Diodes AP3031 - Manual (Page 6)

Data Sheet
6
Dec. 2012 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
WHITE LED STEP-UP CONVERTER AP3031
Typical Performance Characteristics
Figure 6. Minimum Operating Voltage vs. Temperature Figure 7. Quiescent Current vs. Input Voltage
Figure 4. Efficiency vs. Output Current Figure 5. Efficiency vs. Input Voltage
(WLED forward voltage (V
F
)=3.2V at I
F
=20mA, unless otherwise noted.)
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340
45
50
55
60
65
70
75
80
85
90
Ef
fici
en
cy (
%
)
Output Current (mA)
V
IN
=5V, V
OUT
=10V, T
A
=25 o C
C
IN
=10 μ F, C
OUT
=0.47 μ F, L=4.7 μ H
3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5
50
55
60
65
70
75
80
85
90
95
Ef
ficiency (%)
Input Voltage (V)
V
OUT
=10V, I
OUT
=260mA,T
A
=25 o C
C
IN
=10 μ F, C
OUT
=0.47 μ F, L=4.7 μ H
-60 -40 -20 0 20 40 60 80 100 120 140
2.20
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
M
inimum
O
perating
Voltage (
V)
Temperature ( o C)
2 4 6 8 10 12 14 16
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
Q
uiescent Current (mA
)
Input Voltage (V)
T
A
= -40 o C
T
A
= 25 o C
T
A
= 85 o C