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 EL6204C is a push-pull oscillator used to reduce laser noise. It
uses the standard interface to existing ROM controllers. The fre-
quency and amplitude are each set with a separate resistor connected
to ground. The tiny package and harmonic reduction allow the part to
be placed close to a laser with low RF emissions. An auto turn-off fea-
ture allows it to easily be used on combo CD-RW plus DVD-ROM
pick-ups.
If the APC current is reduced such that the average laser voltage drops
to less than 1.1V, the output and oscillator are disabled, reducing
power consumption to a minimum.
The current drawn by the oscillator consists of a small utility current,
plus the peak output amplitude in the positive cycle. In the negative
cycle the oscillator subtracts peak output amplitude from the laser
APC current.
The EL6204C part is available in the space-saving 6-pin SOT23 pack-
age and is specified for operation from 0
C to +70
C.
Connection Diagram
1
2
3
6
5
4
6-Pin SOT23
IOUT
VDD
GND1
RFREQ
GND2
RAMP
Features
Low power dissipation
User-selectable frequency from
60MHz to 600MHz controlled
with a single resistor
User-specified amplitude from
10mA pk-pk to 100mA pk-pk
controlled with a single resistor
Auto turn-off threshold
Soft edges for reduced EMI
Small 6-pin SOT23 package
Applications
DVD players
DVD-ROM drives
CD-RW drives
MO drives
General purpose laser noise
reduction
Local oscillators
Ordering Information
Part No
Package
Tape & Reel
Outline #
EL6204CW
6-Pin SOT23
MDP0038
EL6204C - Product Brief
Laser Driver Oscillator
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EL6204C - 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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