Laser diode driver

Thread Starter

drakedog2

Joined Sep 24, 2014
17
Hello everyone. I am confusing about the laser diode driver.
The datasheet of laser driver: https://www.ichaus.de/upload/pdf/WK__WKL_datasheet_D2en.pdf
The LDA is connected to LD anode and LDK is connected to LD cathode. After switching on, the voltage of LDA increases from 0 to 5V.
I think the current should from from LDA to LDK or LD anode to LD cathode. But on page 5 of datasheet, it shows that current in LDA is from -95 to 10mA and current in LDK is from -10 to 95mA. I am confused.
Appreciate any reply
 

michael8

Joined Jan 11, 2015
191
Is this the section on page 5 which says "ABSOLUTE MAXIMUM RATINGS" and "No Destruction, correct function not guaranteed"? If so, then it's just the values to stay inside of to avoid device distruction, not normal operating conditions.
 

Thread Starter

drakedog2

Joined Sep 24, 2014
17
Thank you for reply. the absolute maximum ratings indicate that the pin can tolerate. But why is the range of current LDA from -95 to 10mA?
 
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