The WS2821B is an intelligent, programmable constant current LED driver IC produced by World Semi Technology. It is ideal for use in electronic display and lighting applications, delivering improved efficiency and versatility even in the most demanding applications. This IC features an integrated Pulse-width Modulation (PWM) generator and 256-levels of dimming control. It provides stable current delivery and capability for daisy-chain configuration, allowing lighting designers to create efficient and modular lighting solutions. The WS2821B is highly energy efficient, consuming only 0.15 mA at a steady state and featuring a low current leeching mode, allowing for minimal power loss in off-state applications. Additionally, it is RoHS compliant, lead-free, and Halogen Free.