Data Sheet
WHITE LED STEP-UP CONVERTER
AP3019A
Typical Performance Characteristics (Continued)
WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
0.80
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
210
208
206
204
202
200
198
196
194
192
190
ID=150mA
-25
-50
-25
0
25
50
75
100
-50
0
25
50
75
100
Junction Temperature (oC)
Junction Temperature (oC)
Figure 12. Feedback Voltage vs.
Junction Temperature
Figure 13. Schottky Forward Drop vs.
Junction Temperature
700
600
500
400
300
200
100
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
VR=10V
VR=16V
VR=23V
-50OC
25OC
100OC
30
40
50
60
70
80
90
-50
-25
0
25
50
75
100
Junction Temperature (oC)
Duty Cycle (%)
Figure 14. Schottky Leakage Current vs.
Junction Temperature
Figure 15. Current Limit vs. Duty Cycle
Mar. 2010 Rev. 1.7
BCD Semiconductor Manufacturing Limited
8
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
