EL6205C Datasheet, PDF (1/2 Pages) Elantec Semiconductor – Laser Driver Oscillator

EL6205C - Product Brief
Laser Driver Oscillator
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
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°C to 70°C.
Connection Diagram
Ordering Information
Part No.
EL6205CW
Package
6-Pin SOT23
Tape & Reel
Outline #
MDP0038
1 IOUT
RFREQ 6
2 VDD
GND2 5
3 GND1
IN 4
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.