ELANT EL6291CY, EL6291CL Datasheet

EL6291C - Product Brief

Laser Diode Driver with Waveform Generator

EL6291C - Product Brief

Features

• Complete programmable laser
diode driver

• 250mA maximum output

• 8bit x 8bit multiplying DAC output
provides 8bit full scale adjustment
and 8bit resolution at any full scale
output

• 0.17 nsec timer resolution

• Two laser outputs allows
read/write DVD and CD
combinations

• Programmable waveform values
support 2.6GB DVD-RAM, 4.7GB
DVD-RAM, DVD-R, DVD+RW,
DVD-RW, CD-RW, and CD-R

• Analog input supports APC

• HFM oscillator programmable to
100mA

from 200MHz to

P-P

600MHz

• PLL allows reduced-frequency
clock on flex cable

• Separate serial input works up to
25Mb/sec

Applications

• Combination DVD writable and
CD writable drives

• DVD camcorders

• DVD video recorders

General Description

The EL6291C is a highly integrated laser diode driver designed to sup­port multi-standard writable optical drives. It accomplishes this by
incorporating a waveform generator wherein the diode currents and
timing details can be programmed before operation. The data input cir­cuitry inspects the NRZ serial data waveform and generates
programmed waveforms in recognition of 3, 4, 5, or 6 or more clock
periods of space changing to 3, 4, 5, or 6 or more clock periods of
mark, and vice versa.

This programmable architecture allows reprogramming of the timers
to support different media, DVD or CD standards, and different
speeds. The programming is accomplished through a serial interface
port. Two outputs are provided to support dual-laser multi-standard
optical heads.

The EL6291C requires 3.3V and 5V supplies, with all the logical
interface operating on the 3.3V supply.

The EL6291C is available in 32-pin LPP and 32-pin QFN packages
for improved thermal performance and reduced footprint.

Connection Diagram

R/W

SCLK

SDIO

SEN

BUSY

VSL

MON

27

26

25

VSO

24

OUT1

23

OUT1

22

GND

CLK

NRZ

VSL

GND

32

31

30

29

28

1

2

3

4

5

Ordering Information

Part No Temp. Range Package Outline #

EL6291CY 0°C to +70°C 32-Pin QFN MDP0045

EL6291CL 0°C to +70°C 32-Pin LPP MDP0046

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.

GND

VSL

VSA

RFREQ

6

NC

7

8

9

10

RSET

Thermal Pad

11

12

13

NC

IAPC

GND

32-Pin LPP Top View

14
GND

21

VSO

20

VSO

19

OUT2

18

OUT2

17

VSO

15

16
L/G

ENA

October 12, 2001

EL6291C - Product Brief

Laser Diode Driver with Waveform Generator

EL6291C - 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.

October 12, 2001

2

Printed in U.S.A.