UCC38C43DGKG4

The UCC38C43DGKG4 is a DC-to-DC switching controller from Texas Instruments precision power module series. It offers active current limitation, short-circuit protection, and on-chip sglation to help customers reduce power losses, costs and design time.

The UCC38C43DGKG4 is a highly integrated, DC-to-DC synchronous step-down switching regulator controller with two outputs. The device operates by controlling the current it drives through the low-side MOSFET to deliver a regulated output voltage. An internal current sense amplifier measures the current through the low-side MOSFET and compares it to the reference voltage set by the CTRL voltage. The internal PWM control loop uses this information to adjust the MOSFET current, allowing the device to provide an excellent load and line regulation on the output voltage. The device also features programmable frequency and soft-start for even greater flexibility.

Application Fields of UCC38C43DGKG4

The UCC38C43DGKG4 DC-to-DC switching controller is well-suited for conversion applications, serving a variety of demands as a power supply delivered at multiple voltage points. It is particularly useful for computing and networking applications, as well as distributed AC and DC power supply systems. Its programmable frequency and soft-start makes it suitable for low leakage applications such as low power standby supplies.

The UCC38C43DGKG4 is also well-suited for use in mobile computers, motor drive applications, point-of-sale terminals, automated teller machines, and other industrial applications where efficient design is essential.

Working Principle of UCC38C43DGKG4

The basic operating principle of the UCC38C43DGKG4 is to control the amount of current that flows through the low-side power MOSFET by sensing its voltage. A voltage reference is set with the CTRL voltage and the PWM control loop uses it to determine the proper amount of current to be delivered to the load. As the load changes, the device adjusts the current it drives through the MOSFET, allowing the voltage output to remain constant. The device also adjusts the current to compensate for input line variations, allowing for improved regulation on the output.

The UCC38C43DGKG4 also features a voltage look-up table that allows the user to program the output voltage. This feature is especially useful when trying to optimize efficiency or reduce noise in the system, as the voltage can be increased or decreased depending on the load conditions. This feature can also be used to set the output voltage within a given range, which can help reduce system costs by eliminating the need for external components.

The device also utilizes a proprietary current mode control that allows it to adjust its operating frequency in order to maintain stable output voltage. This can help ensure reliable, robust operation and improved efficiency by adjusting the frequency as load conditions change.

In addition to its voltage regulation capabilities, the UCC38C43DGKG4 features on-chip isolation for the controller and output. This allows the device to be used in a variety of configurations and helps to reduce power losses and costs.

Conclusion

Overall, the UCC38C43DGKG4 DC-to-DC switching controller is a highly integrated and versatile device that is well-suited for a variety of conversion applications. Its active current limitation and on-chip isolation make it ideal for distributed AC/DC power supply systems and computing/networking applications. Its programmable frequency and voltage look-up table features make it suitable for low leakage applications and for optimizing efficiency. All of these features come together to make the UCC38C43DGKG4 a great choice for engineers looking to reduce power losses, costs and design time.