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MP24892 Datasheet(PDF) 5 Page - Monolithic Power Systems

Part # MP24892
Description  Step Down White LED Driver with Wide 6V??5V Input Voltage
PDF  9 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP24892 Datasheet(HTML) 5 Page - Monolithic Power Systems

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MP24892 – STEP DOWN WLED DRIVER WITH WIDE 6V–45V INPUT VOLTAGE
MP24892 Rev. 1.0
www.MonolithicPower.com
5
11/3/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=30V, 3 LEDS in series, IOUT=550mA, unless otherwise noted.
INPUT VOLTAGE (V)
Efficiency vs.
Input Voltage
Analog Dimming Curve
0
0.2
0.4
0.6
0.8
1
1.2
0
0.5
1
1.5
2
2.5
3
ANALOG DIM (V)
ILED vs. Rset
0
0.2
0.4
0.6
0.8
1
1.2
0.1
0.3
0.5
0.7
0.9
1.1
VSW
10V/div.
ILED
200mA/div.
Steady State
Vsw
20V/div.
VIN
20V/div.
ILED
500mA/div.
Vin Startup
VSW
20V/div.
VEN
1V/div.
EN Signal
2V/div.
ILED
500mA/div.
Ven Startup
VSW
20V/div.
PWM Signal
2V/div.
ILED
500mA/div.
PWM Dimming
fPWM = 200Hz, DPWM= 50%
VSW
20V/div.
VLED+
10V/div.
ILED
200mA/div.
Open LED Protection
Open LEDs at working
VSW
20V/div.
VLED-
10V/div.
ILED
200mA/div.
Short LED Protection
Short LEDs at working
70
75
80
85
90
95
100
10
15
20
25
30
35
40
45
FUNCTION DIAGRAM



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