A power-limit circuit can be added to the circuit in Fig. 1 to limit the overall power when there is a large voltage variation for parallel strings of LEDs, with the result shown in Fig. 2.

Two drivers in parallel provide twice as much current and split power loss into two locations, which makes for easier heat dissipation.

GCSE WJEC Electric circuits – WJEC Resistors in series and parallel Engineers connect components in electrical circuits in series or parallel to make a range of useful circuits. We can calculate ...