S-817B43AY-B2-U

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S-817B43AY-B2-U is a linear voltage regulator manufactured by Silverstone. This device is designed to withstand a wide range of input and output voltages and offers low dropout, low noise, and high accuracy. This makes it ideal for applications such as backup systems, portable devices, and medical electronics, where power and voltage regulation is critical. It is also a good choice for applications requiring a combination of low voltage and current regulating solutions, such as for automotive electronics.

The S-817B43AY-B2-U is a monolithic linear voltage regulator that uses a standard three-terminal configuration, with two control pins and a ground pin. It is available in an 8-pin PLCC or 8-pin PDIP package, and can provide output voltages ranging from 1.5 V to 43.2 V. It has a maximum output current of 2 A and can withstand input voltages up to 40 V. Furthermore, it offers excellent accuracy, with a line regulation of 0.2%, an output current capability of 0.2%, and an output voltage accuracy of 0.5%. The device also features an adjustable low power current limit and a thermal overload protection mechanism.

The working principle of the S-817B43AY-B2-U linear voltage regulator is based on a voltage divider circuit. In this circuit, two resistors form a voltage divider that has a fixed upper end, and the rest of the circuit is adjustable depending on the supply voltage and the output voltage required. This configuration enables the voltage regulator to maintain a constant output voltage, regardless of the supply voltage.

To control the output voltage, the S-817B43AY-B2-U uses a feedback loop. This loop consists of a fixed voltage reference, a voltage comparator, an error amplifier, and a feedback resistor. When the output voltage deviates from the set voltage, the voltage reference sends a signal to the voltage comparator, which triggers the error amplifier to adjust the output current. The output of the error amplifier is then fed back to the voltage divider and adjusts the reference voltage, thereby enabling the voltage regulator to maintain the set voltage.

Additionally, the S-817B43AY-B2-U also features a current limit protection circuit. This circuit contains a current sensing resistor and a comparator. When the output current exceeds the set current limit, the comparator detects this and activates the protection circuit. The protection circuit then limits the output current to prevent the device from being damaged.

The S-817B43AY-B2-U is a versatile linear voltage regulator that is suitable for a variety of applications. It is an ideal choice for automotive electronics and portable devices that require high precision, low noise, and low dropout. Additionally, it can be used in applications requiring a combination of low voltage and current regulating solutions.

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