The UCC2803D is a low-power BiCMOS current-mode Pulse Width Modulation (PWM) Controller contains all of the control and drive components required for off-line and DC to DC fixed frequency current-mode switching power supplies with minimal parts count. It offers the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. It has the same pin configuration as the UC2842/3/4/5 family and also offers the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. It offers choice of maximum duty cycle and critical voltage levels.
DESCRIPTION The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching power supplies with minimal parts count. FEATURES •100µA Typical Starting Supply Current •500µA Typical Operating Supply Current •Operation to 1MHz •Internal Soft Start •Internal Fault Soft Start •Internal Leading-Edge Blanking of the Current Sense Signal •1 Amp Totem-Pole Output •70ns Typical Response from Current-Sense to Gate Drive Output •1.5% Tolerance Voltage Reference •Same Pinout as UC3842 and UC3842A