UCC2897PW

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This paper will discuss the application field and working principle of UCC2897PW, which is a DC-DC switching controller from Texas Instruments\'s integrated digital power portfolio. By looking into its features, we will also explain why it is classified as part of the PMIC (Power Management Integrated Circuit) Voltage Regulators.

The UCC2897PW is a high-voltage high-performance synchronous mode controller intended for offline pre-regulated output voltage applications up to 450V. It is ideal for buck converters where high current at low output voltage is needed. The device integrates both the pulse-width modulation (PWM) and driver control within a single chip. This shared architecture eliminates the need for multiple external components, while still providing both high out to the external MOSFETs and good soft-start performance.

Aside from its class leading performance, the UCC2897PW also offers low power consumption, adjustable deadtime and totem pole outputs. The chip can operate at switching frequencies up to 500 kHz, ensuring extremely fast control loop performance. These exceptional features make the UCC2897PW a highly reliable and efficient solution for voltage regulated power converters.

At the heart of the UCC2897PW is its unique technique for switching between Pulse Width Modulation (PWM) and Driver Mode. This intelligent technique ensures that no voltage or current spikes occur during the switching. Both modes of operation can be enabled or disabled depending on the application, allowing for maximum flexibility.

To provide best utilization power efficiency and reliability, UCC2897PW uses a closed-loop current-mode control technique that minimizes the ripple current through the inductor. This results in a vast improvement in power quality and reliability due to the improved capability of the system to reject disturbances.

In addition, the UCC2897PW offers an adjustable dead time which improves the efficiency and reduces the EMI levels. Furthermore, the device also provides protection features including under-voltage lockout (UVLO), overvoltage protection (OVP), and cycle-by-cycle current limiting (CCCL). These features make the UCC2897PW an ideal choice for high performance power converters and voltage regulators.

To summarize, the UCC2897PW is an advanced DC-DC switching controller designed for offline pre-regulated output voltage systems. Its unique combination of features, such as PWM and driver modes, closed-loop current-mode control and adjustable dead time, coupled with its high-voltage and fast switching performance, makes the UCC2897PW an ideal solution for voltage regulated power converters. Its superior features place it firmly in the PMIC (Power Management Integrated Circuit) Voltage Regulators category.

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