STMicroelectronics has announced a power-factor correction controller for the front-end of ac-dc PSUs from 600W to 6kW. Called STNRGPF02, it implements a two-channel interleaved boost topology as well as in-rush current limiting. Operation is fixed-frequency continuous-conduction mode (CCM) with average current-mode control. “A blend of analogue and digital control combines a hardware analogue PI [proportional-integral] ...

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