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EL6243C
(R)
EL6243C
3-Channel Laser Diode Driver w/Oscillator & APC Amplifier
PRODUCT BRIEF
(R)
Features
* Shrink-Small Outline Package * Voltage-controlled output current source requiring one external set resistor per channel * Rise time = 0.8ns * Fall time = 0.8ns * On chip oscillator with frequency and amplitude control by use of external resistors to ground * Oscillator to 500MHz * Oscillator to 100mA pk/pk * Single +5V supply (10%) * Disable feature for power-up protection and power savings * Fast Settling APC Amplifier
General Description
The EL6243C is a high-performance three channel laser driver that provides controlled current to a grounded laser diode. Write channels 2 and 3 should be used as the write channels, with switching speeds of approximately one nanosecond rise/fall time. All three channels are summed together at the IOUT output, allowing the user to create multilevel waveforms in order to optimize laser diode performance. The level of the output current is set by an analog voltage applied to an external resistor which converts the voltage into a current at the IIN pin (virtually ground). The current seen at this pin is then amplified to become a current source at pin IOUT. An on-chip 500MHz oscillator is provided to allow output current modulation when in any mode. This is turned on when the OSCEN pin is held high. Complete control of amplitude and frequency is set by two external resistors connected to ground at pins RFREQ and RAMP (see graphs in this data sheet for further explanation). The EL6243C also includes a fast settling APC amplifier designed to interface directly with the front end monitor diode and the sampleand-hold amplifier for read and write power control. Its 100MHz bandwidth and 30ns settling time enable up to 16X CD-RW design.
Applications
* CD-RW applications * Writable optical drives * Laser diode current switching
Connection Diagrams Ordering Information
Part No. EL6243CU EL6243CL Temp. Range 0C to +70C 0C to +70C Package QSOP-24 LPP-24 Outline # MDP0040 MDP0046
1 VOUT 2 VREF 3 GND 4 IINR 5 IIN2 6 IIN3 7 RFREQ 8 GND 9 GND 10 WEN3 11 WEN2 12 GND
PDIN 24 22 VOUT 23 VREF 20 VCC 19 VCC 18 IOUT 17 IOUT Thermal Pad 16 GND 15 GND 14 RAMP 13 ENABLE GND 10 VCC 11 OSCEN 12 WEN2 8 GND 9 VCC 23 VCC 22 IOUT 21 IOUT 20 GND 19 GND 18 RAMP 17 ENABLE 16 OSCEN 15 VCC 14 GND 13 IINR 1 IIN2 2 IIN3 3 RFREQ 4 GND 5 GND 6 WEN3 7 21 PDIN 24 GND
February 13, 2001
24-Pin QSOP
24-Pin LPP Top View
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-ELANTEC or 408-945-1323 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Elantec (R) is a registered trademark of Elantec Semiconductor, Inc. Copyright (c) Intersil Americas Inc. 2002. All Rights Reserved
EL6243C
EL6243C
3-Channel Laser Diode Driver w/Oscillator & APC Amplifier
PRODUCT BRIEF
Effective May 15, 2002, Elantec, a leader in high performance analog products, is now a part of Intersil Corporation. All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
February 13, 2001
(R)
Sales Office Headquarters
NORTH AMERICA Intersil Corporation 7585 Irvine Center Drive Suite 100 Irvine, CA 92618 TEL: 949-341-7000 FAX: 949-341-7123 Elantec 675 Trade Zone Blvd. Milpitas, CA 95035 TEL: 408-945-1323 800: 888-ELANTEC FAX: 408-945-9305 EUROPE Intersil Europe Sarl Avenue William Fraisse 3 1006 Lausanne Switzerland TEL: +41-21-6140560 FAX: +41-21-6140579 ASIA Intersil Corporation Unit 1804 18/F Guangdong Water Bldg. 83 Austin Road TST, Kowloon Hong Kong TEL: +852-2723-6339 FAX: +852-2730-1433
Printed in U.S.A.
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