Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a "controlled document". Current revisions, if any, to these
specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.
2001 Elantec Semiconductor, Inc.
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Features
Complete programmable laser
diode driver
250mA maximum output
8bit x 8bit multiplying DAC output
provides 8bit full scale adjustment
and 8bit resolution at any full scale
output
0.17 nsec timer resolution
Two laser outputs allows
read/write DVD and CD
combinations
Programmable waveform values
support 2.6GB DVD-RAM, 4.7GB
DVD-RAM, DVD-R, DVD+RW,
DVD-RW, CD-RW, and CD-R
Analog input supports APC
HFM oscillator programmable to
100mA
P-P
from 200MHz to
600MHz
PLL allows reduced-frequency
clock on flex cable
Separate serial input works up to
25Mb/sec
Applications
Combination DVD writable and
CD writable drives
DVD camcorders
DVD video recorders
Ordering Information
Part No
Temp. Range
Package
Outline #
EL6291CY
0C to +70C
32-Pin QFN
MDP0045
EL6291CL
0C to +70C
32-Pin LPP
MDP0046
General Description
The EL6291C is a highly integrated laser diode driver designed to sup-
port multi-standard writable optical drives. It accomplishes this by
incorporating a waveform generator wherein the diode currents and
timing details can be programmed before operation. The data input cir-
cuitry inspects the NRZ serial data waveform and generates
programmed waveforms in recognition of 3, 4, 5, or 6 or more clock
periods of space changing to 3, 4, 5, or 6 or more clock periods of
mark, and vice versa.
This programmable architecture allows reprogramming of the timers
to support different media, DVD or CD standards, and different
speeds. The programming is accomplished through a serial interface
port. Two outputs are provided to support dual-laser multi-standard
optical heads.
The EL6291C requires 3.3V and 5V supplies, with all the logical
interface operating on the 3.3V supply.
The EL6291C is available in 32-pin LPP and 32-pin QFN packages
for improved thermal performance and reduced footprint.
Connection Diagram
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Thermal Pad
CLK
NRZ
VSL
GND
GND
NC
VSL
VSO
OUT1
OUT1
GND
VSO
VSO
OUT2
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OUT2
VSO
VSA
RFREQ
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32-Pin LPP Top View
EL6291C - Product Brief
Laser Diode Driver with Waveform Generator
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EL6291C - Product Brief
Laser Diode Driver with Waveform Generator
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General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir-
cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described
herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec, Inc. products are not authorized for and should not be used
within Life Support Systems without the specific written consent of
Elantec, Inc. Life Support systems are equipment intended to sup-
port or sustain life and whose failure to perform when properly used
in accordance with instructions provided can be reasonably
expected to result in significant personal injury or death. Users con-
templating application of Elantec, Inc. Products in Life Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elan-
tec, Inc.'s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
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Printed in U.S.A.
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ELANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6020
Japan Technical Center: +81-45-682-5820
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