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MP2483 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP2483
Description  2.5A, 55V, Programmable Frequency White LED Driver
Download  14 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2483 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP2483 – 2.5A, 55V, PROGRAMABLE FREQUENCY WHITE LED DRIVER
MP2483 Rev. 1.0
www.MonolithicPower.com
3
12/25/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICES
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 ≤ 55V
0.188
0.198
0.208
V
Feedback Current
IFB
VFB = 0.22V
-50
50
nA
Switch-On Resistance
(5)
RDS(ON)
280
mΩ
Switch Leakage
VEN = 0V, VSW = 0V
1
μA
Current Limit
(5)
3.0
A
Oscillator Frequency
fSW
VFB
=
0.19V,
Rset=100kΩ
0.5
MHz
Default Oscillator Frequency
fSW_default
VFB = 0.19V, Rset
open
1.05
1.35
1.65
MHz
Fold-back Frequency
VFB = 0V, VOVP=0V
250
kHz
Maximum Duty Cycle
VFB = 0.19V
90
%
Minimum On-Time
(5)
tON
100
ns
Under Voltage Lockout Threshold Rising
3
3.3
3.6
V
Under Voltage Lockout Threshold Hysteresis
100
mV
EN Input Current
VEN = 2V
2.1
μA
EN OFF Threshold (w/Respect to INGND)
VEN Falling
0.4
V
EN ON Threshold (w/Respect to INGND)
VEN Rising
0.6
V
Minimum EN Dimming Threshold
VFB = 0V
0.6
0.7
0.8
V
Maximum EN Dimming Threshold
VFB = 0.2V
1.25
1.4
1.5
V
Supply Current (Quiescent)
IQ
VEN = 2V, VFB = 1V
0.8
1.0
mA
Supply Current (Quiescent) at EN Off
Ioff
VEN=0V
3.4
15
μA
Thermal Shutdown
(5)
150
°C
Open LED OV Threshold
VOVP_ th
1.1
1.2
1.3
V
Open LED OV Hysteresis
VOVP_ hys
60
mV
Notes:
5)
Guaranteed by design.


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