Document Number: 83690

For technical questions, contact: optocouplers.answers@vishay.com

www.vishay.com

Rev. 1.5, 07-May-08

197

BRT21/BRT22/BRT23

Optocoupler, Phototriac Output,

Zero Crossing

Vishay Semiconductors

TYPICAL CHARACTERISTICS

Fig. 2 - Normalized LED Trigger Current vs. Power Factor

Fig. 3 - Forward Voltage vs. Forward Current

Fig. 4 - Peak LED Current vs. Duty Factor, Tau

Fig. 5 - Maximum LED Power Dissipation

Fig. 6 - Typical Output Characteristics

Fig. 7 - Current Reduction

iil410_02

1.2

1.0

0.8

0.6

0.4

0.2

0.0

0.8

1.0

1.2

1.4

1.6

1.8

2.0

PF - Power Factor

Ta = 25 °C

iil410_03

100

10

1

0.1

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

Ta = - 55 °C

Ta = 25 °C

Ta = 85 °C

iil410_04

10

100

1000

10000

t - LED Pulse Duration (s)

0.005

0.05

0.02

0.01

0.1

0.2

0.5

Duty Factor

t

τ

DF = /t

τ

iil410_05

100

80

60

40

20

0

- 20

- 40

- 60

0

50

100

150

5

5

5

01

2

4

3

iil410_06

100 °C

400

300

200

100

0

020

40

60

80

100

iil410_07

Device switch

soldered in pcb

or base plate.