MOC3021 MOC3022 MOC3023

3

Motorola Optoelectronics Device Data

TA, AMBIENT TEMPERATURE (°C)

– 40

100

1

– 30 – 20 –10

0

10

20

30

40

50

60

70

80

10

0.7

Figure 3. Trigger Current versus Temperature

–40

TA, AMBIENT TEMPERATURE (°C)

0.8

1.1

1.3

1.4

–20

0

20

40

60

80

0.6

100

5

1

PWin, LED TRIGGER WIDTH (µs)

10

15

20

25

2

5

20

10

50

0

100

NORMALIZED TO:

PWin q 100 µs

Figure 4. LED Current Required to Trigger

versus LED Pulse Width

2

40

TA, AMBIENT TEMPERATURE (°C)

4

6

8

10

25 30

50

70

60

80

0

100

90

12

STATIC dv/dt

CIRCUIT IN FIGURE 7

Figure 5. dv/dt versus Temperature

+400

Vdc

PULSE

INPUT

MERCURY

WETTED

RELAY

RTEST

CTEST

R = 10 k

Ω

X100

SCOPE

PROBE

D.U.T.

APPLIED VOLTAGE

WAVEFORM

252 V

0 VOLTS

tRC

Vmax = 400 V

dv dt

+

0.63 Vmax

t

RC

+ 252

t

RC

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.

0.9

1

1.2

Figure 6. Leakage Current, IDRM

versus Temperature

Figure 7. Static dv/dt Test Circuit