Diodes AP3019A - Manual (Page 8)

Data Sheet
WHITE LED STEP-UP CONVERTER AP3019A
May. 2010 Rev. 1.8 BCD Semiconductor Manufacturing Limited
8
Typical Performance Characteristics (Continued)
WLED forward voltage (V
F
) is 3.45V at I
F
=20mA, unless otherwise noted.
Figure 12. Feedback Voltage vs. Figure 13. Schottky Forward Drop vs.
Junction Temperature Junction Temperature
Figure 14. Schottky Leakage Current vs. Figure 15. Current Limit vs. Duty Cycle
Junction Temperature
-50 -25 0 25 50 75 100
190
192
194
196
198
200
202
204
206
208
210
F
e
edb
ack Voltag
e (mV
)
Junction Temperature ( o C)
-50 -25 0 25 50 75 100
0.60
0.62
0.64
0.66
0.68
0.70
0.72
0.74
0.76
0.78
0.80
Sc
h
o
tt
ky
F
o
rw
ard Drop (
V
)
Junction Temperature ( o C)
I
D
=150mA
-50 -25 0 25 50 75 100
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
Sch
o
tt
ky Le
aka
ge C
u
rren
t (
µ A)
Junction Temperature ( o C)
V
R
=10V
V
R
=16V
V
R
=23V
30 40 50 60 70 80 90
100
200
300
400
500
600
700
-50 O C
25 O C
100 O C
Current
Limit
(mA
)
Duty Cycle (%)