MP3308

Step-up White LED Driver

with Dual PWM Dimming Input Control

MP3308 Rev. 1.02

www.MonolithicPower.com

1

7/19/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3308 is a monolithic step-up converter

designed to drive arrays of white LEDs from a

3.3V input or a single-cell lithium-ion battery.

The MP3308 uses fixed-frequency current-

mode architecture to regulate the LED current,

which is measured through an external current

sense resistor. Its low 200mV feedback voltage

reduces power loss and improves efficiency.

The MP3308 features dual PWM-dimming input

control and true PWM dimming—this control

allows for a wide luminescent range that makes

the display readable under a variety of ambient

light conditions with minimal PWM dimming

noise.

The MP3308 includes over-voltage protection,

short-circuit protection, under-voltage lockout,

current limiting, and thermal overload protection.

The MP3308 is available in small 3mmx4mm

14-pin QFN package.

FEATURES

• Internal Power MOSFET

• Drives Up to 10 White LEDs in Series

• 2.2MHz Fixed Switching Frequency

• Up to 88% Efficiency

• Dual PWM-Dimming Input Control

• Internal 1.3A Current Limit

• ±3% True PWM Dimming Duty Accuracy

• Adjustable Over-Voltage Protection

Threshold

• Low 200mV Feedback Voltage

• Under-Voltage Lockout, Short-Circuit

Protection, Thermal Shutdown

• Available in 3mmx4mm QFN14 Package

APPLICATIONS

• Small LCD Panels

• Digital Picture Frames

• Smartphones

• Portable Media Players

• Digital Cameras

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP3308

ISET

LED

EN

PWMOA

GND

PWMIA

OVP

Enable

LD

IN

SW

PWMIB

PWMOB

FSET