Data Sheet

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com
FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1 9
FOD2741A, FOD2741B, FOD2741C — Optically Isolated Error Amplifier
Typical Performance Curves (Continued)
T
A
– AMBIENT TEMPERATURE (°C)
I
LED
– FORWARD CURRENT (mA)
01051520253035404550
(IC/IF) – CURRENT TRANSFER RATIO (%)
40
60
80
100
120
140
0102030405060708090100
IC – COLLECTOR CURRENT (mA)
0
5
10
15
20
25
30
Fig. 15 – Collector Current vs. Ambient Temperature
Fig. 16 – Current Transfer Ratio vs. LED Current
V
CE
= 5V
0°C
25°C
70°C
I
LED
= 20mA
V
CE
= 5V
I
LED
= 10mA
I
LED
= 6mA
I
LED
= 1mA
Fig. 17 – Saturation Voltage vs. Ambient Temperature
V
CE(sat)
– SATURATION VOLTAGE (V)
0.10
0.12
0.14
0.16
0.18
0.20
0.22
-40 -20 0 20 40
T
A
– AMBIENT TEMPERATURE (°C)
60 80 100
0.24
0.26
T
A
– AMBIENT TEMPERATURE (°C)
V
CE
– COLLECTOR-EMITTER VOLTAGE (V)
-40 -20 0 20 40 60 80 100
I
CEO
– DARK CURRENT (nA)
0.1
1
10
100
1000
10000
012345678910
I
C
– COLLECTOR CURRENT (mA)
0
5
10
15
20
25
30
35
Fig. 14 – Dark Current vs. Ambient Temperature
Fig. 18 – Collector Current vs. Collector Voltage
V
CE
= 10V
T
A
= 25°C
I
LED
= 20mA
I
LED
= 10mA
I
LED
= 5mA
I
LED
= 1mA
TEMPERATURE (°C)
DELTA Vref / DELTA Vout ( mV/V)
-0.32
-0.34
-0.36
-0.38
-0.40
-0.42
-0.44
-0.46
-60 -40 -20 0 20 40 60 80 100 120
Fig. 19 – Rate of Change Vref to Vout vs. Temperature