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MP3305DD-LF-Z

P1-P3P4-P6P7-P9P10-P11
MP3305
36V, 1.3A, Step-up
White LED Driver
with High Frequency True PWM Dimming & Adjust OVP
MP3305 Rev. 1.0 www.MonolithicPower.com 1
4/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3305 is a monolithic step-up converter
designed for driving arrays of WLEDs from 5V
input or a single cell Lithium Ion battery. The
MP3305 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 MP3305 features up to 50kHz true PWM
dimming, which allows the flexible control of the
backlighting luminance under wide range of the
ambient brightness, and also avoids the
possibility of PWM dimming audible noise.
The MP3305 is turned off if an over-voltage
condition is present due to an open circuit
condition. Use one external resistor voltage
divider to adjust OVP threshold. MP3305 also
includes under-voltage lockout, current limiting
and thermal overload protection preventing
damage in the event of an output overload.
The MP3305 is available in small 8-pin QFN
2x3mm package.
FEATURES
• Internal Power MOSFET
• Drives up to 10 Series White LEDs
• Up to 88% Efficiency
• PWM Dimming Frequency from 250Hz to
50kHz
• 2.2MHz Fixed Switching Frequency
• Adjustable Open Load Shutdown Threshold
(OVP)
• Low 200mV Feedback Voltage
• UVLO, Thermal Shutdown
• Internal 1.3A Current Limit
• Available in 2mm x 3mm QFN8 Package
APPLICATIONS
• LCD Panels
• Digital Picture Frames
• Handheld Computers and PDAs
• Digital Still Cameras
• Small LCD Displays
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “Monolithic Powe
r
Systems”, “MPS”, and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP3305
V
IN
5V
Enable/
Dimming
Control
LED1
LED2
LED3
R2 R1
R
SET
L
D
C1
C2
LED28
LED29
LED30
IN
EN
GND
LED
ISETOVP
SW
String 1 String 10...
V
IN
vs. Efficiency
50
60
70
80
90
100
3 3.5 4 4.5 5 5.5 6 6.5
V
IN
(V)
EFFICIENCY (%)
MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP
MP3305 Rev. 1.0 www.MonolithicPower.com 2
4/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T
A
)
MP3305DD
QFN8 (2mm x 3mm)
6E
-40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP3305DD–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP3305DD–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)
………………………………………………....1.9W
Recommended Operating Conditions
(3)
IN Supply Voltage .................................3V to 6V
SW Pin................................................V
IN
to 36V
Operating Junct. Temp (T
J
)...... -40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN8 (2mm x 3mm) ...............65 ...... 13... °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.
TOP VIEW
SW
PGND
VIN
OVP
1
2
3
4
GND
ISET
LED
EN
8
7
6
5
Exposed Pad
Connect to GND
MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP
MP3305 Rev. 1.0 www.MonolithicPower.com 3
4/10/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 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 1 2 µA
Supply Current (Quiescent) I
IN_QS
V
ISET
= 0.3V 690 850 µA
Switching Frequency F
SW
1.7 2.2 2.7 MHz
Maximum Duty Cycle D
MAX
V
ISET
= 0V 90 %
Under Voltage Lockout
IN Under Voltage Lockout V
UVLO
V
IN
Rising 2.25 2.45 V
Under Voltage Lockout
Hysteresis
92 mV
Open Lamp Shutdown
Threshold
V
OVP
V
OV
Rising 0.9 V
Enable
EN OFF Threshold V
EN_LOW
V
EN
Falling 0.4 V
EN ON Threshold V
EN_HIGH
V
EN
Rising 1.8 V
Disable Timer 5 ms
Minimum EN ON Pulse 5 µs
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 (M2, refer block
diagram) On Resistance
0.8 Ω
P1-P3P4-P6P7-P9P10-P11

MP3305DD-LF-Z

Mfr. #:
Buy MP3305DD-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 36V WLED Driver with OVP
Lifecycle:
New from this manufacturer.
Delivery:
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