MT7201C datasheet(1/1 Pages) MAXIC

Il numero della parte	MT7201C

Spiegazioni elettronici	1A LED driver with internal switch

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Produttore elettronici	MAXIC [Maxic Technology Corporation]

Homepage	http://www.maxictech.com/

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MT7201C

1A LED driver with internal switch

Email: sales@maxictech.com

www.maxictech.com

Rev. 3.75

Tel: 86-10-62662828

Page 1

DESCRIPTION

The MT7201C 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 LED voltage. The device operates from an

input supply between 6V~40V and provides an

externally adjustable output current of up to

1A.

The MT7201C includes the output switch and

a high-side output current sensing circuit,

which uses an external resistor to set the

nominal average output current.

Output current can be adjusted below the set

value, by applying an external control signal to

the 'ADJ' pin.

The ADJ pin will accept either a DC voltage or

a PWM waveform. Depending upon the control

frequency, this will provide either a continuous

or a gated output current. The PWM filter

components are contained within the chip.

The PWM filter provides a soft-start feature by

controlling the rise of input/output current. The

soft-start time can be increased using an

external capacitor from the ADJ pin to ground.

Applying a voltage of 0.2V or lower to the ADJ

pin turns the output off and switches the

device into a low current standby state.

The device is assembled in a SOT89-5 pin

package.

FEATURES



Simple low parts count



1A output current



Single pin on/off and brightness control

using DC voltage or PWM



Internal PWM filter



Unique frequency Jitter technique to

reduce EMI



High efficiency (up to 97%)



Wide input voltage range: 6V to 40V



Output shutdown



Up to 1MHz switching frequency



Inherent open-circuit LED protection



Typical 2% output current accuracy

APPLICATION



Low voltage halogen replacement LEDs



Automotive lighting



Low voltage industrial lighting



LED back-up lighting



Illuminated signs



Stage lights

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