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MT7004B

APPLICATION
Small LCD Panels
Digital Picture Frames
Handheld Computers and PDAs
Digital Still Cameras
Small LCD Displays

Product

Description

Vin(V)

Max drive capacity

PFC

Dimming

Package

PDF

MT7004B

Boost

2.7V~6V

5W

-

PWM,Linear

SOT23-6

MT7004B

DESCRIPTION
The MT7004B is a Boost LED driver for driving up to 39 LEDs (3-series and 13-parallel) from a 5V system rail. The MT7004B uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 110mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition. The MT7004B includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload.

FEATURES
2.7V to 6V input voltage range
Boost PWM with internal power MOSFET
Drives up to 39 LEDs at 5V input.
Up 90% Efficiency
Low feedback voltage: 110mV
PWM dimming frequency from 100Hz to 200kHz
Under-Voltage lockout (UVLO) protection
Internal thermal protection and Open Load Shutdown Threshold(OVP)
Fixed switching frequency: 1.3MHz
1uA shutdown current
Internal soft-start
Available in SOT23-6 package

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