UCC28528DWR

Power Factor Correction (PFC)

Power Factor Correction (PFC) is the practice of improving the power factor of an electrical system to ensure that both active and reactive power components are even within the system, resulting in better efficiency and fewer losses. Power Factor Correction (PFC) is an essential technology for energy efficiency and power quality in modern power electronics. The UCC28528DWR is a high-efficiency, high-performance PFC power factor correction controller ideal for LED drivers, SMPS, and other applications that require high efficiency and long system lifetime.

UCC28528DWR Application Field

The UCC28528DWR is built on TI’s high efficiency, current mode control IC platform. It is configurable for universal input (85-265VAC) or single high input (265-420VAC). With an integrated power switch and half-bridge and full-bridge topology configurable for three-, two-, and single-stage applications, the UCC28528DWR is highly applicable for LED lighting applications.

The UCC28528DWR provides pin selectable peak current mode or continuous conduction mode operation, and provides low component count via a single-stage boost PFC operation. It is also ideal for both constant on-time and fixed off-time control designs. Overall, the UCC28528DWR is an excellent choice for PFC design with guaranteed 80+ efficiency ratings.

UCC28528DWR Working Principle

The UCC28528DWR follows a peak current mode control and works with half-bridge and full-bridge topologies. It controls and maintains the peak power factor while keeping both current and voltage in phase. The integrated driver circuit allows it to switch N-channel MOSFETs or IGBTs with a frequency up to 350kHz.

The UCC28528DWR measures the line input voltage and proposes a duty cycle for the switching power devices in order to maintain constant power. It features two dedicated external compensation pins for the control loop and for the voltage loop, as well as making the design faster and simpler. Moreover, the cycle-by-cycle current limit threshold is independently adjustable from 10mA to 250mA.

The UCC28528DWR features an innovative adaptive-on-time Constant On Time (COT) control for achieving fast transient response and low THD. It also offers a double-SAMPLE and HOLD circuit for feedback voltage, current, and maximum fast loop response.

Conclusion

The UCC28528DWR is a versatile and highly efficient PFC controller that is ideal for LED driver applications and SMPS, ensuring high efficiency and long system lifetime. It is built on a peak current mode control to ensure great power factor rating and easy tuning of current and voltage. The UCC28528DWR also has advanced features such as the double-SAMPLE and HOLD circuit, and adaptive-on-time COT control for fast transient response, making it a great choice for PFC design.