MP3202DG-LF-P

MP3202
1.3A Fixed Frequency
White LED Driver
MP3202 Rev. 0.91 www.MonolithicPower.com 1
9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3202 is a step-up converter designed for
driving up to 39 white LEDs (13 strings of 3 LEDs
each) from a 5V system rail. The MP3202 uses a
current mode, fixed frequency architecture to
regulate the LED current, which is measured
through an external current sense resistor. Its low
104mV feedback voltage reduces power loss and
improves efficiency. The OV pin monitors the
output voltage and turns off the converter if an
over-voltage condition is present due to an open
circuit condition.
The MP3202 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload.
The MP3202 is available in small 6-pin TSOT23
or 8-pin QFN (2mm x 2mm) packages.
FEATURES
2.5V to 6V Input Voltage Range
On Board Power MOSFET
Drives up to 39 White LEDs at 5V Input
Up to 92% Efficiency
Over 1MHz Fixed Switching Frequency
Open Load Shutdown
Low 104mV Feedback Voltage
Soft-Start/PWM Dimming
UVLO, Thermal Shutdown
Internal 1.3A Current Limit
Available in TSOT23-6 and QFN8 Packages
APPLICATIONS
Cell Phones
Handheld Computers and PDAs
Digital Still Cameras
Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP3202
V
IN
4.5V - 6V
EN
13 Strings
IN
EN
GND
OV
FB
SW
100
90
80
70
60
50
EFFICIENCY (%)
4.0 4.5 5.0 5.5 6.0
INPUT VOLTAGE (V)
Efficiency vs
Input Voltage
I
OUT
=180mA
I
OUT
=100mA
MP3202 – 1.3A FIXED FREQUENCY WHITE LED DRIVER
MP3202 Rev. 0.91 www.MonolithicPower.com 2
9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
PACKAGE REFERENCE
Part Number* Package Temperature
MP3202DJ TSOT23-6
–40°C to +85°C
*
For Tape & Reel, add suffix –Z (eg. MP3202DJ–Z)
For RoHS compliant packaging, add suffix –LF
(eg. MP3202DJ–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
SW Pin......................................–0.5V to +28.5V
All Other Pins..............................–0.3V to +6.5V
Storage Temperature.............. –55°C to +150°C
Recommended Operating Conditions
(2)
IN Supply Voltage ..............................2.5V to 6V
Output Voltage....................................V
IN
to 25V
Operating Temperature............. –40°C to +85°C
Part Number** Package Temperature
MP3202DG
QFN8
(2mm x 2mm)
–40°C to +85°C
**
For Tape & Reel, add suffix –Z (eg. MP3202DG–Z)
For RoHS compliant packaging, add suffix –LF
(eg. MP3202DG–LF–Z)
Thermal Resistance
(3)
θ
JA
θ
JC
TSOT23-6.............................. 220 .... 110.. °C/W
QFN8 (2mm x 2mm)............... 80 ...... 16... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
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 0.1 1 µA
Supply Current (Quiescent) V
FB
= 0.15V 690 750 µA
Switching Frequency f
SW
1.0 1.3 1.5 MHz
Maximum Duty Cycle V
FB
= 0V 85 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 28 V
SW
GND
FB
1
2
3
6
5
4
IN
OV
EN
TOP VIEW
TOP VIEW
GND
IN
OV
EN
1
2
3
4
SW
NC
FB
GND
8
7
6
5
MP3202 – 1.3A FIXED FREQUENCY WHITE LED DRIVER
MP3202 Rev. 0.91 www.MonolithicPower.com 3
9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Enable
EN Threshold V
EN
Rising, V
IN
= 5V 1.0 1.35 1.6 V
EN Threshold V
EN
Rising, V
IN
= 2.5V 0.8 V
EN Hysteresis 90 mV
EN Input Bias Current V
EN
= 0V, 5V 1 µA
Feedback
FB Voltage
94 104 114 mV
FB Input Bias Current V
FB
= 0.1V –600 –300 nA
Output Switch
SW On-Resistance
(4)
R
ON
0.5
SW Current Limit
(4)
Duty Cycle = 60% 1.33 A
Thermal Shutdown
(4)
160
°C
Notes:
4) Guaranteed by design.
PIN FUNCTIONS
TSOT23-6
Pin #
QFN8
Pin #
Name Description
1 8 SW
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect
the power inductor and output rectifier to SW. SW can swing between GND and
25V.
2 1, 5 GND Ground.
3 6 FB
Feedback Input. The MP3202 regulates the voltage across the current sense
resistor between FB and GND. Connect a current sense resistor from the bottom
of the LED string to GND. Connect the bottom of the LED string to FB. The
regulation voltage is 104mV.
4 4 EN
Regulator On/Off Control Input. A high input at EN turns on the converter, and a
low input turns it off. When not used, connect EN to the input source for automatic
startup. The EN pin cannot be left floating.
5 3 OV
Over Voltage Input. OV measures the output voltage for open circuit protection.
Connect OV to the output at the top of the LED string.
6 2 IN Input Supply Pin. Must be locally bypassed.
7 NC No Connect.

MP3202DG-LF-P

Mfr. #:
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 39 WLED, 1.3MHz Boost Driver
Lifecycle:
New from this manufacturer.
Delivery:
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