ROHM RLD78NZH1

RLD78NZH1
Laser diodes
AlGaAs laser diodes
RLD78NZH1
The RLD78NZH1 is the laser diode for laser printers that has excellent temperature characteristics and
excellent droop characteristics.
zExternal dimensions (Unit : mm)
zApplications
Laser printers
Optical sensors
Equivalent circuit diagram
φ3.6
1.0±0.1
Optical distance
1.35
φ5.6
+0
−0.025
Glass window
(3)
N
t
y
p
e
L.D.
P.D.
(1)
(2)
Chip
1.2±0.1
6.5±0.5
2.3
zFeatures
1) Absolute max. output power is
5mW.
2) High-precision, compact
package.(φ5.6mm)
3) Low droop.
4) Can be driven by single power
supply (N type).
φ4.4+0
φ1.0Min.
90°±2°
0.4±0.1
3−φ0.45
(2)
(3)
(1)
zAbsolute maximum ratings (Tc=25°C)
Parameter
Reverse
voltage
Output
Laser
Symbol
Limits
Unit
PO
5
mW
VR
2
V
VR (PIN)
30
V
Operating temperature
Topr
−10 to +60
°C
Storage temperature
Tstg
−40 to +85
°C
PIN photodiode
1/2
RLD78NZH1
Laser diodes
zElectrical and optical characteristics (Tc=25°C)
Parameter
Symbol
Min.
Threshold current
Ith
−
16
45
mA
Operating current
Iop
−
28
65
mA
PO=3mW
Operating voltage
Vop
−
1.9
2.3
V
PO=3mW
Differential efficiency
η
0.1
0.25
0.4
mW/mA
Monitor current
Im
0.2
0.45
0.9
mA
θ //∗
8
11
15
deg
Perpendicular divergence angle
θ ⊥∗
25
30
38
deg
Parallel deviation angle
∆θ //
−
−
±2
deg
Perpendicular deviation angle
∆θ ⊥
−
−
±3
deg
Emission point accuracy
∆X
∆Y
∆Z
−100
−
+100
µm
λ
770
785
795
nm
PO=3mW
∆P
−
5
10
%
PO=3mW
Parallel divergence angle
Peak emission wavelength
Droop
Typ.
Max.
Unit
Conditions
−
2mW
I(3mW) − I(1mW)
PO=3mW
PO=3mW
−
∗θ// and θ⊥ are defined as the angle within which the intensity is 50% of the peak value.
zElectrical and optical characteristic curves
Vf Po
[v] [mW]
3
5
0
[ IL ]
Im [mA]
1
.5
η
[W/A]
1.5
2
12.0
1
10.0
Vf
.75
25°C
50°C
60°C
70°C
2
3
.5
80°C
90°C
2
60 C
8.0
Droop (%)
4
6.0
25 C
4.0
1
0
.25
η
1
0
100
0
0
20
40
60
80
2.0
0.0 0
1
2
4
3
5
6
Output power (mW)
IF (mA)
Fig.2 Dependence of droop on
output power and temperature
Fig.1 Dependence of I−L on temperture
1
1
Tc=25°C
Tc=25°C
5mW
5mW
.8
.8
4mW
4mW
.6
.6
3mW
3mW
.4
.4
2mW
2mW
.2
.2
1mW
0 −60
−40
−20
0
20
40
60
1mW
0 −60
−40
−20
0
20
40
60
ANGLE (deg.)
ANGLE (deg.)
Fig.3 Paralle far field pattern
Fig.4 Perpendicular for field pattern
2/2
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 with 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.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1