FODM3062 Datasheet, PDF (6/10 Pages) Fairchild Semiconductor – 4-Pin Full Pitch Mini-Flat Package Zero-Cross Triac Driver Output Optocouplers

Typical Performance Curves
800V (FODM3082)Vdc
(FODM3083)
600V (FODM3062)
(FODM3063)
PULSE
INPUT
R_TEST
MERCURY
WETTED
RELAY
C_TEST
R = 10 kΩ
D.U.T.
X100
SCOPE
PROBE
1. The mercury wetted relay provides a high speed repeated
pulse to the D.U.T.
2. 100x scope probes are used, to allow high speeds and
voltages.
3. The worst-case condition for static dv/dt is established by
triggering the D.U.T. with a normal LED input current, then
removing the current. The variable RTEST allows the dv/dt
to be gradually increased until the D.U.T. continues to trigger
in response to the applied voltage pulse, even after the LED
current has been removed. The dv/dt is then decreased until
the D.U.T. stops triggering. tRC is measured at this point
and recorded.
APPLIED VOLTAGE
WAVEFORM
0 VOLTS
378V (FODM3062, FODM3063)
504V (FODM3082, FODM3083)
τ_RC
Note:
This optoisolator should not be used to drive a load directly. It is intended to be a trigger device only.
V_max = 800V (FODM3082, FODM3083)
= 600V (FODM3062, FODM3063)
dv/dt =
0.63 Vmax
τ_RC
=
378
τ_RC ^{(FODM3062, FODM3063)}
=
504
τ_RC
(FODM3082,
FODM3083)
Figure 8. Static dv/dt Test Circuit
V_CC
R_in
1
4
360 Ω
FODM3062
FODM3063
FODM3082
FODM3083
2
3
330
39*
0.01
HOT
240 VAC
Typical circuit for use when hot line switching of 240VAC
is required. In this circuit the “hot” side of the line is
switched and the load connected to the cold or neutral
side. The load may be connected to either the neutral or
hot line.
Rin is calculated so that IF is equal to the rated IFT of the
part, 5mA for the FODM3063/83 and 10mA for the
FODM3062/82. The 39Ω resistor and 0.01µF capacitor are
for snubbing of the triac and may or may not be necessary
depending upon the particular triac and load used.
LOAD
NEUTRAL
*^{For highly inductive loads (power factor < 0.5), change this value to 360 ohms.}
Figure 9. Hot-Line Switching Application Circuit
R1 D1
1
V_CC
4
FODM3062
FODM3063
FODM3082
R_in
FODM3083
2
3
360 Ω
SCR
240 VAC
SCR
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 ohms.
R2
D2
Note:
LOAD
This optoisolator should not be used to drive a load directly. It is intended to be a trigger device only.
Figure 10. Inverse-Parallel SCR Driver Circuit (240VAC)
6
FODM306X/FODM308X Rev. 1.0.4
www.fairchildsemi.com