RLD78PZW4 Laser Diodes AlGaAs laser diode RLD78PZW4 The RLD78PZW4 is infrared laser diode high power output type (pulse 230mW). This is the best for optical disk drive use, such as CD-R / RW. !Applications Max. ×52 speed CD-R / RW drives. !Features 1) Absolute maximum optical power output : pulse 230mW 2) Wave length : Typ. 784nm 3) φ5.6mm small packages !External dimensions (Unit : mm) Equivalent circuit diagram φ3.6 1.0±0.1 φ5.6 +0 −0.025 φ4.4+0 φ1.0Min. 90°±2° 0.4±0.1 Glass window P t y p e (3) L.D. (1) (2) (1.27) 1.2±0.1 2.3 6.5±0.5 Chip 3−φ0.45 (3) (2) (1) !Absolute maximum ratings (Tc=25°C) Parameter Output Reverse voltage Raser Symbol Limits Unit PO Pulsed 230 Pulse condition : pulse 70nsec, Duty50% mW VR 2 V VR(PIN) − − Operating temperature Topr −10 to +75 (Pulsed) °C Storage temperature Tstg −40 to +85 °C PIN photodiode 1/2 RLD78PZW4 Laser Diodes !Electrical 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 30 50 mA − 133 165 mA Parallel divergence angle θ //∗ 8 9 10 deg Perpendicular divergence angle θ ⊥∗ 15 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 779 784 789 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. !Electrical and optical characteristics curves 20 6 Tc=25°C Tc=50°C Tc=70°C Tc=90°C 5 795 WAVELENGTH : λ (nm) 16 14 4 150 3 100 2 50 1 FFP (deg) 200 800 18 Se (mW / mA) OPTICAL POWER : PO (mW) 250 12 10 8 6 4 790 785 780 775 2 0 0 100 200 300 400 0 0 0 20 40 60 OPERATING CURRENT : IF (mA) PO (mW) Fig.1 Optical output vs. operating current 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. 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 use silicon as a basic material. 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-Rev1.0