The UCCx813-x family of high-speed, low-power integrated circuits contain all of the control and drive functions required for off-line and DC-to-DC fixed-frequency current-mode switched-mode power supplies having minimal external parts count. The UCCx813-x family is a cost-reduced version of the UCCx80x family, with some relaxation of certain parameter limits. See Differences Between the UCC3813 and UCC3800 PWM Families for more information.
These devices have the same pin configuration as the UCx84x and UCx84xA families, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. The UCCx813-x devices are pin-out compatible with the UCx84x and UCx84xA families, however they are not plug-in compatible. In general, the UCCx813-x requires fewer external components and consumes less operating current.