UCC2809P-2

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Power management ICs (PMICs) are increasingly becoming an important component of today\'s complex electronics systems. They provide designers with a range of products that offer high levels of efficiency and reliability, while also helping reduce costs. UCC2809P-2 is a low cost AC/DC step-down converter with a peak efficiency of 98%. It is part of the Universal-la-Cell PMIC family and offers excellent performance for a wide range of applications, from lighting and power supplies to personal electronics and IT peripherals.

UCC2809P-2 is a Pulse Width Modulation (PWM) offline switcher with on-chip features like soft-start, enabling, current limit protection, short circuit protection and thermal shutdown. It can be operated in either continuous conduction mode (CCM) or discontinuous conduction mode (DCM). The device has an operating temperature range of -40 to +85 °C and is also compliant with industry standard application safety regulations, such as UL 60950 and EN 60950.

The device can be used in a variety of applications, such as Adapter, Adapter/Charger, Constant Voltage Source, Desktop PC, LCD and PDP HDTV. It can also be used in applications such as SMPS (Switch Mode Power Supplies) converters, AC/DC wraparound converters, and offline switched mode power supplies. Additionally, the device can also be used in automotive systems and uninterruptible power supplies (UPS) converters.

The main working principle behind UCC2809P-2 is current mode control. This method provides high performance, low component count and low cost applications. The core of the device consists of an active regulator circuit that controls the output voltage with the feedback provided by a voltage divider. The device operates in CCM mode at light to medium load, and in DCM mode at heavier loads. The built-in enable input can be used to enable or disable the device.

The UCC2809P-2 is controlled by a variable frequency voltage mode control loop, allowing the peak current to be controlled accurately, while also delivering fast transient response. An external resistor connected to the VCC pin controls the amount of peak current. The device can produce output voltages as low as 0.85V with a maximum of 36W power output.

UCC2809P-2 also features a built-in Synchronous Rectification Control (SRC) circuit that allows the device to automatically switch between synchronous rectification and linear mode, while ensuring high efficiency over a wide range of load conditions. It has a wide range of protection features, including under-voltage lockout (UVLO), over-current protection (OCP), and thermal shut down (TSD), allowing the device to safely and reliably operate under fault conditions.

Overall, the UCC2809P-2 is a high efficiency AC/DC step-down converter for a wide range of applications. Its high efficiency and wide variety of safety features make it an excellent choice for applications requiring power management solutions. It is an ideal solution for applications that require low cost, high efficiency, and reliable performance with minimal external components.

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