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