ELANT EL6272CY Datasheet

EL6272C - Product Brief

1-Ch Laser Diode Driver + Oscillator

EL6272C - Product Brief

Features

• Voltage-controlled output current

source (requiring one external set
resistor)

• Current-controlled output current

source.

• Rise time = 3.0 ns typ.

• Fall time = 3.5 ns typ.

• On-chip oscillator w/frequency

and amplitude control by use of
external res istors to ground.

• Oscillator to 500 MHz typ.

• Oscillator to 100 mA pk /pk typ.

• Single +5V supply (±10%)

• Current amplification = 100

• TTL/CMOS control signals

Applications

• MO drives

• Mini-Disc drives

• Writable optical drives

• Laser diode current switching

Ordering Information

Part No Temp. Range Package Outline #

EL6272CY 0°C to +70°C MSOP10 MDP0043

General Description

The EL6272C is a single channel laser diode current amplifier that
provides controlled current to a grounded laser diode. The amplif ier
can provide up to 200 mA of DC or pulsed current with switching
speeds of approximately three nanoseconds rise/fall time. The level of
the output current is set by a n analog voltage app lied to an external
resistor which converts the voltage into a current at the I

pin (virtu-

IN

ally ground). The current seen at this pin is then amplified by 100X to
become a cur r e nt s o u r ce at pin I

OUT

.

An on-chip 500 MHz oscillator is provided to allow current modula­tion when in read mode. This is turned on when the OSCEN pin is h eld
high. Complete control of amplit ude and freque ncy is set by two exter­nal resistors connected to ground at pins RFREQ and RAMP (see
graphs in this data sheet for further explanation).

Output write current p ulses are enable d when an ‘L’ signal is applied
to the OUTEN

pin.

The external resistor allows the user to accurately and independently
set the amplifier transconductance by applying a voltage to the set
resistor, without restriction on the voltage range, thus ensuring broad
voltage DAC compatibility. Alternatively, the I

pin can be biased

IN

from a current DAC or other current source.

Connection Diagram

Complete Product Specifications

Elantec Technical Support:

North America: 1-888- 352-6832 X 311
Asia: [phone]
Europe: [phone]

©2000 Elantec Semiconductor, I nc.

ENABLE

1

I

2

IN

RFREQ

3

OUTEN

4

OSCEN

5 6

V

10

CC

I

9

OUT

GND

8

RAMP

7

V

CC

January 31, 2000

EL6272C - Product Brief

1-Ch Laser Diode Driver + Oscillator

EL6272C - Product

General Disclaimer

Specifications contained in this product brief are in effect as of the publication date shown. Elantec Semiconductor, Inc. reserves the right to make
changes in the circuitry or specifications contained herein at any time without notice. Elantec Semiconductor, 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 Semiconductor, Inc. products are not authorized for and
should not be used within Life Support Systems without the specific
written consent of Elantec Semiconductor, Inc. Life Support sys-

Elantec Semiconductor, Inc.

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

[phone] (toll free)
Fax: [phone]
European Office: 44-18-977-6020
Japan Office: 85-45-682-5820

tems are equipment intended to support or sustain life and whose
failure to perform when prop erly used in accordance wi th instruc­tions provided can be reasonably expected to result in significant
personal injury or death. Users contemplating application of Elantec
Semiconductor, Inc. Products in Life Support Systems are requested
to contact Elantec Semiconductor, Inc. factory headquarters to
establish suitable terms & conditions for these applications. Elantec
Semiconducto r, Inc. ’s warranty is limited to replacem ent of defec­tive components and does not cover injury to persons or property or
other consequential damages.

January 31, 2000

2

Printed in U.S.A.