52
GH20795A6CLaser Diodes
Notice In t h e a b s e n c e o f c o n firmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
Internet Internet address for Electronic Components Group http://sharp-world.com/ecg/
❇1Case temperature
❇2Pulse width : 0.5µs, Duty : 50%
❇3At the position of 1.6mm or more from the lead base (Within 3s)
❇4CW (Continuous Wave) drive
Parameter Symbol Unit
Reverse voltage
❇1Storage temperature Tstg ˚C
❇3Soldering temperature Tsld ˚C
❇4Optical power output PO95 mW
Laser Vrl V
❇1Operating temperature Top(c) ˚C
Rating
7
2
-10 to +70
-40 to +85
300
Red laser Infrared laser
■Absolute Maximum Ratings (TC=25˚C ❇1)
GH20795A6C
■Features
(1) Dual-wavelength type
With 2-laser chips for CD-R/RW and for DVD-ROM
(2) Wavelength : TYP. 784nm/654nm
(3) High power (pulse 135mW-784nm), ◊12 speed CD-R/RW
writing
(4) Operating temperature : MAX. 70˚C
(5) Bottom face cutting package (φ5.6mm) enables to design
a slim drive.
■Applications
(1) Slim combo drives (CD-R/RW+DVD-ROM drive)
■Outline Dimensions
Dual-wavelength(1 Pac k age) Laser Diode for Slim Type Combo
Drive (CD-R/RW+DVD-ROM) (654nm-7mW, 784nm-95mW)
(Unit : mm)
1.75 MAX.
1.2±0.08
1.7±0.05
1.2±0.08
90
˚±2˚
❇2
90
˚±2˚
❇2
Reference plane
Emission point
Z=1.27±0.08
Tolerance ±0.2mm
Cap glass ❇1
❇2
0.4±0.1
ø2
2
31
0.4±0.1
ø3.55±0.1
ø5.6+
–0
0.025
2.3±0.5
1.2±0.1
6.5±1.0
Y
ZX
0.5 MIN.
ø4.4 MAX.
0.5 MAX.
3-ø0.45±0.1
Terminal connection
q
w
e
GND
Red laser
Infrared laser
❇1 : Dimension measured at lead
base
❇2 : Within 0.6mm from reference
plane
❇2Optical power output (Pulse) Pp- 135 mW
Notice In t h e a b s e n c e o f c o n firmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
devices shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
Internet Internet address for Electronic Components Group http://sharp-world.com/ecg/
53
GH20795A6CLaser Diodes
■Electro-optical Characteristics❇1(TC=25˚C)
Parameter Symbol Unit
Threshold current Ith 40 mA
Half intensity
angle
❇2❇3
Parallel θ// 10 ˚
19
❇4Ripple Rl+20 %
Misalignment
angle
∆θ⊥ +2
❇1Initial value, CW (Continuous Wave) drive
❇2Angle at 50% peak intensity (full-width at half-
maximum)
❇3
Parallel to the junction plane (X-Z plane), Perpendicular to the junction plane (Y-Z plane)
❇4Rl=∆P/P ∆P : the maximum deviation of the far field pattern from its approximate
curve P : the peak of the approximate curve
Red laser
−-23
78.5
❇2❇3
Perpendicular
25 29
-20 -
-2 -
Operating current Iop
Po=5mW
- 33 145 mA
Operating voltage Vop -2.2 2.5V
Wavelength λp640 654 787 nm
θ⊥
❇3
Parallel ∆θ// -1.5 - +1.5 ˚
❇3
Perpendicular
Differential efficiency ηd3mW
I(5mW)-I(2mW) 0.3 0.55 1.2
mW/mA
Interference pattern intensity
αPo=5mW - - 1 -
Infrared laser
35 - 30
49
Po=80mW
120
2.7 1.95
660 784
10 9
35 17
+20 -
+1.5 -
+2 -
0.8 55mW
I(80mW)-I(25mW)
0.9
1 Po=80mW -
Conditions MIN. TYP. MAX. Conditions TYP. MAX.MIN.
-
-
-
780
8
15
-20
-1.5
-2
0.7
-
˚
˚
Distance between laser emission points Unit : µm
■Distance between Laser Emission Points and Emission Point Accuracy
100±10
dY 44.2±20
dZ 0±10
Red laser emission point accuracy Unit : µm
∆X
∆Y±80
∆Z
±80
±80
Emission point
of red laser = Center of
the stem
Emission point of infrared laser
dY
dX
Y
X
Reference plane
Emission point of red laser
CL
Emission point of infrared laser
dZ
Z
dX
• Please refer to the chapter "Handling Precautions"
115
Application Circuits
NOTICE
●The circuit application examples in this publication are provided to explain representative applications
of SHARP devices and are not intended to guarantee any circuit design or license any intellectual
property rights. SHARP takes no responsibility for any problems related to any intellectual property
right of a third party resulting from the use of SHARP's devices.
●Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
SHARP reserves the right to make changes in the specifications, characteristics, data, materials,
structure, and other contents described herein at any time without notice in order to improve design or
reliability. Manufacturing locations are also subject to change without notice.
●Observe the following points when using any devices in this publication. SHARP takes no responsibility
for damage caused by improper use of the devices which does not meet the conditions and absolute
maximum ratings to be used specified in the relevant specification sheet nor meet the following
conditions:
(i) The devices in this publication are designed for use in general electronic equipment designs such as:
--- Personal computers
--- Office automation equipment
--- Telecommunication equipment [terminal]
--- Test and measurement equipment
--- Industrial control
--- Audio visual equipment
--- Consumer electronics
(ii)Measures such as fail-safe function and redundant design should be taken to ensure reliability and
safety when SHARP devices are used for or in connection with equipment that requires higher
reliability such as:
--- Transportation control and safety equipment (i.e., aircraft, trains, automobiles, etc.)
--- Traffic signals
--- Gas leakage sensor breakers
--- Alarm equipment
--- Various safety devices, etc.
(iii)SHARP devices shall not be used for or in connection with equipment that requires an extremely
high level of reliability and safety such as:
--- Space applications
--- Telecommunication equipment [trunk lines]
--- Nuclear power control equipment
--- Medical and other life support equipment (e.g., scuba).
●Contact a SHARP representative in advance when intending to use SHARP devices for any "specific"
applications other than those recommended by SHARP or when it is unclear which category mentioned
above controls the intended use.
●If the SHARP devices listed in this publication fall within the scope of strategic products described in
the Foreign Exchange and Foreign Trade Control Law of Japan, it is necessary to obtain approval to
export such SHARP devices.
●This publication is the proprietary product of SHARP and is copyrighted, with all rights reserved. Under
the copyright laws, no part of this publication may be reproduced or transmitted in any form or by any
means, electronic or mechanical, for any purpose, in whole or in part, without the express written
permission of SHARP. Express written permission is also required before any use of this publication
may be made by a third party.
●Contact and consult with a SHARP representative if there are any questions about the contents of this
publication.
