ELANT EL6205CW Datasheet

EL6205C - Product Brief

Laser Driver Oscillator

EL6205C - Product Brief

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

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 oscil­lator are disabled. The part is available in the space-saving 6-pin SOT23

package. It is specified for operation from -0°C to 70°C.

Connection Diagram

1

IOUT RFREQ

2

VDD GND2

3

GND1 IN

EL6205C

(6-Pin SOT23)

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.

6

5

4

September 27, 2001

EL6205C - Product Brief

Laser Driver Oscillator

EL6205C - Product Brief

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.

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-

Elantec Semiconductor, Inc.

675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: [phone]

(888) ELANTEC
Fax: [phone]
European Office: [phone]
Japan Technical Center: [phone]

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 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.

September 27, 2001

2

Printed in U.S.A.