EL6203C - Product Brief
Laser Driver Oscillator
Features
General Description
• Low power dissipation
The EL6203C 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.
• User-selectable frequency from
60MHz to 600MHz controlled
with a single resistor
• User-specified amplitude from
10mA pk-pk to 100mA pk
controlled with a single resistor
• Auto turn-off threshold
• Soft edges for reduced EMI
• Small 5-pin SOT23 package
One external resistor sets the oscillator frequency. Another external
resistor sets the oscillator amplitude. 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.
Applications
• DVD players
• DVD-ROM drives
• CD-RW drives
• MO drives
The current drawn by the oscillator consists of a small bias 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.
• General purpose laser noise
reduction
This part is pin-compatible to the EL6201C. It is superior to the
EL6201C in several ways: It has up to 100mA output capability, it is
more power-efficient, it has less harmonic content, and it has an auto
shut-off feature activated at 1.1V.
Ordering Information
The part is available in the space-saving 5-pin SOT23 package. It is
Part No
Package
Tape & Reel
Outline #
specified for operation from -0°C to 70°C.
EL6203CW
5-Pin SOT23
MDP0038
Connection Diagram
1
2
3
VDD
GND
IOUT
RFREQ
RAMP
5
4
5-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.
ELANTEC [ ELANTEC SEMICONDUCTOR ]
