MT7261 datasheet(1/1 Pages) MAXIC

部件名	MT7261

功能描述	Boost White LED Driver With High Frequency PWM Dimming

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制造商	MAXIC [Maxic Technology Corporation]

网页	http://www.maxictech.com/

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MT7261

Boost White LED Driver

Maximizing IC Performance

With High Frequency PWM Dimming

Email: sales@maxictech.com

www.maxictech.com

Rev. 1.50

Tel: 86-10-62662828

Page 1

DESCRIPTION

The MT7261 is a Boost constant current white

LED driver designed for wide input voltage

range from 2.5V to 40V system rail, drives up

to 7X1W power with AC12V/DC12V input

voltage. Current mode and fixed frequency

operation provides fast transient response and

eases loop stabilization. With a current sense

amplifier threshold of 205mV, the LED current

is programmable with one external current

sense resistor and the power loss is minimized.

The 460kHz operating frequency minimizes

external inductor, input and output capacitor.

The MT7261 supports both PWM and analog

dimming

by

a

single

control

pin.

Fault

condition protection includes over voltage

protection (OVP), cycle-by-cycle peak current

limiting and thermal shutdown.

The MT7261 is available in SOP8 packages.

FEATURES



2.5V to 40V input/output voltage range



High efficiency up to 95%



Cycle by Cycle Over Current Protection



Internal 0.2ohm power MOSFET



LED temperature protection



Stable with Low ESR Ceramic Capacitor



OTP and OVP protection



External setting over voltage protection



Fixed switching frequency: 460kHz



Frequency Jitter to lower EMI



Low feedback voltage: 205mV



Adjustable soft-start



Support one pin analog dimming and up to

50kHz PWM dimming



Available in SOP8 package

APPLICATION



Automotive and Marine Lighting



High Power LED Driver



Torch Driver



Low Voltage LED Lighting

(Landscape, Desk, Room, MR16 lighting)



LED backlighting

TYPICAL APPLICATION (STEP-UP/BOOST APPLICATION)

R1

GND

VDD

SW

DIM

COMP

OVP

CS

MT7261

VIN

10uH

VBAT

B340A

C1

10u/25V

5

Cdd

1u

6

2

4

1

7

8

3

Ccomp

22n

RISNS

1//1.3

RB1

RB2

10K

200K

C2

1u/35V

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