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EL6203CW-T7A Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer EL6203CW-T7A
Beschreibung Laser Driver Oscillator
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 10 Seiten
EL6203CW-T7A Datasheet, Funktion
®
Data Sheet
October 4, 2004
EL6203
FN7218.2
Laser Driver Oscillator
The EL6203 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 pick-
ups.
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.
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.
This part is pin-compatible to the EL6201. It is superior to the
EL6201 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.
The part is available in the space-saving 5-pin SOT-23
package. It is specified for operation from 0°C to +70°C.
Pinout
EL6203
(5-PIN SOT-23)
TOP VIEW
1 VDD
RFREQ 5
2 GND
3 IOUT
RAMP 4
Features
• Low power dissipation
• User-selectable frequency from 60MHz to 600MHz
controlled with a single resistor
• User-specified amplitude from 10mAPK-PK to 100mAPK
controlled with a single resistor
• Auto turn-off threshold
• Soft edges for reduced EMI
• Small 5-pin SOT-23 package
Pb-free available as an option
Applications
• DVD players
• DVD-ROM drives
• CD-RW drives
• MO drives
• General purpose laser noise reduction
Ordering Information
PART NUMBER PACKAGE TAPE & REEL PKG. DWG. #
EL6203CW-T7 5-Pin SOT-23 7” (3K pcs) MDP0038
EL6203CW-T7A 5-Pin SOT-23 7” (250 pcs) MDP0038
EL6203CWZ-T7 5-Pin SOT-23 7” (3K pcs)
(See Note)
(Pb-free)
MDP0038
EL6203CWZ-T7A 5-Pin SOT-23 7” (250 pcs)
(See Note)
(Pb-free)
MDP0038
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020C.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.






EL6203CW-T7A Datasheet, Funktion
EL6203
Typical Performance Curves
VDD = 5V, TA = 25°C, RL = 10, RFREQ = 5.21k, RAMP = 2.54k, VOUT = 2.2V unless otherwise specified. (Continued)
95
90
85
80
75
70
65
60
-50
0 50 100
AMBIENT TEMPERATURE (°C)
150
FIGURE 13. PEAK-TO-PEAK OUTPUT CURRENT vs
TEMPERATURE
30
25
20
15
10
-50
0 50 100
AMBIENT TEMPERATURE (°C)
150
FIGURE 14. SUPPLY CURRENT vs TEMPERATURE
40mA
4.0ns
40mA
1.0ns
RFREQ=30.3k
RAMP=2.54k
FIGURE 15. OUTPUT CURRENT @ 60MHz
40mA
0.4ns
RFREQ=3.03k
RAMP=2.54k
FIGURE 17. OUTPUT CURRENT @ 600MHz
6
RFREQ=2.51k
RAMP=2.54k
FIGURE 16. OUTPUT CURRENT @ 350MHz
10
-10
-30
-50
-70
-90
340
344 348 352 356
FREQUENCY (MHz)
360
FIGURE 18. OUTPUT SPECTRUM-WIDEBAND

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