LED Controller Connects Wireless Bulbs To Existing Wall Dimmers

The 88EM8189, a new ac/dc LED driver IC from Marvell, features an integrated I2C compatible digital interface for connecting with a networking microcontroller to provide a full digital dimming range from 100% to 1% through ZigBee, Wi-Fi, Bluetooth, PLC and other technologies. The chip also integrates a separate high efficiency ac to dc power supply circuit providing ENERGY STAR-rated standby power (500 mW) dedicated to the networking chip. Smart bulbs using the intelligent chip are backward compatible with existing phase cut wall dimmers as a system level option, and the IC can also be used in either Buck-Boost (non-isolated) or Flyback (isolated) design topologies. The LED driver is part of Marvell’s Smart Lighting Platform which includes 88MZ100 ZigBee microcontroller, 88MC200 Wi-Fi microcontroller and a ZigBee-to-Wi-Fi gateway solution. The platform fully supports industry open protocols in ZigBee Home Automation and ZigBee Light Link, and is accessible by mobile devices via Wi-Fi. The open architecture also allows the Smart bulb to be connected to home gateways offered by retailers and service providers. The 88EM8189 LED driver is currently sampling with global customers.

MARVELL