LED driver with power module offers an adjustable current

Available from Digi-Key, the DNS14 from Wurth Electronics is a reference design for the WLMDU9456008T LED driver that is capable of driving up to 1.5A output current using a voltage regulated module and an external secondary regulation loop to establish current regulation. The external loop regulates a DC-output current which results in a constant photon flow. Compared to other solutions with PWM, this solution is less harmful to the eyes due to the constant photon flow, allowing the pupil opening to be the proper size for the light intensity emitted. Depending on the LED flux voltage, up to four LEDs in a series can be connected.