HR1215GY-xxxx-Z

The HR1215 is a multi-mode PFC and current mode LLC combo controller that is configurable via the UART interface. Power-saving technology optimizes efficiency across the entire operating range. The PFC controller employs a patented, digital average current control scheme to achieve hybrid continuous conduction mode (CCM) and discontinuous conduction mode (DCM). At heavy loads, CCM reduces the peak MOSFET current so that the controller can be used across a wider load range. At light loads, DCM reduces the switching frequency (fSW) for improved efficiency. Burst mode has configurable, digital soft switching that can improve both light-load efficiency and audible noise. Current mode control is implemented in the LLC stage for improved system stability and fast transient response. Three operation modes are implemented based on the different load conditions: steady state, skip mode, and burst mode. This allows different load conditions to be optimized independently for improved efficiency. At light loads, digital, frequency-controlled burst mode is applied to reduce both switching power loss and audible noise. Adaptive dead-time adjustment (ADTA) and capacitive mode protection (CMP) are also applied to guarantee zero-voltage switching (ZVS) without capacitive mode. The HR1215 has an internal, high-voltage (HV) current source for start-up. This means that a traditional start-up resistor or external circuit is not required. The HV current source can be implemented as an X-capacitor discharger while the AC input is in dropout, so a capacitor resistor is not required. Full protection features include thermal shutdown, open-loop protection (OLP), over-voltage protection (OVP), over-current limit (OCL), over-current protection (OCP), SO pin protection, and over-power protection (OPP). The HR1215 is available in an SOIC-20 package.