Suppose I have a voltage regulator acting as a high-power current source (basically a constant-current driver), with a resistor to set the output current. This drives 27 high-brightness white LEDs, arranged as 9 series chains, with 3 LEDs per series chain (9.6V6 V min at 20mA20 mA).
Do I need to put resistors on every series chain, or is this not necessary for enforcing current sharing?
simulate this circuit – Schematic created using CircuitLab