UCC28780RTER

UCC28780RTER Application Field and Working Principle

UCC28780RTER is a High and Low Voltage Pacer and Controller from Texas Instruments, which is specifically designed for AC and DC converters, as well as offline switchers, which can operate with a wide range of supply voltages. This device features a wide range of features and functions that provide excellent design flexibility and improved performance for today\'s systems.

Features and Benefits

The UCC28780RTER offers a range of features and benefits that can benefit system designers in a variety of ways. It offers a low-slope start-up mode, which minimizes the startup surge and enables a seamless transition from cold start to operating mode. This device also offers an adjustable direction control feature, which can be used to control the start up time and pulse duration of the input signal. Additionally, the UCC28780RTER provides a wide range of current and voltage sensing functions, enabling the system to be configured for a variety of monitoring and protection applications.

The device also features a wide range of integrated safety features, such as overvoltage, undervoltage, overcurrent, and short-circuit protection. It is also equipped with an advanced soft start capability, which helps to reduce the inrush current and provide steady-state performance.

Application

UCC28780RTER is mainly used for AC and DC converters, as well as offline switchers. It is especially suited for low-power systems, such as LED lighting, motor control, and power supplies. These systems require accurate current, voltage, and power regulation, which is enabled by the integrated current and voltage sensing capabilities of the UCC28780RTER.

The device is also suitable for high-power systems, such as motor drives and power converters. Its wide range of current and voltage sensing functions provides excellent protection against faults, and its soft start feature helps to reduce the system inrush current.

Working Principle

The UCC28780RTER utilizes pulse-width modulation (PWM) to regulate the output current and voltage. The device includes adjustable threshold levels, which define the peak and valley levels of the output waveform. When these levels are breached, the device sends out a signal back to the driver circuit that instructs it to adjust the output waveform. The device also features adjustable current and voltage sensing functions, which enable the system to monitor and protect the output from shorts and other faults.

The device can be configured to operate in either continuous or discontinuous mode, depending on the needs of the application. In continuous mode, the UCC28780RTER works to maintain a constant output signal. Conversely, in discontinuous mode, the device works to rapidly switch off the output when the desired threshold levels are not met.