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MP3308DL-LF-P

P1-P3P4-P6P7-P9P10-P12P13-P13
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
V
IN
MP3308
ISET
LED
EN
PWMOA
GND
PWMIA
OVP
Enable
LD
C
IN
RISET
CF SET
IN
COU T
COA
SW
ROVP 1
ROVP2
PWMIB
PWMOB
FSET
COB
V
OUT
MP3308 – STEP-UP WHITE LED DRIVER WITH DUAL PWM DIMMING INPUT CONTROL
MP3308 Rev. 1.02 www.MonolithicPower.com 2
7/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP3308DL QFN14 (3x4mm) 3308
For Tape & Reel, add suffix –Z (e.g. MP3308DL-Z).
For RoHS, compliant packaging, add suffix –LF (e.g. MP3308DL–LF–Z).
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
SW Pin, LED Pin...........................-0.5V to +40V
All Other Pins...............................-0.3V to +6.5V
Storage Temperature............... -55°C to +150°C
Continuous Power Dissipation (T
A
= 25°C)
(2)
………………………………………………....2.6W
Recommended Operating Conditions
(3)
Supply Voltage (V
IN
)..............................3V to 6V
SW Pin................................................V
IN
to 36V
Operating Junction Temp. (T
J
). -40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN14 (3x4mm) .....................48 ...... 10 ... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX) = (T
J
(MAX)-T
A
)/θ
JA
. Exceeding the maximum allowable powe
r
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
PIN 1 ID
14
13
12
11
10
9
8
1
2
3
4
5
6
7
TOP VIEW
EXPOSED PAD
ON BACKSIDE
CONNECT TO GND
QFN14 (3x4mm)
MP3308 – STEP-UP WHITE LED DRIVER WITH DUAL PWM DIMMING INPUT CONTROL
MP3308 Rev. 1.02 www.MonolithicPower.com 3
7/19/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= V
EN
= 5V, T
A
= 25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Operating Input Voltage V
IN
2.5 6 V
Supply Current (Shutdown) I
IN_SD
V
EN
= 0V 25 30 µA
Supply Current (Quiescent) I
IN_QS
V
ISET
= 0.3V 860 µA
Switching Frequency f
SW
1.7 2.2 2.7 MHz
Maximum Duty Cycle D
MAX
V
ISET
= 0V 90 %
Under Voltage Lockout
V
IN
Under Voltage Lockout V
UVLO
V
IN
Rising 2.1 2.3 V
Under Voltage Lockout Hysteresis 30 mV
Over-Voltage Protection Threshold V
OVP
V
OUT
Rising 0.9 V
Enable and Dimming
EN/PWMIX OFF Threshold V
LOGIC_LOW
V
EN
Falling 0.4 V
EN/PWMIX ON Threshold V
LOGIC_HIGH
V
EN
Rising 1.8 V
True PWM Dimming Duty Accuracy ∆D
DPWM
D_PWMIA=D_PWMIB=70% ±3 %
Feedback
ISET Voltage V
ISET
V
EN
> 2V 185 200 215 mV
ISET Input Bias Current V
ISET
= 0.2V -600 -300 nA
Output Switch
SW On-Resistance R
ON
0.4 Ω
SW Current Limit Duty Cycle = 60% 1.33 A
Thermal Shutdown 150 °C
LED Switch ON-Resistance (M2 in
the functional block diagram)
0.8 Ω
P1-P3P4-P6P7-P9P10-P12P13-P13

MP3308DL-LF-P

Mfr. #:
Buy MP3308DL-LF-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers Step-up White LED Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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