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MP3397 Datasheet(PDF) 7 Page - Monolithic Power Systems

Part # MP3397
Description  Step-Up, 4-String Max 350mA/String White LED Driver
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP3397 Datasheet(HTML) 7 Page - Monolithic Power Systems

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MP3397—4-STRING, MAX 350mA/STRING WHITE LED DRIVER
MP3397 Rev. 1.01
www.MonolithicPower.com
7
9/4/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
VIN =12V, 10 LEDs in series, 4 strings in parallel, 220mA/string, unless otherwise noted.
VSW
20V/div.
VCOMP
1V/div.
VOUT
20V/div.
ILED
2A/div.
Steady State
VSW
20V/div.
VOUT
20V/div.
VIN
10V/div.
ILED
500mA/div.
Vin Startup
VSW
20V/div.
VOUT
20V/div.
VEN
5V/div.
ILED
500mA/div.
Ven Startup
VSW
20V/div.
VBOSC
1V/div.
VOUT
20V/div.
ILED
1A/div.
DC Burst Dimming
VPWM = 0.9V, CBOSC = 2.2nF
VSW
20V/div.
VOUT
20V/div.
VPWM
5V/div.
ILED
1A/div.
External PWM Dimming
fPWM = 200Hz, DPWM = 50%
VSW
20V/div.
VOUT
20V/div.
ILED
1A/div.
Open LED Protection
Open all LED strings at working
VSW
20V/div.
VOUT
20V/div.
ILED
1A/div.
Open LED Protection
Open one LED string at working
VSW
20V/div.
VOUT
20V/div.
VLED1
20V/div.
ILED
1A/div.
Short LED Protection
Short a string at working
Efficiency vs. Vin
INPUT VOLTAGE (V)
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
94.0%
96.0%
98.0%
100.0%
10 12 14 16 18 20 22 24 26


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