LF-301 A / K Series
LED displays
Electrical and optical characteristic curves
100
Ta=25°C
10.00
10
Relative Luminous Intensity
Forward Current:I
F
(mA)
LF-301MA
LF-301MK
LF-301VA
LF-301VK
Ta=25°C
1.00
1
0.10
0.1
1
1.5
2
2.5
3
0.01
1
10
Forward Current:I
F
(mA)
100
Forward Voltage:V
F
(V)
Fig.1 Forward Current - Forward Voltage
Fig.2 Relative Luminous Intensity - Forward Current
I
F
=10mA
I
F
peak Max.
Ratio of Maximum Tolerable peak
I
F
Max.
Current to Maximum Forward Current
1.6
1.4
Relative Luminous Intensity
)
10
LF-301MA
LF-301MK
1.2
1
0.8
0.6
0.4
-25 -15 -5
(
100kHz
300Hz
100Hz
30kHz
10kHz
5
15 25 35 45 55 65 75
1
1
300kHz
10
100
1000
30Hz
3kHz
1kHz
10000
100000
Case Temparature (°C)
Pulse Duration : tw(µs)
Fig.3 Relative Luminous Intensity - Case Temperature
Fig.4 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
Ι
)
)
I
F
peak Max.
Ratio of Maximum Tolerable peak
I
F
Max.
Current to Maximum Forward Current
10
120%
LF-301VA
LF-301VK
500Hz
200Hz
100Hz
50kHz
20kHz
10kHz
100%
80%
60%
40%
20%
0%
-25 -15 -5
(
5kHz
2kHz
1kHz
1
1
Forward Current (%)
10
100
1000
10000
5 15 25 35 45 55 65 75 85
Ambient Temperature(°C)
Pulse Duration : tw(µs)
Fig.5 Ratio of Maximum Tolerable Peak Current - Pulse Duration (
ΙΙ
)
Fig.6 Derating
Rev.B
3/3
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
ROHM
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2008 ROHM CO.,LTD.
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