MP4688 – 80V INPUT, 1A HIGH POWER LED DRIVER
ELECTRICAL CHARACTERISTICS
VIN = 60V, TA= +25°C, unless otherwise noted.
Specifications over temperature are guaranteed by design and characterization.
Parameter
Symbol Condition
Min
Typ
Max
Units
VIN UVLO Threshold
3.6
4.0
4.4
V
VIN UVLO Hysteresis
Shutdown Supply Current
Quiescent Supply Current
Upper Switch On Resistance (5)
Upper Switch Leakage Current
Current Limit
EN Up Threshold
EN Threshold Hysteresis
EN Input Current
EN Sinking Current
DIM Up Threshold
DIM Threshold Hysteresis
DIM Input Current
0.4
2
170
360
0.01
3.2
1.55
320
0.01
2
1.15
300
V
µA
µA
mΩ
µA
A
VEN = 0V
No load, VFB = 250mV
RDS(ON) VBST – VSW = 5V
5
220
ISWLK
IPK
VENH
VENHY
IENI
VEN = 0V, VSW = 0V
VFB = 0.15V
1
2.5
1.4
1.7
V
mV
µA
µA
V
mV
µA
VEN =5V
VEN =2V
1
3
1.5
IENS
VDIMH
VDIMHY
IDIM
0.8
-1
VDIM =5V or 0V
1
VFB=0V, VDIM Rising edge to
DIM On Propagation Delay
TDIMDH
TDIMDL
VFBH
50
50
ns
ns
VSW Rising Edge
VFB=0V, VDIM Falling edge to
VSW Falling Edge
4.5V < VIN < 75V, VFB rising
from 0V until VSW < 30V
4.5V < VIN < 75V, VFB falling
from 0.25V until VSW > 30V
VFB=5V or 0V
DIM Off Propagation Delay
Feedback Voltage Threshold High (5)
210
215
185
220
mV
Feedback Voltage Threshold Low (5)
FB Pin Input Current
VFBL
IFB
180
190
300
mV
nA
-300
Falling edge of VFB from
0.25V to 0V to VSW rising
edge
FB Propagation Delay to Output
High
TFBDH
100
ns
Rising edge of VFB from 0V
to
0.25V to VSW falling edge
FB Propagation Delay to Output
High
TFBDL
100
150
ns
Thermal Shutdown
Hysteresis = 20°C
°C
Note:
5) Guaranteed by design.
MP4688 Rev. 1.12
3/28/2012
www.MonolithicPower.com
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© 2012 MPS. All Rights Reserved.
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