Circuit Ideas: How to Parallel LED Current Drivers. Feb. 21, 2008. As white LEDs become more pervasive, there are ever-more options for driving them. Edited by Leland Teschler.

The Fig. 1 example includes LED loads D1 + D2, D3 + D4, D5 + D6 and a power-supply output voltage, with a constant output current, providing the circuit input voltage (V IN).