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MP2481 Datasheet(PDF) 5 Page - Monolithic Power Systems

Part # MP2481
Description  36V, 1.2A, 1.4MHz White LED Driver
PDF  12 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2481 Datasheet(HTML) 5 Page - Monolithic Power Systems

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MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER
MP2481 Rev. 1.42
www.MonolithicPower.com
5
4/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=12V, ILED=1A, one 5W WLED, Step-down application (refer to Figure 3), unless otherwise
noted.
Steady State Operation
Short Circuit Protection
PWM Dimming
Open Load Protection
PWM Dimming Duty
Short LED+ to INGND
fPWM=1kHz,DPWM=50%
fPWM=1kHz
VSW
10V/div.
VPWM
5V/div.
VOUT
2V/div.
VOUT
2V/div.
VSW
10V/div.
VSW
10V/div.
VFB
200mV/div.
IINDUCTOR
500mA/div.
ILED
500mA/div.
ILED
1A/div.
VOUT
AC Coupled
200mV/div.
4
400ns/div
4
2
VSW
10V/div.
IINDUCTOR
500mA/div.
Efficiency vs.
Input Voltage
LED Current vs.
Analog Dimming Voltage
LED Current vs.
PWM Dimming Duty
60
0
0.4
0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.2
0.4
0.6
0.8
1.0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.6 0.8 1.0 1.2 1.4 1.6 1.8
10
20
30
40
65
70
75
80
85
90
95
100
INPUT VOLTAGE (V)
ANALOG DIMMING VOLTAGE (V)
3 WLEDs in series,500mA
2 WLEDs in series,500mA
1 WLED,1A
1 WLED,500mA



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