The Chestnut Display Driver/Boost IC features a built-in high-performance boost regulator. Unused diodes are disabled by connecting them to ground. The boost output automatically adjusts its voltage to the forward voltage of the WLED to improve efficiency. This boost driver/lighting driver supports multiple brightness adjustment methods. It is also known as: Chestnut Display Driver / Boost IC. Compatible with models: A2221, A2111, A2223, A1984, A2105, A2106, A2107, A2108.