The HP1010A is a highly flexible digital Power Factor  Correction (PFC) controller designed to drive a totem  pole PFC power stage.  Totem-pole PFC is composed of a fast-leg using the  third-generation semiconductor (GaN or SiC MOSFET)  switching at PWM frequency and a slow-leg operating  at the AC frequency. This design allows for a  considerable increase in efficiency and power density  by removing the diode bridge that is present at the  input of a traditional PFC circuit. The HP1010A offers RMS values of input voltage,  current, and power. Through the I2C and UART  interfaces, this information can be communicated to a  microcontroller. The HP1010A operates from a single 3.3 V supply.  The device is available in a 4 mm x 4 mm QFN-24L  package specified over an ambient temperature range  of −40°C to +125°C.