UCC3803 - Texas Instruments

UCC3803 Low-Power BiCMOS Current-Mode PWM Controllers

The UCCx80x 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 mode power supplies with minimal parts count. These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle sof.

Features

•1 100-μA Typical Starting Supply Current
• 500-μA Typical Operating Supply Current
• Operation up to 1 MHz
• Internal Soft Start
• Internal Fault Soft Start
• Internal Leading-Edge Blanking of the Current Sense Signal
• 1-A Totem-Pole Output
• 70-ns Typical Response from Current-Sense to Gate Drive Output
• 1.5% Tolerance Voltage Reference
• Same Pinout as UC3842 and UC3842A 2 Applications
• Switch Mode Power Supplies (SMPS)
• DC-to-DC Converters
• Power Modules
• Industrial PSU
• Battery-Operated PSU 3 Description The UCCx80x family of high-speed, low-power integrated circuits contain all o.