UCC2813D-4

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The Texas Instruments UCC2813D-4 is a high voltage, current limited, external loop compensated off-line current mode switching regulator. This device is designed to provide an inexpensive power supply design solution with full circuit protection. In addition, the UCC2813D-4 features programmable under voltage and over voltage detection, current limit protection, programmable soft start, and thermal protection. These features make the UCC2813D-4 an ideal choice for offline power supplies and AC-DC converters.

The UCC2813D-4 operates in the current mode, meaning that the current is controlled through an external sense resistor. It uses a high current, low side MOSFET switch to provide fast transient response, low noise operation, and low distortion. The internal oscillator frequency can be programmed from 25kHz to 500kHz. The internal loop compensation allows for small external components, resulting in easier and faster design of a regulator power supply.

The UCC2813D-4 features an Under Voltage Lock Out (UVLO) which senses the input voltage and will turn off the device if the voltage falls below the specified level. This prevents the power supply from operating in a regulation range and prevents the power supply from outputing excessive current. Additionally, the UCC2813D-4 features an Over Voltage Protection (OVP) which senses the input voltage and will turn off the device if the voltage exceeds the specified level. Internal current limit protects the power supply against overload.

The UCC2813D-4 also features an internal current limit with programmable soft start. The current limit is set to the maximum value with an internal resistor, which sets the minimum on time for the internal switch. Soft start prevents the inrush current from being excessive during startup. Furthermore, the UCC2813D-4 includes an internal temperature sensing circuit which will limit the temperature inside the power supply.

The UCC2813D-4 is a cost effective solution for low power applications requiring an accurate, reliable, and isolated power supply. It is an ideal choice for applications in consumer electronics, industrial controls, medical devices, telecommunication systems, as well as medical diagnostic, automotive, and avionic systems. With its comprehensive feature set, the UCC2813D-4 serves as an excellent solution for a wide range of applications.

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