S-812C30BPI-C4KTFU Integrated Circuits (ICs)

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Linear voltage regulation is a key element of power supply management in applications such as charging, communications, and power supply design. The S-812C30BPI-C4KTFU is a model of a linear voltage regulator integrated circuit (IC) created by Semtech. With the addition of external components, this IC can provide the single input, adjustable output and enable functionalities that are essential for power management design. In this article, we will look at the application fields, internal working, and circuitry of the S-812C30BPI-C4KTFU.

Applications

The S-812C30BPI-C4KTFU is a high-efficiency, robust, and flexible device with low power consumption designed for various applications, such as:

• Automotive camera modules
• Data converters
• RF isolation products
• Electric vehicle charging
• Flexible analog interfaces
• Power over Ethernet for IPv6 networks
• System-level monitoring and control

The device is well-suited for harsh environment applications including solar power, automotive, or industrial environments. It integrates key protection features, including over-temperature protection and short circuit protection, to ensure system reliability and reduce design effort.

Working Principle

The S-812C30BPI-C4KTFU is a linear voltage regulator integrated circuit (IC) used to regulate incoming voltage at it\'s desired operating voltage. The device allows for adjustable output voltages of up to 28V, and supports input voltages up to 40V. The device features Low Dropout (LDO) in the output which allows it to regulate an output voltage even when the input voltage is close to the output voltage. The LDO regulator allows the device to stay in regulation even when load conditions vary, thus allowing for more efficient operation than a switch mode regulator.

The device is implemented with a series of transistors and resistors that switch and control the voltage of the output relative to the voltage of the input. The output voltage is controlled by the external resistors, R1 and R2. R1 is a resistor connected to the input voltage, while R2 is a variable resistor connected to the output voltage. By connecting a variable resistor to the output, the output voltage can be adjusted. This control can be used to precisely set the reference voltage at the output node.

Circuitry

The S-812C30BPI-C4KTFU is constructed with an efficient, single-stage power regulation design that can support output voltages up to 28V. The output voltage is determined by the combination of an error amplifier, voltage reference, and feedback resistor. This design allows for high precision output voltage control over a wide range of input voltages, while making the board design easier and reducing the number of components used.

The regulator includes two low-loss N-type switches that support short-circuit protection and over-temperature protection by reducing power dissipation. The switches are also inherently incapable of conducting peak inductor current resulting in improved output voltage accuracy and better transient response. The device also includes an internal soft start function to reduce the inrush current when the device is powered on.

The device also includes protection features such as output overvoltage protection and input undervoltage protection. Output overvoltage protection (OVP) prevents the output voltage from exceeding the desired voltage, and input undervoltage protection (UVP) prevents the device from consuming too much power when the input voltage falls below the minimum specified voltage.

In addition, the device features ripple rejection for noise filtering and thermal protection for device reliability. The device also offers frequency tracking, allowing for low-noise operation with optimal efficiency over the entire load range.

Conclusion

The S-812C30BPI-C4KTFU is a high-efficiency, robust, and flexible device with low power consumption. It is designed for a wide range of applications, including automotive camera modules, data converters, RF isolation products, electric vehicle charging, flexible analog interfaces, and Power over Ethernet for IPv6 networks. The device utilizes a series of transistors, resistors, and switches to regulate the output voltage from a single input and support OVP, UVP, and other protections and features. The device also features frequency tracking and thermal protection, allowing for low-noise operation with optimal efficiency over the entire load range.

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