TIDUET3 February   2021

 

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2.3.1 UCC28180

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)