UCC2813D-2

The UCC3813-x device family of high-speed, lowpower integrated circuits contains all of the control
and drive components required for off-line and DC-toDC fixed-frequency current-mode switching power
supplies with minimal parts count.
These devices have the same pin configuration as
the UC384x device family, and also offer the added
features of internal full-cycle soft start and internal
leading-edge blanking of the current-sense input.
The UCC3813-x device family offers a variety of
package options, temperature-range options, choice
of maximum duty cycle, and choice of critical voltage
levels. Devices with lower reference voltage such as
the UCC3813-3 and UCC3813-5 fit best into battery
operated systems, while the higher reference and the
higher UVLO hysteresis of the UCC3813-2 device
and UCC3813-4 device make these ideal choices for
use in off-line power supplies.