The BL6552 is an energy metering IC manufactured by Belling. It is in a QFN-36-EP (6x6) package that is RoHS compliant. It is used for measuring and monitoring energy consumption in mains electricity systems. The BL6552 offers precision energy metering with auto calibration and compensation of load variations. It offers a wide range of features such as programmable thresholds, power factor correction, and energy accumulations. It also features over-temperature and short-circuit protection, which helps provide a robust package for energy metering applications.