VSC7398XYU Integrated Circuits (ICs)

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VSC7398XYU is a special purpose analog switch in the field of interface. It is mainly used for switching power supply for mobile devices. It allows the computer to switch automatically between its internal power source, such as a battery, and an external power source, such as a wall plug or a car charger. This functionality requires the switch to have high accuracy, fast switching time, low voltage drop, and low power consumption.

The VSC7398XYU is made of semiconductor materials and consists of two N-channel MOSFET transistors for the switch elements and a voltage-controlled oscillator (VCO) for the control circuit.

The two MOSFETs are connected in parallel, with the drain of one being connected to the drain of the other and the source being connected to the source. The two transistors are each connected to the VCO. The VCO is also connected to two additional pins to switch the transistors on and off.

Each MOSFET has two properties: the gate-to-source resistance (Rg) and the drain-source resistance (Rds). The Rg determines how quickly the switch can be opened and closed, while the Rds determines how much power the switch will consume when switched on.

The VSC7398XYU is controlled by an external voltage signal. The voltage signal is applied to the VCO, which generates a square waveform with a duty cycle determined by the amplitude of the external signal. This square waveform is used to drive the two MOSFETs. When the voltage signal is low, the switch is open, and when the voltage signal is high, the switch is closed.

The advantage of this type of analog switch is that it can perform a logic operation without the need for a logic-level controller. This feature makes it ideal for use in mobile devices as it allows the device to switch between two power sources without any additional circuitry.

The switch is also designed to work in a limited current range and can handle up to 500mA of continuous current. This limit is sufficient for most mobile applications. In addition, the switch has a wide operating temperature range of -40°C to +85°C, making it suitable for use in extreme temperatures.

In summary, the VSC7398XYU is an analog switch designed for use in mobile devices. It is designed to switch power between an internal and external source and is capable of controlling up to 500mA of continuous current. It has a wide operating temperature range and can be used in extreme temperatures. The switch is easy to use and can be controlled by an external voltage signal.

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