Proprietary frequency Jitter technique to

reduce EMI



High efficiency (up to 97%)



Wide input voltage range



Adjustable constant output current



Up to 1MHz switching frequency



Over temperature regulation (OTR)



Inherent open/short-circu

it LED protection



High accuracy output current (±3%)



Available in SOT23-6 packages

APPLICATION



Low voltage halogen replacement LEDs



Automotive lighting



Low voltage industrial lighting



LED back-up lighting



Illuminated signs



Stage lights



LCD TV backlighting

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MT7200 Datasheet(PDF) 1 Page - Maxic Technology Corporation

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