HAMAMATSU L7868-02, L7868-01, L7868 Datasheet

LED

Red LED

L7868 series

Small emission spot, red LED using current confined chip

L7868/-02 are red LEDs with a microball lens bonded to the current-confined structure chip surface. L7868-01 uses the same structure LED chip
with no microball lens and provides a smaller emission spot of φ150 µm. L7868-02 uses a glass lens window for even narrower directivity (beam
spread).

Features

l

Small emission spot
L7868: φ400 µm
L7868-01: φ150 µm

l

Uniform emission pattern

l

Narrow directivity: L7868-02

Applications

l

Optical switches

l

Automatic control system

■ Absolute maximum ratings (Ta=25 °C, unless otherwise noted)

Parameter Symbol Condition Value Unit

Reverse voltage V
Forward current I
Forward current

derating rate
Pulse forward
current
Pulse forward
current derating rate
Power dissipation P 180 mW
Operating
temperature
Storage temperature Tstg -40 to +100 °C

4

.

- Ta > 25 °C 0.8 mA/°C

Pulse width=10 µs

I

.2

Duty ratio=1 %

- Ta > 25 °C 7 mA/°C

Topr -30 to +85 °C

3V

60 mA

0.5 A

■ Electrical and optical characteristics (Ta=25 °C)

Parameter Symbol Condition

Peak emission
wavelength
Spectral half width
(FWHM)
Radiant flux

Radiant illuminance P-I.=20 mA - 0.1 - - - - - 0.4 - mW/cm
Forward voltage V.I.=20 mA - 1.9 2.2 - 1.9 2.2 - 1.9 2.2 V
Pulse forward

voltage
Reverse current I

Rise time tr

Fall time tf

lp

Dl

fe

V

=20 mA 650 670 700 650 670 700 650 670 700 nm

.

I

I.=20 mA - 20 - - 20 - - 20 - nm

I.=20 mA 0.35 0.45 - 0.15 0.2 - 0.35 0.45 - mW

=0.5 A - 4.3 5.5 - 4.3 5.5 - 4.3 5.5 V

.2I.

V4=3 V - - 10 - - 10 - - 10 µA

4

I.=20 mA,
10 % to 90 %

=20 mA,

I.
90 % to 10 %

L7868 L7868-01 L7868-02

Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.

- 0.06 0.1 - 0.06 0.1 - 0.06 0.1 µs

- 0.06 0.1 - 0.06 0.1 - 0.06 0.1 µs

Unit

1

Red LED

L7868 series

■ Emission spectrum

100

80

60

40

20

RELATIVE RADIANT OUTPUT (%)

0

600 650 700 750

WAVELENGTH (µm)

(Typ. Ta=25 ˚

C,

IF=20 mA)

KLEDB0238EA KLEDB0242EA

■ Radiant flux vs. forward current

(Typ. Ta=25 ˚

L7868/-02

FORWARD CURRENT (mA)

800

100

10

1

RADIANT FLUX (mW)

0.1
10 100

C, tw=100 µs, 0.1 %

L7868-01

■ Directivity ■ Radiant output vs. ambient

20˚ 10˚ 10˚ 20˚

L7868-02

30˚

40˚

50˚

60˚

70˚

80˚

90˚

RELATIVE RADIANT OUTPUT (%)

100 %

80 %

60 %

40 %

20 %

(Typ. Ta=25 ˚C)

L7868

L7868-01

30˚

40˚

50˚

60˚

70˚

80˚

90˚

KLEDB0244EA

temperature

+3

+2

+1

0

-1

-2

-3

-4

RELATIVE RADIANT OUTPUT (dB)

-5

-40 -20 40 100020 6080

AMBIENT TEMPERATURE (˚C)

(Typ. IF=50 mA)

)

1000

KLEDB0245EA

■ Forward current vs. forward voltage

˚C, tw=100 µs, 0.1 %

1000

100

10

FORWARD CURRENT (mA)

1

1234

(Typ.Ta=25

FORWARD VOLTAGE (V)

)

5

KLEDB0243EA

■ Allowable forward current vs.

ambient temperature

100

80

60

40

20

0

RELATIVE ALLOWABLE FORWARD CURRENT (%)

-40 -20 0 20

AMBIENT TEMPERATURE (˚C)

40 60 80 100

(Typ.)

KLEDB0027EB

■ Allowable forward current vs.

duty ratio

(Typ.

10

1

Ta=25

PULSE WIDTH=1 µs

˚C)

■ ■

■ Dimensional outlines (unit: mm)

■ ■

L7868/-01 L7868-02

5.4 ± 0.2

4.7 ± 0.1

GLASS

WINDOW

3.0 ± 0.1

5.4 ± 0.2

4.65 ± 0.1

3.6 ± 0.2

PULSE WIDTH=10 µs

0.1

ALLOWABLE FORWARD CURRENT (A)

0.01

0.01

PULSE WIDTH=100 µs

0.1 1 10 100

DUTY RATIO (%)

0.45
LEAD

13.5

2.54 ± 0.2

KLEDB0246EA

COMMON TO CASE

KLEDA0075EA

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K.

0.45
LEAD

COMMON TO CASE

2.54 ± 0.2

4.5 ± 0.2

HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: [phone], Fax: [phone], http://www.hamamatsu.com

U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone]
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: [phone], Fax: [phone]
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

2

6.65 ± 0.213.5

KLEDA0076EA

Cat. No. KLED1038E01

Dec. 2001 DN