AND156SYP

AS AIInGaP Super Yellow Light Emission

Ultra Bright LED Lamps

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

Tel: 408.523.8200 • Fax: 408.733.1287 • sales@purdyelectronics.com • www.purdyelectronics.com

7/18/07

Radiation Characteristics

0

10

20

30

40

50

60

70

80

90

00.5

Relative Intensity vs. Wavelength

500

550

600

650

700

0.2

0.4

0.6

0.8

1.0

Wavelength (nm)

Forward Current vs. Forward Voltage

1.0

1.5

2.0

2.5

3.0

3.5

10

20

30

40

50

Forward Voltage (V)

Forward Current vs. Relative Intensity

0

10

20

30

40

50

0.5

1.0

1.5

2.0

2.5

Forward Current (mA)

Forward Current vs. Ambient Temp.

0

20

40

60

80

100

10

20

30

40

50

Relative Intensity vs. Ambient Temp.

25

35

45

55

65

0.0

0.5

1.0

1.5

2.0

Ambient Temperature Ta (ºC)

0.0

30

40

50

60

70

Radiation Angle

1.0

0

0.5

1.0

Ambient Temperature Ta (ºC)

0

0

0.0

When the LEDs are connected using serial circuit,

if either one of the LEDs does not light up, then

current will not flow causing the other LEDs to not

light up. In the new design, the LEDs are in parallel

with the zener diodes. If either one of the LEDs

does not light up, current can still flow through

causing the others to light up.