Diodes AP3031 - Manual (Page 8)

Data Sheet
8
Dec. 2012 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
WHITE LED STEP-UP CONVERTER AP3031
Figure 13. OVP Voltage vs. Temperature
Typical Performance Characteristics (Continued)
Figure 12. Frequency vs. Temperature
Figure 14. Frequency vs. Input Voltage Figure 15. Switch Current Limit vs. Duty Cycle
(WLED forward voltage (V
F
)=3.2V at I
F
=20mA, unless otherwise noted.)
-60 -40 -20 0 20 40 60 80 100 120 140
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
Fr
e
quency (MHz
)
Temperature ( o C)
-60 -40 -20 0 20 40 60 80 100 120 140
14
15
16
17
18
19
20
O
VP Voltage
(V
)
Temperature ( o C)
2 4 6 8 10 12 14 16 18
0.70
0.75
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
Frequen
cy (
M
Hz)
Input Voltage (V)
10 20 30 40 50 60 70 80 90
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Swit
ch
Current Li
m
it (A)
Duty Cycle (%)
T
A
=-40 o C
T
A
=25 o C
T
A
=85 o C