HCPL-0314-000E Datasheet, PDF (13/16 Pages) AVAGO TECHNOLOGIES LIMITED – 0.4 Amp Output Current IGBT Gate Drive Optocoupler

1
8
C_LEDP
2
7
3
6
C_LEDN
4
5
Figure 21. Optocoupler input to output capacitance model
for unshielded optocouplers.
1
C_LEDO1
8
C_LEDP
2
7
C_LEDO2
3
6
C_LEDN
4
5
SHIELD
Figure 22. Optocoupler input to output capacitance model
for shielded optocouplers.
+5 V
+
V_SAT
–
1
C_LEDP
2
I_LEDP
3
C_LEDN
4
SHIELD
8
0.1
7
µF
+
–
V_CC = 18 V
6
•••
Rg
5
•••
* THE ARROWS INDICATE THE DIRECTION
OF CURRENT FLOW DURING –dV_CM/dt.
+–
V_CM
Figure 23. Equivalent circuit for Figure 17 during common mode transient.
1
8
+5 V
C_LEDP
2
7
3
6
Q1
C_LEDN
I_LEDN
4
5
SHIELD
Figure 24. Not recommended open collector drive circuit.
13
1
8
+5 V
C_LEDP
2
7
3
6
C_LEDN
4
5
SHIELD
Figure 25. Recommended LED drive circuit for ultra-high CMR IPM
dead time and propagation delay specifications.