Datasheet EL6283CU Datasheet (ELANT)

EL6283C - Product Brief

3-Channel Laser Diode Driver w/Oscillator & APC Amplifier

EL6283C - Product Brief

Features

• Shrink-Small Outline Package

• Voltage-controlled output current

source to 200mA per channel,
requiring one external set resistor
per channel

• Current-controlled output current
source to 200mA per channel

• Rise time = 0.8ns

• Fall time = 0.8ns

• On chip oscillator with frequency

and amplitude control by use of
external res istors to ground

• Oscillator to 500MHz

• Oscillator to 100m A pk/p k

• Single +5V supply (±10%)

• Disable feature for power-up

protection and power savings

• Fast Settling APC Amplifier

Applications

• CD-RW applications

• Writable optical drives

• Laser diode current switching

Ordering Information

Part No Temp. Range Package Outline #

EL6283CU 0°C to +70°C QSOP-16 MDP0041

General Description

The EL6283C is a high-performance three channel las er driver that
provides contr olled curr ent t o a g rounde d la ser di ode. Write chann els
2 and 3 can provi de up to 200 mA per chann el of DC or pu lse d curr en t,
with switching speeds of approximately one nanosecond rise/fall time.
All three channels are summed together at the I

output, allowing

OUT

the user to create multilevel waveforms in order to optimize laser
diode performance . T he le vel of t h e ou tput cu rrent is set by an an alog
voltage applied to an external resistor which converts the voltage into
a current at the I
is then amplified to become a current source at pin I

pin (virtually ground). The current seen at this pin

IN

OUT

.

An on-chip 500MHz oscillator is provided to allow output current
modulation when in any m ode. This is turned on when the OSCE N pin
is held high. Complete cont rol of amplitud e and frequency is set by
two external resistors connected to ground at pins RFREQ and RAMP
(see graphs in this data sheet for further expl anation).

Output current pulses ar e enabl ed whe n an ‘L’ signal is applied to the
OUTEN pin. No output current flows when OUTEN is ‘H’, and addi­tional laser diode protection is provided since the OUTEN input will
float high when open. Complete I

shut-off is also achieved by

OUT

holding the ENABLE pin low, which will override all oth er control
pins.

The EL6283C also includes a fast settling APC amplifi er designed to
interface directly with the front end monitor diode and the sample­and-hold amplifier for read and write power control. Its 100MHz
bandwidth and 30ns settling time enable up to 16X CD-RW design.

Connection Diagram

1

VOUT PDIN

2

VREF VCC

3

IINR IOUT

4

RFREQ GND

5

IIN2

6

7

OUTEN3 OSCEN

8 9

OUTEN2 VCC

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 . W e recommend checking the revision level befo re finalization of your design documentation.

© 2000 Elantec Semiconductor, Inc.

ENABLEIIN3

RAMP

16

15

14

13

12

11

10

September 28, 2000

EL6283C - Product Brief

3-Channel Laser Diode Driver w/Oscillator & APC Amplifier

EL6283C - Product

General Disclaimer

Specifications contained in this data sheet are in effect as of the publicat ion date shown. Elantec, Inc. re serves the r ight to make changes in th e cir­cuitry or specifications cont ained herein at a ny time without notice. Elantec , Inc. assumes no res ponsibili ty for t he us e of an y circuits descr ibed
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 intend ed to sup-

Elantec Semiconductor, Inc.

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

Fax: [phone]
European Office: [phone]
Japan Technical Center: [phone]

September 28, 2000

(888) ELANTEC

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 applicatio n of Elantec, Inc. P roducts in Li fe 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 cov er injury to persons or prop erty or
other consequential damages.

2

Printed in U.S.A.