MP3302DD-LF-Z

MP3302
40V, 1.3A, Single-cell Step-up
White LED Driver
with Single Wire Dimming Control
MP3302 Rev. 0.98 www.MonolithicPower.com 1
5/5/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3302 is a step-up converter designed for
driving arrays of WLEDS from a single cell
Lithium Ion battery. The MP3302 uses current
mode, fixed frequency 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 MP3302 is turned off if
an over-voltage condition is present due to an
open circuit condition.
The MP3302 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload.
The MP3302 is available in small 5-pin TSOT23
and 8-pin QFN (2mm x 3mm) packages.
FEATURES
Internal Power MOSFET
Drives up to 10 Series White LEDs
Up to 87% Efficiency
Single Wire Dimming Control
1.3MHz Fixed Switching Frequency
Open Load Shutdown
Low 200mV Feedback Voltage
UVLO, Thermal Shutdown
Internal 1.3A Current Limit
Available in TSOT23-5 and 2mm x 3mm
QFN8 Packages
APPLICATIONS
5” ~ 7” LCD Panels
Handheld Computers and PDAs
Digital Still Cameras
Small LCD Displays
“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC Technology
are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP3302
V
IN
3.3V - 6V
Enable/
Dimming
Control
LED1
LED2
LED3
LED25
LED26
LED27
IN
EN
GND FB
SW
String 1 String 9...
EFFICIENCY (%)
3
60
65
70
75
80
85
90
95
4
56
INPUT VOLTAGE(V)
3 WLEDs,9 Strings
Efficiency vs
Input Voltage
MP3302 –40V, 1.3A, SINGLE-CELL STEP-UP WHITE LED DRIVER WITH SINGLE WIRE DIMMING CONTROL
MP3302 Rev. 0.98 www.MonolithicPower.com 2
5/5/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number Package Top Marking Free Air Temperature (T
A
)
MP3302DJ* TSOT23-5 N6
–40°C to +85°C
MP3302DD** QFN8 (2mm x 3mm) N7
–40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP3302DJ–Z);
For RoHS Compliant Packaging, add suffix –LF (e.g. MP3302DJ–LF–Z).
** For Tape & Reel, add suffix –Z (e.g. MP3302DD–Z);
For RoHS Compliant Packaging, add suffix –LF (e.g. MP3302DD–LF–Z)
PACKAGE REFERENCE
TOP VIEW
GND
IN
NC
EN
1
2
3
4
SW
NC
FB
GND
8
7
6
5
Exposed Pad
Connect to GND
TSOT23-5 QFN8 (2mm x 3mm)
ABSOLUTE MAXIMUM RATINGS
(1)
SW Pin.........................................–0.5V to +44V
All Other Pins..............................–0.3V to +6.5V
Continuous Power Dissipation…(T
A
= +25°C)
(2)
TSOT23-5 ................................................ 0.57W
QFN8 (2mm x 3mm) ................................ 1.56W
Storage Temperature.............. –55°C to +150°C
Recommended Operating Conditions
(3)
IN Supply Voltage ..............................2.5V 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
TSOT23-5.............................. 220 .... 110.. °C/W
QFN8 (2mm x 3mm)............... 80 ...... 16... °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
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
)/
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 approximately 1” square of 1 oz copper.
SW
GND
FB
1
2
3
5
4
IN
EN
TOP VIEW
MP3302 –40V, 1.3A, SINGLE-CELL STEP-UP WHITE LED DRIVER WITH SINGLE WIRE DIMMING CONTROL
MP3302 Rev. 0.98 www.MonolithicPower.com 3
5/5/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 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) V
EN
= 0V 4 8 µA
Supply Current (Quiescent) V
FB
= 0.15V 690 850 µA
Switching Frequency f
SW
1.0 1.3 1.5 MHz
Maximum Duty Cycle V
FB
= 0V 92 %
Under Voltage Lockout
IN Under Voltage Lockout UVLO V
IN
Rising 2.25 2.45 V
Under Voltage Lockout
Hysteresis
92 mV
Open Lamp Shutdown
Threshold
V
OV
V
OV
Rising 40 42 44 V
Enable
EN OFF Threshold V
EN
Falling 0.4 V
EN ON Threshold V
EN
Rising 0.6 V
Minimum EN Dimming
Threshold
V
FB
= 0V 0.655 0.7 0.845 V
Maximum EN Dimming
Threshold
V
FB
= 0.2V 1.275 1.4 1.425 V
Feedback
FB Voltage V
EN
= 1.5V 185 200 215 mV
FB Input Bias Current V
FB
= 0.1V -600 -300 nA
Output Switch
SW On-Resistance
(5)
R
ON
0.5
SW Current Limit
(5)
Duty Cycle = 60% 1.33 A
Thermal Shutdown
(5)
150
°C
Notes:
5) Guaranteed by design.

MP3302DD-LF-Z

Mfr. #:
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 1.3A, 1.3MHz WLED Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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