UCC2817DTRG4

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The UCC2817DTRG4 is an application specific integrated circuit (ASIC) used within an active power factor correction (PFC) module. The device is an intra-stage regulator used in active PFC circuits to regulate the voltage of the input powerline with a constant current source control loop.

The UCC2817DTRG4 is designed for both single-ended and double-ended topologies. The ASIC incorporates proprietary high-voltage capability logic which ensures high efficiency and improved current regulation. The ASIC provides an additional voltage feedback path for the output of the active PFC circuit, eliminating the need for an optocoupler or additional circuitry in the system.

The UCC2817DTRG4 application field aims to convert AC input power into DC while maintaining high efficiency and dynamic performance. In order to achieve this, the ASIC features an on-chip power MOSFET driver and an ultra-fast current regulator. In addition, the device offers a wide range of control and protection features to optimize dynamic performance and efficiency without compromising system safety. Further, the UCC2817DTRG4 includes EMI filter and line disconnect features, allowing the module to meet different national requirements.

The UCC2817DTRG4 working principle is based on the traditional peak-current-mode PFC controller, which is implemented in a singlechip integrated circuit. By combining the high-controllability of the traditional peak-current-mode system with the precision and reliability of the ASIC, the device offers high-performance and low-noise current regulation with minimal internal components. The ASIC incorporates a wide range of power line and capacitor sensing components as well as auxiliary circuits such as EMI filter, output disconnect, and under-voltage lockout. The device also provides an adjustable constant-current source output for the last stage of the PFC system.

The UCC2817DTRG4 is designed for applications such as off-line and DC/DC converters, computer power supplies, remote terminal devices, lamps, appliances, and high-end gaming systems. The ASIC provides optimized and automated regulator and control features to facilitate the fast and accurate PFC solution and reduces total system cost and complexity when compared to other solutions.

In conclusion, the UCC2817DTRG4 is a high-efficiency and high-performance ASIC used in active PFC modules. The device is designed to provide optimized and automated regulator and control features, and it also offers a wide range of protection and diagnostic features to ensure safe and reliable operation. The UCC2817DTRG4 is ideal for applications such as off-line and DC/DC converters, computer power supplies, remote terminal devices, lamps, appliances, and high-end gaming systems.

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