SF05S4803A

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The SF05S4803A converter is a DC DC converter that can be used to switch DC input power into an adjustable output voltage. It is a high performance device with wide input voltage range and advanced features such as short circuit protection, over-voltage protection, and thermal shutdown.

The SF05S4803A can be applied in various power supply requirements. It allows for typical standby currents from 0.2 mA to 3.2 mA, and allows for peak currents of up to 15A. It offers a wide input voltage range from 3.3V to 48V and can support 50V surge input. It is also suitable for lower voltage applications, such as 3.3V and 5V, while offering the capability to support higher input voltage as well. It also has low on-state resistance, allowing for higher efficiency.

The SF05S4803A provides adjustable output voltage in the range of 1.2V to 30V with a 0.8 - 45V default adjust range. It has a wide frequency range for operation from 6 kHz to 400 kHz, providing flexibility depending on the application\'s requirements. It also has an adjustable switching frequency selection of 6 kHz, 10 kHz, 150 kHz, and 250 kHz, with a 30 kHz default setting.

The SF05S4803A also offers several features that enhance its suitability for different applications. These features include over-temperature protection, allowing for a maximum temperature control of 150°C. It also includes a soft-start feature, allowing the device to gradually increase the output voltage from zero to the desired voltage, ensuring no overload or power stitching when powered on. Furthermore, its low input reverse current and high common-mode transient immunity, provide better protection against voltage fluctuations.

The working principle of the SF05S4803A is based on the buck-boost converter topology. A buck-boost converter is a type of DC-DC converter that can be used to change either the voltage or the input current, depending on what the user needs. In the SF05S4803A, the buck-boost converter is used to convert an incoming DC voltage into an adjustable output voltage.

When the SF05S4803A is powered on, the power-on reset provides a maintained reset to the DC/DC converter. The input voltage is monitored by the chip and the voltage range is programmed with the adjust circuitry. This adjust circuitry is configured to provide the desired output voltage from the DC/DC converter. The adjustable output voltage is then filtered by the output stage of the chip.

Once the output voltage is set, the SF05S4803A will regulate it through a switching control circuitry. The control circuit provides the means to switch on and off the DC/DC converter\'s output switch. The maximum frequency for operation is 400 kHz, thus, the switching control circuitry keeps the switching frequency at 10 MHz for high speed switching.

To ensure the safety of the device, the SF05S4803A includes protection features. The over voltage protection feature is used to monitor the output voltage during the operation and protect the device when the output voltage exceeds the desired level. Additionally, it also incorporates an over-temperature protection feature that shuts down the device when the internal temperature exceeds a safe level.

The SF05S4803A DC DC converter is a versatile device with many features and benefits that make it suitable for a wide range of applications. Its wide input voltage range, adjustable output voltage range, and low on-state resistance, ensures the device is suitable for all kinds of power supply requirement. Moreover, its protection features like over-voltage and over-temperature protection safeguard the device against any damages, thereby providing the user with greater safety and reliability.

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