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MP2481 Datasheet(PDF) 3 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) 3 Page - Monolithic Power Systems

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MP2481 –36V, 1.2A, 1.4MHz WHITE LED DRIVER
MP2481 Rev. 1.42
www.MonolithicPower.com
3
4/28/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, all voltages with respect to VSS, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ
Max
Units
Feedback Voltage
VFB
4.5V
≤ VIN ≤ 36V
0.187
0.203
0.219
V
Feedback Current
IFB
VFB = 0.2V
0.2
μA
Switch-On Resistance
(5)
RDS(ON)
0.30
Ω
Switch Leakage
VEN = 0V, VSW = 0V
10
μA
Switch Current Limit
(5)
2.0
A
Oscillator Frequency
fSW
VFB = 0.1V
1.0
1.4
1.8
MHz
Fold-back Frequency
VOVP < 0.4V
120
kHz
Maximum Duty Cycle
VFB = 0.1V
89
%
Minimum On-Time
(5)
tON
100
ns
Under Voltage Lockout Threshold Rising
3.1
3.4
3.7
V
Under
Voltage
Lockout
Threshold
Hysteresis
480
mV
VEN = 2V
2.0
EN Input Current
VEN = 0V
0.1
μA
EN OFF Threshold (w/Respect to INGND)
VEN Falling
0.4
V
EN ON Threshold (w/Respect to INGND)
VEN Rising
0.7
V
Supply Current (Quiescent)
IQ
VEN = 2V, VFB = 1V
0.6
1.1
mA
Thermal Shutdown
(5)
150
°C
Open LED OV Threshold
VOVP, th
1.23
V
Open LED OV Hysteresis
VOVP, hys
0.1
V
Note:
5) Guaranteed by design.



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