©2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

MOC20xM, MOC21xM Rev. 1.5

7

Typical Performance Curves (Continued)

Figure 12. Switching Time Test Circuit and Waveforms

Figure 10. Normalized ton vs. RBE

Figure 11. Normalized toff vs. RBE

Figure 9. CTR vs. RBE (Saturated)

RBE –

RBE –

BASE RESISTANCE (k

Ω)

10

100

1000

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

IF = 20 mA

IF = 10 m A

IF = 5 mA

VCE = 0.3 V,TA = 25°C

Normalized to:

CTR at RBE = Open

BASE RESISTANCE (M

Ω)

(M

Ω)

0.01

0.1

1

10

100

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

VCC = 10 V

IC = 2 mA

RL = 100Ω

NORMALIZED TO :

ton AT RBE = OPEN

RBE – BASE RESISTANCE

0.01

0.1

1

10

100

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

VCC = 10 V

IC = 2 mA

RL = 100 Ω

NORMALIZED TO :

tofff AT RBE = OPEN

OUTPUT PULSE

INPUT PULSE

TEST CIRCUIT

tr

tf

INPUT

IF

RL

RBE

VCC = 10 V

OUTPUT

ton

10%

90%

toff

IC

Adjust IF to produce IC = 2 mA

WAVEFORMS