This series laser drivers/controllers are designed for driving laser diodes with low noise current, 20A, 30A, 40A or 45A at high efficiency, > 76%. The laser driver/controller's output current can be set by an analog voltage of 0 to 2.5V, or a potentiometer, to between 0 and 20A, 30A, 40A or 45A. The laser driver/controller is of 100 % lead (Pb)-free and RoHS compliant.http://www.analogti.com/laser-control/ac-laser-driver.html