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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General Description
The EL6205C consists of a variable amplitude, push only, oscillator
that also supplies the laser DC current. It is designed to easily interface
to existing ROM controllers, reducing parts count, and power
dissipation.
The reduction of parts count and the small package allows the oscillator
to be placed closer to the laser, thus reducing EMI. Also, the turn-on
and turn-off edges are slew rate limited to reduce higher harmonics.
The total current drawn from the power supply can be less than the laser
threshold current due to the unique push-only modulation method. The
average current is less than the peak oscillator current, and can be less
than half of the oscillator current. The power control current supplied
from the main board is reduced from many tens of mA to less than
2mA.
One external resistor sets the oscillator frequency. A current applied to
the IIN terminal determines the amplitude of the oscillator and laser DC
current. If the oscillator amplitude is set very low, the output and oscil-
lator are disabled. The part is available in the space-saving 6-pin SOT23
package. It is specified for operation from -0
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C.
Connection Diagram
1
2
3
6
4
EL6205C
(6-Pin SOT23)
IOUT
RFREQ
VDD
GND2
GND1
IN
5
Features
Low power dissipation
Reduced parts count from the
conventional solution
User-selectable frequency from
60MHz to 600MHz controlled
with a single resistor
User-selectable amplitude from
10mA pk-pk to 100mA pk-pk
controlled by 0.2mA to 2mA input
current
Auto turn-off threshold
Soft edges for reduced EMI
Small 6-pin SOT23 package
Applications
DVD players
DVD-ROM drives
Combo drives
MO drives
General purpose laser noise
reduction
Local oscillator capability
Ordering Information
Part No.
Package
Tape & Reel
Outline #
EL6205CW
6-Pin SOT23
MDP0038
EL6205C - Product Brief
Laser Driver Oscillator
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EL6205C - Product Brief
Laser Driver Oscillator
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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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