The ATLS201D is a series of high efficiency electronic modules designed for driving diode lasers with low noise constant current. It has high reliability, zero EMI (Electro- Magnetic Interference), and is packed in small DIP package.The series includes ATLS2A201D,ATLS3A201D ATLS4A201D, and ATLS6A201D. The output voltage range is from 0V to 4V when powered by a 5V power supply. The evaluation board introduced by this application note, ATLS201DEV1.0, is designed for evaluating these laser driver modules conveniently.
The evaluation board has a dummy laser formed by a series of regular laser diodes and can be used to emulate how the real laser diode would be driven by the laser driver. The output current and the output current limit can be programmed respectively by the potentiometers mounted on the board. This laser driver evaluation board is of 100 % lead (Pb)-free and RoHS compliant.
It is recommended to read this application note with the ATLS201D datasheet which provides more detail information about the specifications and application guidelines for the laser driver modules.
The main purpose of using the evaluation board is to drive a voltage configurable and unbreakable dummy laser diode by using the laser driver with a programmable current. The dummy laser on the board emulates the users’ expensive real laser diode so that in case there is a fault in the circuit or an improper operation, the real laser would not be damaged. After making sure the driver works properly and all the features and the set-values meet the requirements of the application, the users can disconnect the dummy laser from the driver by flipping a switch and connect a real diode laser onto proper connections of the board. At the same time, the user can set and monitor the output current, monitor the working status of the driver, etc.