©2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
FOD2712 Rev. 1.0.0 9
FOD2712 — Optically Isolated Error Amplifier
Typical Performance Curves (Continued)
Fig.13 LED Forward Current vs. Forward Voltage
V
F
– FORWARD VOLTAGE (V)
0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35
I
LED
–
FORWARD CURRENT (mA)
0
5
10
15
20
70°C
0°C
0°C
25°C
25°C
Fig.14 Dark Current vs. Temperature
T
A
– AMBIENT TEMPERATURE (°C)
-40 -20 0 20 40 60 80 100
I
CEO
– DARK CURRENT (nA)
0.1
1
10
100
1000
Fig. 15 Collector Current vs. Ambient Temperature
T
A
– AMBIENT TEMPERATURE (°C)
-40 -20 0 20 40 60 80 100
I
C
– COLLECTOR CURRENT (mA)
0
5
10
15
20
25
30
I
LED
= 20mA
I
LED
= 10mA
I
LED
= 5mA
I
LED
= 1mA
Fig. 16 Current Transfer Ratio vs. LED Current
I
LED
– FORWARD CURRENT (mA)
01020304050
(I
C
/I
F
) – CURRENT TRANSFER RATIO (%)
0
20
40
60
80
100
120
140
160
70°C
V
CE
= 5V
Fig. 17 Saturation Voltage vs. Ambient Temperature
T
A
– AMBIENT TEMPERATURE (°C)
-40 -20 0 20 40 60 80 100
V
CE (sat)
– SATURATION VOLTAGE (V)
0.10
0.12
0.14
0.16
0.18
0.20
0.22
V
CE
= 10V
V
CE
= 5V
