4818P-2-332LF

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Resistor Networks, Arrays, and the 4818P-2-332LF application field and working principle

Resistor networks, arrays, and other components of electronic systems play an integral role in many of today’s critical systems, such as medical, aerospace, military, and automotive applications. Resistor networks are used to regulate current, limit voltage, and provide impedance matching for electronic components. An example is the 4818P-2-332LF resistive network designed and manufactured by Vishay Intertechnology. This resistor network in in 8-pin surface mount form-factor and features three identical resistor elements in an array, each having a different resistance value.

The Vishay 4818P-2-332LF resistor network is a three-terminal low-cost component designed for use in a variety of applications, including DC-DC converters for powering notebook computers and other mobile computing devices. Its low profile and high density design makes it ideal for applications requiring high-density mounting. The outer two terminals (pins 1 and 8) are each connected to one resistor in the network, while the middle terminal connects the two resistors in parallel. The Vishay 4818P-2-332LF resistor network has a resistance rating of 332Ω, and a tolerance of ±10%. The power rating is 0.05 watts and the chip size is 1206 (0.125”x0.062”).

The Vishay 4818P-2-332LF resistor network works on the resistor divider principle. When a voltage is applied across pins 1 and 8, the total resistance from pin 1 to pin 8 is split equally between the two resistors in the network. Since the resistance of each resistor is different, the voltage between the outer pins will be split between the two resistors, and the voltage between the middle pin and each of the outer pins will be the same. This is known as a “resistor dividing” action and is often used in applications requiring precise voltage regulation.

The Vishay 4818P-2-332LF resistor network also can be used for “charge pumping”, a technique used to transfer energy between two circuits. This technique can be used to increase the voltage of a supply or to provide lower-than input voltage level shifting. In a basic charge pumping circuit, the 4818P-2-332LF resistor is connected between two power sources and is alternately charged and discharged. This creates an alternating current which can be used to transfer energy from one circuit to another.

The Vishay 4818P-2-332LF resistor network is also useful in compensated power designs. It provides a low-cost solution when used for compensation on the load side of the power supply and in filtering the output of rectified signals (e.g. from a DC-DC converter). In addition, the Vishay 4818P-2-332LF resistor network can be used for noise reduction, and as a current sensing element.

The Vishay 4818P-2-332LF resistor network is a versatile and cost-effective component for a wide variety of applications. Its low profile and high density design make it ideal for high-density mounting, and its small size and low cost make it perfect for applications requiring precision voltage regulation and charge pumping. Its compensated power design abilities make it suitable for filtering the output of rectified signals from DC-DC converters and providing low-cost load-side compensation. In addition, it can be used for noise reduction, current sensing, and other applications.

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