NZQFN28 datasheet(8/20 Pages) ROITHNER

8 / 20 page

iC-NZ

FAIL-SAFE LASER DIODE DRIVER

Rev B2, Page 8/20

CONTENTS

DESCRIPTION OF FUNCTIONS

Monitoring the laser current . . . . . . . . . .

Demo board . . . . . . . . . . . . . . . .

Switching up to three laser power levels . . .

1. Enabling the system . . . . . . . . . . . . .

Demo board . . . . . . . . . . . . . . . .

Possible sources of error

. . . . . . . . . . .

2. Calibrating the low and middle channels

Setting the low output level . . . . . . . . . .

Demo board . . . . . . . . . . . . . . . .

Setting the middle channel

. . . . . . . . . .

Demo board . . . . . . . . . . . . . . . .

3. Calibrating the high channel . . . . . . . .

Demo board . . . . . . . . . . . . . . . .

Possible sources of error

. . . . . . . . . . .

Demo-Board . . . . . . . . . . . . . . . . . .

Warning!

. . . . . . . . . . . . . . . . . . . .

OPERATION WITH ONE OR TWO CHANNELS

SINGLE-FAILURE PROTECTION

Calibrating the safety monitor diode

. . . . .

Demo-Board . . . . . . . . . . . . . . .

Operation without a second monitor diode . .

Demo-Board . . . . . . . . . . . . . . .

MISCELLANEOUS

Status outputs NERR, NSF and REGEN . . .

Controlled burst mode . . . . . . . . . . . . .

Extending the laser current . . . . . . . . . .

Driving blue laser diodes . . . . . . . . . . . .

DEMO BOARD

NZQFN28 Datasheet(PDF) 8 Page - Roithner LaserTechnik GmbH