UCC2806DWTRG4

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UCC2806DWTRG4 Application Field and Working Principle

UCC2806DWTRG4 is an advanced integrated DC-DC switching controller that is used for multiple industrial and consumer applications.

It is an integrated device that includes a DC-DC switching controller and an internal high-side and low-side switch, enabling it to provide a wide voltage regulation range, low power dissipation, and fast transient response. In addition, the chip also provides protection against undervoltage lockout and overvoltage protection, as well as overload protection and thermal overload protection.

UCC2806DWTRG4 is designed to reduce overall system cost by eliminating the need for external components such as opto-isolators, PWM controllers, and gate drivers. It is suitable for secondary-side synchronous rectification in flyback topology, positive or negative buck topology, and positive or negative boost topology, as well as quasi-resonant and self-oscillating mode for both active and passive Snubber circuits. Additionally, the chip includes a programmable oscillator, allowing for flexibility in selecting the desired switching frequency.

Application Field

The application field of UCC2806DWTRG4 is varied and covers many industrial and consumer applications. It provides good performance in applications such as power supplies, motor controllers, server power supplies, notebook adapters and chargers, LED lighting, and portable products.

Working Principle

The UCC2806DWTRG4 DC-DC switching controller includes an internal high-side switch, an integrated driver and a low-side switch, along with a number of features and protection functions. The high-side switch is a metal-oxide semiconductor field-effect transistor (MOSFET) used to control the flow of power from the input voltage to the output voltage. The integrated driver is responsible for driving the high-side switch, and the low-side switch is a MOSFET that is responsible for controlling the flow of power from the output voltage back to the input voltage.

The UCC2806DWTRG4 is able to adjust the operating frequency of the high and low side switches to optimize performance according to the load. The chip also includes a slew rate control function, which enables the user to control the rate of change of the duty cycle, and thus optimizes the utilization of the inductor and associated components.

Furthermore, the chip is also equipped with a built-in undervoltage lockout (UVLO) and overvoltage protection (OVP) circuit, which protects against the loss of power due to an overvoltage or undervoltage condition. Additionally, the chip includes an overcurrent protection (OCP) circuit, which prevents excessive current from entering the system, thus protecting against overloads.

Finally, the UCC2806DWTRG4 includes a thermal overload protection (TOP) circuit, which activates when the junction temperature of the chip exceeds a safe level, and shuts down the power supply if it does. This helps to avoid any possible damage to the system caused by high temperatures.

Conclusion

The UCC2806DWTRG4 is an integrated device designed to reduce the overall system cost by removing the need for multiple external components. It is suitable for a wide range of industrial and consumer applications, allowing it to provide high performance and reliability in regulated power supplies. Additionally, the chip offers protection against undervoltage lockout and overvoltage protection, as well as overload protection and thermal overload protection, making it a safe and reliable solution.

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