155 MHz LASER SWITCH

Rev F1, Page 1/8

FEATURES

o Laser switch for frequencies from CW up to 155 MHz

o Spike-free switching of the laser current

o Dual switching inputs with independent current control

o Operates as a voltage-controlled current source

o Pulsed operation with up to 700 mA per channel

o CW operation with up to 150 mA per channel

o Simple power control at pin CI

o Control to the mean of the laser power in conjunction with

iC-WK/L (CW laser diode driver)

o Supplement to iC-WK/L for pulsed operation

o Thermal shutdown

o Protective ESD circuitry

o iC-HKB for driving blue laser diodes

o Option: extended temperature range

APPLICATIONS

o Data transmission

o Laser scanning devices

o Optical storage devices

PACKAGES

SO8

thermal pad

MSOP8

thermal pad

BLOCK DIAGRAM

2

5

7

Suitable laser diode configurations:

N

LD

MD LD

MD

LD

OVERTEMP.

SHUTDOWN

iC−HK/B

CI

LDK

EN1

EN2

AGND2

AGND1

GND

8

3

1

5

4

2

6

VDD

7

MD LD

RK1

RK2

CI

CLDA

RM

MD

M

P

M2

M1

LDA

MDA

CI

iC−WK

LD

Operation with constant

current (uncontrolled):

Operation in conjunction with

iC−WK (power controlled):

4

MDK

P

M/N

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