RLD78PPY4 Laser Diodes AlGaAs laser diode RLD78PPY4 The RLD78PPY4 is infrared laser diode high power output type (pulse 240mW). This is the best for optical disk drive use, such as CD-R/RW. zApplications Max. X52 speed CD-R/RW drives. zFeatures 1) Absolute maximum optical power output : pulse 240mW 2) Wave length : Typ. 784nm 3) φ5.6mm small packages zDimensions (Unit : mm) Equivalent circuit diagram φ3.6 1.0±0.1 φ5.6 φ4.4+0 φ1.0Min. 90°±2° 0.4±0.1 P t y p e (3) L.D. (1) (2) +0 −0.025 (1.35) 1.2±0.1 2.3 6.5±0.5 Chip 3−φ0.45 (3) (2) (1) zAbsolute maximum ratings (Tc=25°C) Parameter Output Symbol Limits Unit PO Pulsed 240 Pulse condition : pulse 50ns, Duty50% mW VR 2 V VR(PIN) − − Operating temperature Topr −10 to +70 (Pulsed) °C Storage temperature Tstg −40 to +85 °C Reverse voltage Raser PIN photodiode 1/2 RLD78PPY4 Laser Diodes zElectrical and optical characteristics (Tc=25°C､CW) Parameter Symbol Min. Threshold current Ith − Operating current Iop − Operating voltage Vop − 2.1 2.5 V η 0.7 0.9 1.4 mW/mA Differential efficiency Typ. Max. Unit Conditions 35 50 mA − 133 165 mA Parallel divergence angle θ //∗ 7 8 10 deg Perpendicular divergence angle θ ⊥∗ 14 17 19 deg Parallel deviation angle ∆φ // −2 0 +2 deg Perpendicular deviation angle ∆φ ⊥ −3 0 +3 deg Emission point accuracy ∆X ∆Y ∆Z −80 0 +80 µm Peak emission wavelength λ 777 784 789 nm PO=90mW Astigmatism ∆ − − 6 µm NA=0.15, PO=90mW PO=90mW − ∗ θ // and θ ⊥ are defined as the angle within which the intensity is 50% of the peak value. zElectrical and optical characteristics curves Pulse 70ns 50% 795 16 5 14 4 150 3 100 2 12 10 8 6 790 785 780 4 50 0 18 WAVELENGTH : λ (nm) 200 800 20 6 Tc=25°C 50°C 70°C 90°C Se (mW / mA) FFP (deg) OPTICAL POWER : PO (mW) 250 0 100 200 300 OPERATING CURRENT : IF (mA) Fig.1 Optical output vs. operating current 400 775 1 2 0 0 0 20 40 60 Po (mW) Fig.2 PO vs. FFP 80 100 770 0 20 40 60 80 100 PACKAGE TEMPERATURE : TC (°C) Fig.3 Dependence of wavelength on temperature 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. 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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 Customer Support System www.rohm.com Copyright © 2007 ROHM CO.,LTD. THE AMERICAS / EUPOPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0