Datasheet

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com
FOD420, FOD4208, FOD4216, FOD4218 Rev. 1.4.0 8
FOD420, FOD4208, FOD4216, FOD4218 — 6-Pin DIP Triac Drivers
Figure 12. Inverse-Parallel SCR Driver Circuit
V
CC
R
in
1
2
3
6
5
4
240 VAC
SCR
360Ω
R1 D1
SCR
R2 D2
LOAD
FOD420
FOD4208
FOD4216
FOD4218
Suggested method of firing two, back-to-back SCR’s with a Fairchild triac driver. Diodes can be 1N4001; resistors,
R1 and R2, are optional 330 Ω .
Note: This optoisolator should not be used to drive a load directly. It is intended to be a discrete triac driver device
only.