A controller circuit for a set of light emitting diodes (LEDs) includes a linear current source, channel circuitry, and supervisor circuitry. The linear current source is configured to regulate a first current from a supply along a first series path to the set of LEDs. The channel circuitry is configured to control a second current from the supply along a second series path to the set of LEDs, the second series path being in parallel with the first series path and the second series path comprising a drop element coupled in series with the supply and the set of LEDs. The supervisor circuitry is configured to regulate a total current supplied to the set of LEDs using the linear current source and the channel circuitry, the total current comprising the first current and the second current.