IC-NZ Datasheet, PDF (8/20 Pages) IC-Haus GmbH – FAIL-SAFE LASER DIODE DRIVER

iC-NZ
FAIL-SAFE LASER DIODE DRIVER
CONTENTS
Rev B2, Page 8/20
DESCRIPTION OF FUNCTIONS
9
Warning! . . . . . . . . . . . . . . . . . . . . 12
Monitoring the laser current . . . . . . . . . .
Demo board . . . . . . . . . . . . . . . .
9
9 ^{OPERATION WITH ONE OR TWO CHANNELS 12}
Switching up to three laser power levels . . . 9
SINGLE-FAILURE PROTECTION
15
1. Enabling the system . . . . . . . . . . . . . 10
Calibrating the safety monitor diode . . . . . 15
Demo board . . . . . . . . . . . . . . . . 10
Demo-Board . . . . . . . . . . . . . . . 15
Possible sources of error . . . . . . . . . . . 10
Operation without a second monitor diode . . 15
2. Calibrating the low and middle channels . 10
Demo-Board . . . . . . . . . . . . . . . 15
Setting the low output level . . . . . . . . . . 10
Demo board . . . . . . . . . . . . . . . . 10 _{MISCELLANEOUS}
17
Setting the middle channel . . . . . . . . . . 10
Status outputs NERR, NSF and REGEN . . . 17
Demo board . . . . . . . . . . . . . . . . 11
Controlled burst mode . . . . . . . . . . . . . 17
3. Calibrating the high channel . . . . . . . . 11
Extending the laser current . . . . . . . . . . 17
Demo board . . . . . . . . . . . . . . . . 11
Driving blue laser diodes . . . . . . . . . . . . 19
Possible sources of error . . . . . . . . . . . 11
Demo-Board . . . . . . . . . . . . . . . . . . 12 DEMO BOARD
19