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PDF MP3310 Data sheet ( Hoja de datos )
| Número de pieza | MP3310 | |
| Descripción | Step-up White LED Driver | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MP3310 is a monolithic step-up converter
designed for driving arrays of WLEDs from a
wide input supply range. The MP3310 uses
current mode, fixed frequency architecture to
regulate the LED current to user programmed
value set by an external current setting resistor.
The switching frequency is also programmable
with an external resistor.
The MP3310 features true PWM dimming,
which allows the flexible control of the
backlighting luminance under wide range of the
ambient brightness.
The MP3310 is turned off if an over-voltage
condition is present due to an open circuit
condition. Use one external resistor voltage
divider to program OVP threshold. The MP3310
also includes under-voltage lockout, current
limiting and thermal overload protection
preventing damage in the event of an output
overload.
The MP3310 is available in small 10-pin QFN
3x3mm package.
TYPICAL APPLICATION
MP3310
50V, 1.3A, Step-up
White LED Driver
with True PWM Dimming
FEATURES
• Internal 0.3Ω Power MOSFET
• Wide 4.5V to 25V Operating Input Range
• Drives up to 12 Series White LEDs
• Up to 93% Efficiency
• True PWM Dimming
• Adjustable Switching Frequency
• Adjustable Open Load Shutdown Voltage
• Internal 1.3A Current Limit
• UVLO, Thermal Shutdown
• Available in 3mm x 3mm QFN10 Package
APPLICATIONS
• LCD Panels
• Digital Picture Frames
• Handheld Computers and PDAs
• Digital Still Cameras
• Small LCD Displays
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
VIN vs. Efficiency
100
95
90
85
80
75
70
4 8 12 16 20 24
VIN(V)
MP3310 Rev.1.0
7/5/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
1 page  
MP3310—50V, 1.3A, STEP-UP WHITE LED DRIVER WITH TRUE PWM DIMMING
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, VEN = 5V, ILED = 80mA, 10WLEDs 4Strings, unless otherwise noted.
VIN vs. Efficiency
100
95
90
85
80
75
70
4 8 12 16 20 24
VIN(V)
PWM Dimming Duty vs.
WLED Current
90
80
70
60
50
40
30 200Hz
20 2kHz
10
0
0 10 20 30 40 50 60 70 80 90100
PWM DIMMING DUTY (%)
RFSET vs. fSW
1300
1200
1100
1000
900
800
700
600
500
400
300
200
0
20 40 60 80 100 120
Steady State
Enable Startup
Enable Shutdown
20VV/dSiWv.
20V0OmUVT//dAiCv.
500mVVI/EdSivT.
IINDUCTOR
200mA/div.
1usdiv.
20VV/dSiWv.
5VV/dEivN.
500mVCVM/dOivP.
ILED
50mA/div.
4msdiv.
20VV/dSiWv.
5VV/dEivN.
ILED
50mA/div.
10VVO/dUivT.
20usdiv.
PWM Dimming
fPWM=200Hz, DPWM=50%
20VV/dSiWv.
PWM
2V/div.
ILED
50mA/div.
10VVO/dUivT.
2msdiv.
PWM Dimming
fPWM=2kHz, DPWM=50%
20VV/dSiWv.
PWM
2V/div.
ILED
50mA/div.
10VVO/dUivT.
200usdiv.
Open Load Protection
20VV/dSiWv.
10VVO/dUivT.
ILED
50mA/div.
40usdiv.
MP3310 Rev.1.0
7/5/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MP3310.PDF ] | |
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