ATR0807 판매점 - THREE CHANNEL LASER DRIVER

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Features

• Current-controlled Output Current Source with 3 Input Channels

• Two Selectable Outputs for Grounded Laser Diodes

• Output Current per Write Channel: 350 mA

• Total Output Current: 500 mA

• 500 Ω Channel Input Resistance

• On-chip RF Oscillator

• Control of Two Different Swings by Use of Two External Resistors

• Oscillator Frequency Range from 200 MHz to 500 MHz

• Oscillator Swing: 100 mA

• Single 5 V Power Supply

• Common Enable/Disable Input

• TTL/CMOS Control Signals

• Small Pb-free QFN16 (4 mm x 4 mm) or SSO16 Package

Applications

• DVD-ROM with CD-RW Capability

• DVD+RW with CD-RW Capability

• DVD-RW with CD-RW Capability

• Writable Optical Drives

Three Channel

Laser Driver

with RF

Oscillator and

Two Outputs

ATR0807

Description

The ATR0807 is a laser diode driver for the operation of two different grounded laser

diodes for DVD-RW/DVD+RW (650 nm) and CD-RW (780 nm). It includes three chan-

nels for three different optical power levels which are controlled by a separate IC. The

read channel generates a continuous output level, whereas the channels 2 and 3 are

provided as write channels with very fast switching speeds. Write current pulses are

enabled when a low signal is applied to the NE pins. All channels are summed

together and switched to one of the two IOUTA or IOUTB outputs by the select input

SELA. Each write channel (channel 2 and 3) can contribute up to 350 mA to the total

output current, up to 500 mA. The read channel can contribute up to 150 mA. Total

gains of 100 (read channel), 250 (channel 2 and 3) are provided between each refer-

ence current input and the selected output. Although, the reference inputs are current

inputs, voltage control is possible by using external resistors. An on-chip RF oscillator

is provided to reduce laser mode hopping noise during read mode. Swing can be set

independently for the two selectable outputs with two different resistors. Oscillation is

enabled by a high signal at the ENOSC pin. Complete output current and oscillator

switch-off is achieved by a low signal at the ENABLE input.

(Summary)

Rev. 4723CS–DVD–07/03

ATR0807 반도체 회로 부품 판매점

THREE CHANNEL LASER DRIVER

국내 전력반도체 판매점

일반적인 전자부품 판매점

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