The HP1012 is a highly flexible digital Power Factor  Correction (PFC) controller designed to drive the totem pole  PFC power stage.  A fast-switching leg driven at the PWM switching  frequency and a second leg that runs at the AC line  frequency make up the totem pole PFC. 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 HP1012 offers precise input voltage, current, and power  measurement at rms. Through the I²C, this information can  be communicated to microcontroller.  The HP1012 requires independent power supply for VDD  and VCC. The devices are available in 7.8 mm x 8.2 mm  SSOP-24L package that is specified over an ambient  temperature range of −40°C to +125°C.