WHITE LED STEP-UP CONVERTER
Typical Performance Characteristics (Continued)
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
Data Sheet
AP3029
210
208
206
204
202
200
198
196
194
192
190
-50
-25
0
25
50
75
100
Junction Temperature (oC)
Figure 12. Feedback Voltage
vs. Junction Temperature
0.80
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
-50
-25
0
25
50
75
100
Junction Temperature (oC)
Figure 13. Schottky Forward Drop
vs. Junction Temperature
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
-50
V =10V
R
V =16V
R
V =23V
R
-25
0
25
50
75
100
Junction Temperature (oC)
Figure 14. Schottky Leakage Current
vs. Junction Temperature
700
600
500
400
300
-50OC
200
25OC
100OC
100
30
40
50
60
70
80
90
Duty Cycle (%)
Figure 15. Switch Current Limit vs. Duty Cycle
Oct. 2009 Rev. 1. 8
BCD Semiconductor Manufacturing Limited
8