UCC28C45MDREP Integrated Circuits (ICs)

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UCC28C45MDREP Application Field and Working Principle

The UCC28C45MDREP is a DC-DC Switching Controller from Texas Instruments, which offers multiple features to improve the operating efficiency of low to medium power applications from 12V to 24V. This device allows for optimal switching in boost, buck and dual-inductor configurations for DC-DC converters. It is part of TI’s Power Management IC (PMIC) family, specifically within their Voltage Regulators – DC DC Switching Controller product line.

The UCC28C45MDREP is an 8-pin device, with results delivered at an operating temperature ranging between -40°C and 85°C. This device uses a single-ended current sense topology, with either primary side control mode or secondary side control mode available. It includes a number of features aimed at improving system performance, including a unique soft start feature, a frequency dithering mode, a low startup current and improved shutdown current, and a wide range of adjustable frequency and current slope compensation.

The UCC28C45MDREP is particularly suited for applications requiring an adjustable switching frequency and/or variable / adjustable output voltage. Its current slope compensation feature makes it an ideal choice for high-power applications such as AC-DC adapters, DC-DC Converters and LED Drivers, where improved power conversion efficiency is desired. This device also offers a wide range of operating voltage ranges, from 12V to 24V, and can provide a maximum output current of up to 6A.

This DC-DC Switching Controller utilizes a power-efficient pulse width modulation (PWM) control scheme to regulate and control the output voltage. Through controlling the on-time and off-time of the controller’s MOSFET switch, a regulated voltage is delivered to the output. The controller also offers a soft start feature which enables a gradual ramp-up of the output voltage when the system is powered on, avoiding large inrush current and generating a smooth transition to the desired output voltage level.

This device also includes programming options that can be used to adjust the operating frequency, switching profile, and current protection point. Additionally, the device features internal protection and diagnostic features, including over-voltage protection, under-voltage protection, and over-temperature protection. All of these features combine to make the UCC28C45MDREP an ideal choice for applications requiring efficient power conversion and adjustable output voltage.

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