The WS9821B S7P with SOP-7 LED Drivers ROHS is an IC manufactured by Winsemi. It is a 24-bit constant current LED driver, offering up to 8 current sinks for RGB LEDs and a power up/down control as well as PWM dimming support for color LED sets. The maximum peak current it can carry is 150mA, while its total adjustable current is 12mA. The voltage range is 2.3V to 5.5V. It is an RoHS-compliant, low-voltage, constant-current LED driver with built-in OVP, OCP, and SCP protection. It is perfect for LED lighting applications, such as LED-backlit displays, displays, indicators, and other lighting systems.