TIDUET3 February 2021
The UCC28180 is a high-performance, continuous conduction mode (CCM), 8-pin programmable frequency power factor correction (PFC) controller. The wide and programmable operating frequency of the controller provides flexibility to design at a high frequency to optimize the components. The UCC28180 uses trimmed current loop circuits to achieve less than a 5% THD from a medium-to-full load (50% to 100%). A reduced current sense threshold enables the UCC28180 device to use a 50% smaller shunt resistor, resulting in lower power dissipation while maintaining low THD. The UCC28180 also consists of an integrated fast gate driver, with a drive of 2-A source current and –1.5-A sink current, which eliminates the need for an external gate driver. The UCC28180 device also has a complete set of system protection features that greatly improves reliability and further simplifies the design:
• Soft overcurrent
• Cycle-by-cycle peak current limit
• Output overvoltage
• VCC undervoltage lockout (UVLO) protection
• Open pin protections (ISENSE and VSENSE pins)