Diodes AP3036/A - Manual (Page 6)

Preliminary Datasheet
WHITE LED STEP-UP CONVERTER AP3036/A
Jul. 2012 Rev. 1.3 . BCD Semiconductor Manufacturing Limited
6
2 3 4 5 6 7 8
72
74
76
78
80
82
84
86
88
90
Ef
ficiency (%)
LED Numbers
V
IN
=3.6V
I
OUT
=20mA
0 100 200 300 400 500
0
400
800
1200
1600
Schott
k
y
F
o
rward Volt
a
ge
(mV)
Schottky Forward Current (mA)
0 2 4 6 8 10 12 14 16 18 20
30
40
50
60
70
80
90
100
Shutdown Current
(
µ A)
Input Voltage (V)
V
CRTL
=0V
0 4 8 12 16 20
2.8
3.0
3.2
3.4
3.6
3.8
Q
u
iescent Current (mA
)
Input Voltage (V)
V
FB
=1.0V
Typical Performance Characteristics
The WLED forward voltage (V
F
) is 3.45V at I
F
=20mA, unless otherwise noted.
Figure 4. Efficiency vs. LED’s Number Figure 5. Schottky Forward Voltage vs.
Schottky Forward Current
Figure 6. Shutdown Current vs. Input Voltage Figure 7. Quiescent Current vs. Input Voltage