TM
MP1528 – 9 LAMP, 36V PRECISION WHITE LED DRIVER
ELECTRICAL CHARACTERISTICS (continued)
VBIAS = VEN = 5.0V, VBRT = 1.2V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
40
Max
Units
Open Load Shutdown
Threshold
Measured at BIAS
VBIAS = 20V, VEN < 0.4V
BIAS = 40V, VEN < 0.4V
V
5
µA
µA
Bias Current
V
70
100
Feedback Comparator
FB Regulation Threshold
FB Hysteresis
VFB
VBRT = 1.2V
VFB = 0.2V
0.38
0.40
10
0.42
V
mV
nA
FB Input Leakage Current
PWM Mode Using BRT
Output-Off Threshold
BRT Input Leakage Current
BRT Full-Scale Threshold
Output Switch
–150
–80
0.18
0.27
1.2
V
nA
V
VBRT = 0.6V
VBIAS = 5.0V
–100
SW On-Resistance
RON
0.63
950
160
ꢀ
SW Current Limit
mA
°C
Thermal Shutdown
MP1528 Rev. 1.7
2/21/2006
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