Laser Driver Oscillator
General Description
• 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
The EL6204C is a push-pull oscillator used to reduce laser noise. It
uses the standard interface to existing ROM controllers. The frequency 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 feature allows it to easily be used on combo CD-RW plus DVD-ROM
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.
DVD players
DVD-ROM drives
CD-RW drives
MO drives
General purpose laser noise
• Local oscillators
6-Pin SOT23
Tape & Reel
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 EL6204C part is available in the space-saving 6-pin SOT23 package and is specified for operation from 0°C to +70°C.
Ordering Information
Part No
EL6204C - Product Brief
EL6204C - Product Brief
Connection Diagram
Outline #
GND2 5
3 GND1
6-Pin SOT23
October 24, 2001
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.
EL6204C - Product Brief
EL6204C - Product Brief
Laser Driver Oscillator
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 circuitry 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.
October 24, 2001
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 support 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 contemplating 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. Elantec, Inc.’s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(408) 945-9305
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