Texas Instruments High-Performance Analog PMIC - PMIC - PFC (Power Factor Correction) - UCC28517DWR UCC28517DWR

The UCC28517DWR is a Power Factor Correction (PFC) integrated circuit designed for off-line power systems that require compliance with IEC1000-3-2 harmonic reduction standards. It combines PFC and PWM control in a single device, offering significant performance and cost advantages. The device features leading-edge modulation for the PFC stage and trailing-edge modulation for the PWM stage, which helps minimize ripple current in the boost capacitor. This IC operates with average-current-mode control for continuous conduction mode, providing a highly linear multiplier for near-unity power factor and improved load transient response. It includes built-in sequencing for PFC and PWM turn-on, a 2-A source and 3-A sink gate drive capability, and programmable maximum duty cycle and soft-start features. The UCC28517DWR supports a PFC to PWM frequency ratio of 1:2, allowing for flexible design options. The device is available in a 20-pin SOIC package and operates over a temperature range of -40°C to +105°C. It also includes various protection features such as under-voltage lockout, peak current limiting, and zero power detect, making it suitable for a wide range of applications in power management.