UCC28500NG4

的BiCMOS PFC / PWM组合控制器 BiCMOS PFC/PWM COMBINATION CONTROLLER

DESCRIPON

The UCC2850x family provides all of the control functions necessary for an active power-factor

corrected preregulator and a second-stage dc-to- dc converter. The controller achieves near-unity power factor by shaping the ac input line current waveform to correspond to the ac input-line voltage using average current-mode control. The dc-to-dc converter uses peak current-mode control to perform the step-down power conversion.