UCC28502DWG4

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Power Factor Correction (PFC) is an important technique used in modern power delivery systems in order to maintain the electrical power quality of the power source. The main purpose of Power Factor Correction is to reduce power supply losses and to improve system efficiency. UCC28502DWG4 is a single-chip PFC controller designed to provide high-performance current, voltage and power-factor control to boost rectifiers in switched-mode power supplies, allowing a wide range of input voltages.

This chip is designed to maximize the efficiency of the power supply depending on the environmental conditions and operating temperature. It offers innovative features such as active input current clamping (AIC) and flexible dynamic current sharing. UCC28502DWG4 can be used with a wide range of switching devices, such as low-voltage FETs and Schottky diodes. It is also compatible with power transistors such as IGBTs, MOSFETs and bipolar transistors.

The UCC28502DWG4 is well-suited for different application fields like single and multiple DC output power supplies, white goods, home appliances and industrial equipment. For example, it is the perfect choice for automotive supplies like infotainment systems, power seats, and air-conditioners. It provides excellent power factor performance, making it suitable for both grid-tied and distributed applications.

The working principle of the UCC28502DWG4 is based on the control loop used in a boost rectifier. The control loop senses the current waveforms in the rectifier circuit and uses a high-side sensing network to read the input current. The controller uses the sensed current waveforms to dynamically adjust the operation of the power supply. The controller takes the desired boost voltage and continuously adjusts the pulse width of the drive signals to the switching device in order to regulate the input current in order to achieve the desired boost voltage.

UCC28502DWG4 also offers a powerful protection system that includes adjustable DC-over-voltage (DC-OV) and DC-under-voltage (DC-UV) protection, adjustable over-current and short-circuit protection, as well as Over Temperature Protection (OTP). This controller also supports various voltage and current-mode operation and various dynamic current sharing configurations. It also offers flexible input and output power for different load conditions.

In conclusion, the UCC28502DWG4 is a powerful, single-chip power factor correction controller that is suitable for a wide range of applications. It offers exceptional power factor performance and reliable protection features, making it the perfect choice for automotive, home and industrial applications.

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