BRT21/ 22/ 23

Document Number 83690

Rev. 1.4, 10-Jan-05

Vishay Semiconductors

www.vishay.com

5

Typical Characteristics (Tamb = 25

°C unless otherwise specified)

Figure 2. Normalized LED Trigger Current vs. Power Factor

Figure 3. Forward Voltage vs. Forward Current

Figure 4. Peak LED Current vs. Duty Factor, Tau

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

IFth Normalized to IFth @ PF = 1.0

iil410_03

100

10

1

.1

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

IF - Forward Current - mA

Ta = -55°C

Ta = 25°C

Ta = 85°C

iil410_04

10-6

10-5

10-4

10 -3

10-2

10-1

10 0

101

10

100

1000

10000

t -LED Pulse Duration -s

.005

.05

.02

.01

.1

.2

.5

Duty Factor

t

τ

DF = /t

τ

Figure 5. Maximum LED Power Dissipation

Figure 6. Typical Output Characteristics

Figure 7. Current Reduction

iil410_05

100

80

60

40

20

0

-20

-40

-60

0

50

100

150

Ta - Ambient Temperature - °C

iil410_06

IT = f(VT),

parameter: Tj

iil410_07

Device switch

soldered in pcb

or base plate.