UCC28513DWG4

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Power Factor Correction (PFC) is a major component of the power management integrated circuit (PMIC) family. A PFC is a type of electronic circuit that is used to increase the power factor and efficiency of power sources. UCC28513DWG4 is one such PFC developed and manufactured by Texas Instruments, designed specifically to be used in automotive applications. This article provides an overview of the UCC28513DWG4 application field and its working principle.

UCC28513DWG4 is a dual-channel PFC controller with integrated gate drivers. It operates with a wide input voltage window of 9.5V-50V, making it a suitable choice for automotive applications like DC/DC converters, LED Headlight systems, Battery management systems and Ignition coil drivers. The UCC28513DWG4 features an integrated eight-LED driver, gate driver with low startup current, and two 2A/41V MOSFET outputs. It also has an internal, temperature-compensated voltage reference and an accurate, 0.5% regulation controller.

When it comes to the working principle of the UCC28513DWG4, it follows the typical common-source, continuous-conduction mode (CCM) topology. As the supply voltage rises, the controller will shut off the gate driver and draw current from the input. This reduces the voltage across the inductor, essentially increasing the peak inductor current. As current continues to decrease, the controller will cut off the MOSFET until the threshold (typically around 66% duty factor) is reached. At this point, the controller resumes the gate driver prior to excelerating the process and returning to the start. This action continues as long as current is drawn from the supply, thus creating a DC voltage.

The main feature of the UCC28513DWG4 is its accurate and stable output voltage. This is made possible by the controller’s high accuracy internal voltage reference and precise regulation. The voltage reference has excellent temperature coefficient, typically within ±1mV/°C and 0.5% output accuracy. Also, the controller features an output-voltage tracking accuracy of ±1%. The UCC28513DWG4 can also achieve excellent transient performance with its LinRamp start-up that reduces the voltage output overshoot to less than 1%.

For circuit protection, the UCC28513DWG4 has a number of features. It has a thermal protection system which stops the PFC controller at junction temperatures greater than 140°C. The controller also has built-in under-voltage lockout and an integrated slew rate control for the MOSFET gate driver. Additionally, the controller uses an input-voltage sense track ratio of approximately 3.2V/V + 5% for over-voltage protection.

Overall, the UCC28513DWG4 has been designed to best meet the performance and reliability needs of automotive applications. It is the ideal choice for DC/DC Converters, LED Headlight Systems, Battery Management Systems and Ignition Coil Drives, due to its wide input voltage window, high accuracy output voltage, superior transient performance, circuit protection features and its ease of use. As such, it can be seen that the UCC28513DWG4 is a powerful and reliable PFC controller for a wide range of automotive applications.

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