1

®

FN7229

EL6224

3-Channel Laser Diode Driver w/

Oscillator

The EL6224 is a high performance

three-channel laser driver that

provides controlled current to a

grounded laser diode. Channels 2 and 3 should be used as

the write channels, with switching speeds of approximately

one nanosecond rise/fall time. All three channels are

create multilevel waveforms in order to optimize laser diode

performance. The level of the output current is set by an

analog voltage applied to an external resistor which converts

current seen at this pin is then amplified to become a current

An on-chip 600MHz oscillator is provided to allow output

current modulation when in any mode. This is turned on

when the OSCEN pin is held high. Complete control of

amplitude and frequency is set by two external resistors

in this datasheet for further explanation).

Output current pulses are enabled when 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.

ENABLE pin low, which will override all other control pins.

The external resistors allow the user to accurately and

independently set each amplifier transconductance by

applying a voltage to each resistor, without restriction on the

voltage range, thus ensuring broad voltage DAC

current DAC or other current source.

Features

• "Shrink-Small" outline package

• Voltage-controlled output current source requiring one

external set resistor per channel

• Current-controlled output current source

• CH2 to 300mA max

• CH3 to 150mA max

• Rise time = 0.8ns

• Fall time = 0.8ns

• On-chip oscillator with frequency and amplitude control by

use of external resistors to ground

• Oscillator to 600MHz

• Single +5V supply (±10%)

• Disable feature for power-up protection and power

savings

Applications

• CD-RW applications

• Writable optical drives

• Laser diode current switching

Ordering Information

PART

NUMBER

PACKAGE

TAPE & REEL PKG. DWG. #

EL6224CU

16-Pin QSOP

-

MDP0040

EL6224CU-T7

16-Pin QSOP

7”

MDP0040

EL6224CU-T13 16-Pin QSOP

13”

MDP0040

Data Sheet

June 16, 2004

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Copyright © Intersil Americas Inc. 2002-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.

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