MP3308DL-LF-Z Datasheet, PDF (1/13 Pages) MPS Industries, Inc. – Step-up White LED Driver with Dual PWM Dimming Input Control

The Future of Analog IC Technology
MP3308
Step-up White LED Driver
with Dual PWM Dimming Input Control
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
L
VIN
CIN
D
COUT
Enable
C C OA
OB
IN
SW
EN
PWMIA
LED
ISET
PWMIB _MP3308
PWMOA
PWMOB
FSET
GND
OVP
CFSET
RISET
ROVP1
ROVP2
VOUT
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.