SPPC12251

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AC/DC converters are used to convert an alternating current (AC) input into a direct current (DC) output. The SPPC12251 is one such converter that offers power conversion efficiency of up to 95%. It is a synchronous rectified step-down DC/DC converter with an adjustable output voltage that has a range of 0.8V to 2.5V. The device features a wide input voltage range of 4.75V to 16.5V and can provide up to 1.25A output current. The SPPC12251 also has many other features and benefits, such as a high switching frequency, low quiescent current, and a current limit that can be adjusted with an external resistor.

The SPPC12251 is designed to be used in a variety of applications, including cellular base stations, vehicle electrics, and general purpose power supplies. It can be used in systems where low noise, small size, and high efficiency are important, such as battery-powered devices, solar power systems, and renewable energy systems. The SPPC12251 uses synchronous rectification with the use of two MOSFETs to convert the alternating current input into a direct current output. This method of rectification is significantly more efficient than traditional forward or hard-switched rectification, resulting in higher efficiency and less energy loss.

The SPPC12251 has a fixed frequency of 500kHz, and the output voltage can be adjusted by setting the value of an external resistor. The output voltage is regulated by an internal error amplifier that compares the output voltage to the voltage on a reference pin. The error amplifier signals the switching MOSFETs to turn on and off, adjusting the output voltage as needed. The device also features a low-quiescent current design, which helps to reduce power-supply losses and improve efficiency. In addition, the device can be enabled and disabled using an external signal, allowing the system to be turned off when not in use.

The SPPC12251 also has over-current protection that can be configured by setting an external resistor. The device senses the current at the output of an external sense resistor, and if the current exceeds the threshold set by the user, the device will disable itself to prevent damage to the system. The device also has thermal protection to prevent it from getting too hot, and can also be enabled and disabled using an external control pin. This allows the user to customize the behavior of the device depending on the requirements of their application.

Overall, the SPPC12251 is a highly efficient, low noise and small size AC/DC converter that is well suited for use in a variety of applications. It has a wide input voltage range, adjustable output voltage, and supports a wide range of output currents. The device also has many protection and control features, such as over-current protection, thermal protection, and enable and disable pins. These features make the SPPC12251 a great choice for power conversion applications.

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