Diodes AP3012 - Manual (Page 8)

1.5MHz STEP-UP DC-DC CONVERTER AP3012
8
May 2010 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
Data Sheet
Figure 9. Switching Current Limit vs. Duty Cycle
Typical Performance Characteristics (Continued)
Figure 10. Feedback Voltage vs. Junction Temperature Figure 11. Efficiency vs. Output Current
Figure 8. Efficiency vs. Junction Temperature
0 5 10 15 20 25 30 35 40 45
60
65
70
75
80
85
Ef
ficie
ncy
(%
)
Output Current (mA)
V
IN
=3.0V
V
IN
=3.6V
V
IN
=4.2V
V
IN
=5.0V
V
OUT
=24V
L=10 µ H
-50 -25 0 25 50 75 100
1.24
1.25
1.26
1.27
1.28
1.29
V
IN
=5V
V
OUT
=24V
I
OUT
=30mA
F
ee
dbac
k Volt
age (V
)
Junction Temperature ( o C)
0 20 40 60 80 100
0
200
400
600
800
1000
1200
Swit
chi
ng Current Li
m
it
(mA)
Duty Cycle (%)
-50 -25 0 25 50 75 100
50
55
60
65
70
75
80
85
V
IN
=5V
V
OUT
=24V
I
OUT
=30mA
Eff
ici
ency
(
%
)
Junction Temperature ( o C)