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PDF MP3412 Data sheet ( Hoja de datos )
| Número de pieza | MP3412 | |
| Descripción | 1MHz Synchronous Boost | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MP3412 is a synchronous, fixed frequency,
high efficiency step-up WLED driver with true
output load disconnect function in a low profile
6-lead Thin-SOT23 package.
The MP3412 can startup from an input voltage as
low as 0.8V and provides in-rush current limiting
as well as output short circuit protection. The
open load protection is also integrated
A switching frequency of 1MHz minimizes overall
solution footprint by allowing the use of tiny, low
profile inductors and ceramic capacitors. Current
mode PWM control with internal compensation
reduces external parts, thereby saving critical
board space.
The device also features low shutdown current of
under 1µA. The true output disconnect feature
allows the output to be completely discharged in
shutdown. It also limits the inrush of current
during start-up, minimizing surge current seen by
the input supply.
The MP3412 is available in 6-pin thin SOT23
package.
MP3412
1.1A, 1MHz Synchronous Boost
WLED Driver with Output Disconnect
FEATURES
• Input Range: 0.8V to 4.4V
• Output Range: 2.5V to 5.0V
• 0.8V Low Start-Up Voltage
• Internal Power MOSFET and Synchronous
Rectifier
• 1MHz Fixed Switching Frequency
• Current Mode Control with Internal
Compensation
• Up to 96% Efficiency
• <1µA Shutdown Current
• Tiny External Components
• True Output Load Disconnect
• Inrush Current Limiting and Internal Soft-
Start
• Open-Load Protection
• Short-Circuit Protection
• Available in TSOT23-6 Package
APPLICATION
• General LED Illuminations
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Wireless Handsets
• GPS Receivers
“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Efficiency
100
95
90 Boost Mode
85
80
75
70 Io=200mA
65 Io=80mA
60
55
50
0123
VIN(V)
LDO Mode
45
MP3412 Rev. 0.9
1/19/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
Free Datasheet http://www.datasheet4u.com/
1 page  
MP3412 - 1.1A, 1MHz SYNCHRONOUS BOOST WLED DRIVER WITH OUTPUT DISCONNECT
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = VEN = 1.8V, ILED = 200mA, One WLED, unless otherwise noted.
VIN vs. Efficiency
100
95
90 Boost Mode
85
80
75
70 Io=200mA
65 Io=80mA
60
55
50
0123
VIN(V)
LDO Mode
45
PWM Dimming Duty vs.
WLED Current
250 fPWM=200Hz
200
150
100
50
0
0 20 40 60 80 100
PWM DIMMING DUTY (%)
Steady State (Boost Mode)
VIN=VEN=0.8V, ILED=80mA
Steady State (Boost Mode)
VIN=VEN=1.8V, ILED=200mA
Steady State (LDO Mode)
VIN=VEN=4.4V, ILED=200mA
VSW
2V/div.
VOUT/AC
100mV/div.
VFB
50mV/div.
IINDUCTOR
200mA/div.
1us/div.
VSW
2V/div.
VOUT/AC
100mV/div.
VFB
50mV/div.
IINDUCTOR
200mA/div.
1us/div.
VSW
2V/div.
VOUT/AC
50mV/div.
VFB
II5N0DmUVC/TdOivR.
100mA/div.
1us/div.
Enable Startup
VIN=VEN=0.8V, ILED=80mA
Enable Startup
VIN=VEN=1.8V, ILED=200mA
Enable Shutdown
VIN=VEN=1.8V, ILED=200mA
VSW
2V/div.
VEN
1V/div.
VOUT
2V/div.
ILED
50mA/div.
100us/div.
VSW
2V/div.
VEN
2V/div.
VOUT
2V/div.
ILED
100mA/div.
40us/div.
VSW
2V/div.
VEN
2V/div.
VOUT
2V/div.
ILED
100mA/div.
20us/div.
MP3412 Rev. 0.9
1/19/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
MP3412 - 1.1A, 1MHz SYNCHRONOUS BOOST WLED DRIVER WITH OUTPUT DISCONNECT
TYPICAL APPLICATION CIRCUIT
Figure 2—Step-up White LED Driver Application
MP3412 Rev. 0.9
1/19/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MP3412.PDF ] | |
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