UCC2960PG4

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The UCC2960PG4 is a fully-featured offline switching power supply controller from Texas Instruments. It is ideal for medium power, high efficiency, and cost-effective designs, providing an easily programmable way to boost circuit performance. The UCC2960PG4 offers an adjustable minimum on-time, dual slope operation, adjustable voltage soft-start, and a wide range of current-mode control options. These features make it a great solution for applications that require precise voltage regulation, low EMI and fast transient response.

UCC2960PG4 is suitable for a wide range of offline power supplies, including flyback, Forward, and quasi-resonant converters. Additionally, it is ideal for applications that require enhanced performance and flexibility, such as AC-DC power supplies, battery chargers, server power supplies, industrial and telecom power supplies, and applications with multiple outputs.

The UCC2960PG4 has a variety of features that make it ideally suited for a wide range of AC-DC offline switching applications. These features include an adjustable minimum on-time, dual-slope control, adjustable voltage soft-start, and a wide range of current-mode control options. With these features, the UCC2960PG4 provides high-efficiency, low EMI, and fast transient response for precise voltage regulation.

Additionally, the UCC2960PG4’s integrated termination-mode circuitry allows users to configure the controller to optimize the overall system performance and save PCB space. The dynamic slope adjust input (E2) provides dynamic loop response that satisfies all immunity requirements, which is critical for applications with low EMI requirements.

The working principle of the UCC2960PG4 is based on current-mode control, which is an important technique used in power conversion design. This technique provides good load regulation, fast transient response, and high efficiency for the converter system. The circuit relies on the current-sense amplifier and the current-sense comparator to control the converter output voltage.

The current-sense amplifier acts as a voltage-to-current converter and amplifies the voltage across the current-mode resistor. The current-sense comparator then compares the amplified signal to a reference voltage and produces a pulse-width-modulated (PWM) signal to control the main switch of the converter. In this way, the output voltage is accurately and quickly regulated.

The UCC2960PG4 also has adjustable minimum on-time and dual-slope operation. Adjustable minimum on-time is a feature that helps to reduce stress on the primary side components and reduce EMI emissions. The dual-slope operation allows the device to be programmed to provide an adjustable on-time to optimize the overall performance.

In addition, the UCC2960PG4 has adjustable voltage soft-start and a wide range of current-mode control options. With the adjustable voltage soft-start, the device can be programmed to provide a soft-start of the converter output voltage. This ensures that the output voltage rises gradually instead of abruptly when the converter is powered on. The wide range of current-mode control options allow the user to tailor the performance of the converter to suit the application.

The UCC2960PG4 is a highly flexible, reliable and efficient offline switching power supply controller. With its wide range of features and current-mode control, it is an ideal solution for medium power, high efficiency, and cost-effective designs. It provides programmable current-mode control options and adjustable minimum on-time, dual-slope operation, adjust voltage soft-start, and wide current-mode control options for precise control of the output voltage. Ultimately, the UCC2960PG4 is an excellent choice for offline switching applications, AC-DC power supplies, battery chargers, server power supplies, and industrial and telecom power supplies.

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