UCC2804PWTR

The UCC2804PWTR is an integrated power switch developed by Texas Instruments Inc. It can be used in a variety of applications such as secondary side synchronous rectification, DC-to-DC 3-phase buck converters, single phase unipolar or bipolar switched mode power supplies, AC-to-DC front end converters, and active PFC circuits. UCC2804PWTR is suitable for working in a voltage range of 4.5V to 65V, and a control voltage of 0V to 5V. It is a high-side power switch that is optimized for low on-resistance (RDS(on)), providing up to 0.44Ω at the rated temperature.

UCC2804PWTR Application Field

The UCC2804PWTR is applicable in various application fields such as computer system, automotive, industrial and general power supply due to its powerful on-resistance and low EMI/EMC (Electromagnetic interference/Electromagnetic compatibility) feature.

• Computer system: UCC2804PWTR can be used as the main power switch in modern power supply unit (PSU) to improve the efficiency of the system and reduce the operating temperature.
• Automotive: UCC2804PWTR can be used as a secondary side synchronous rectifier in car charging systems, eliminating the need for diode in the circuit.
• Industrial: UCC2804PWTR can be used in many industrial applications such as motor drives and inverters to improve the power efficiency.
• General Power Supply: UCC2804PWTR can be used in AC-to-DC converters, DC-to-DC converters, active PFC circuits, and other general power supply applications.

UCC2804PWTR Working Principle

UCC2804PWTR has built-in features such as current limiting, output voltage regulation and thermal protection. The working principle of UCC2804PWTR is explained below:

UCC2804PWTR consists of four power-carrying pins (ACCP, ACCN, DCCP, and DCN) and two control pins (ACCP Control, and OVP Control). The voltage across the CONTROL pin, ( AC CONTROL pin) will determine the on-times of the switching regulator. DCCP, DCN and ACCP, ACCN pins are connected to the low and high side respectively, to provide current transfer from source to the load. As the voltage across the control pin falls, the MOSFET will turn on, allowing current to flow from source to the load. As the voltage at the control pin increases, the MOSFET will turn off, disabling the current to flow from source to the load. The output voltage is regulated by the OVP Control pin.

UCC2804PWTR also features built-in over-current protection. If the current passing through the switch exceeds the maximum limit, the switch will shut off automatically to protect the device. This feature helps to ensure the safety of the system and provides a reliable operation. It also features a thermal protection feature which will shut off the switch if the temperature exceeds the maximum rated temperature.

Conclusion

In conclusion, UCC2804PWTR is a powerful and reliable power switch suitable for various applications in the field of computer system, automotive, industrial, and general power supply. Its powerful on-resistance, low EMI/EMC feature, current limiting, output voltage regulation and thermal protection makes it an ideal choice for these applications.