4/30/03

Page 5 of 10

© 2003 Fairchild Semiconductor Corporation

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVER OUTPUT

(250/400 VOLT PEAK)

MOC3010M MOC3011M

MOC3012M

MOC3020M

MOC3021M

MOC3022M

MOC3023M

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

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.

τ

measured at this point and recorded.

Note: This optoisolator should not be used to drive a load directly.

It is intended to be a trigger device only.

Vdc

400V (MOC302X)

250V (MOC301X)

R = 10 k

Ω

X100

SCOPE

PROBE

PULSE

INPUT

MERCURY

WETTED

RELAY

D.U.T.

D.U.T.

Figure 5. Static dv/dt Test Circuit

252 V (MOC302X)

158 V (MOC301X)

0 VOLTS

APPLIED VOLTAGE

WAVEFORM

Vmax =

dv/dt =

0.63 Vmax

=

252

τ

RC

τ

RC

τ

RC

400 V (MOC302X)

= 250 V (MOC301X)

(MOC302X)

=

158

τ

RC

(MOC301X)

Figure 6. Resistive Load

1

2

3

6

5

4

0.1

µF

180

C1

2.4k

120 V

60 Hz

MOC3010M

MOC3011M

MOC3012M

1

2

3

6

5

4

120 V

60 Hz

180

MOC3010M

MOC3011M

MOC3012M