PT79SR108S

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DC-DC converters are electronic circuits which convert variable DC power from one voltage level to another. A common application of DC-DC converters is to generate power supply systems for electronic equipment such as radios, computers, and medical devices. One such DC-DC converter is the PT79SR108S. This article will discuss the application fields and working principles of the PT79SR108S.

Application of PT79SR108S

The PT79SR108S is an adjustable power supply solution designed for applications such as cellular phones, digital cameras, and portable electronic devices. It features wide input voltage range, high full-load efficiency, protection against over-voltage, output short-circuiting, noise and surge immunity, and low power consumption. It has a wide range of adjustable output current and voltage, from 0.5 A to 15 A and from 1.6 V to 20 V respectively.

The PT79SR108S is also ideal for medical equipment such as portable medical imaging systems and patient monitors that require a reliable and adjustable power supply. Its low internal power consumption reduces the amount of energy used to run the device, while its wide range of adjustable outputs makes it suitable for medical equipment which need to be tailored to different patients’ needs.

Working Principle

The PT79SR108S is a step-down or buck converter, which is used to convert a higher input voltage to a lower output voltage. It consists of a switching converter, a rectifier filter, and a control loop with an internal error amplifier.

The switching converter works by rapidly turning on and off a power transistor, which switches the input voltage to the output. This creates an alternating current (AC) output, which is then rectified by a rectifier filter that consists of multiple capacitors and diodes which transform the AC into a filtered DC output with fewer ripples. The control loop then uses the error amplifier to compare the output voltage to the reference voltage, and adjusts the switch control signal to achieve the target voltage.

This feedback control also ensures that the output voltage remains constant even when the input or load requirement changes. This prevents stress on the internal circuits and maintain stability of the power supply.

Conclusion

The PT79SR108S is a reliable and efficient DC-DC converter which is ideal for use in a wide range of applications. Its wide range of adjustable outputs and low-power consumption make it suitable for use in portable electronics and medical equipment, where power requirements are often specific and require high levels of accuracy. Its feedback control system ensures that the power supply remains stable even when faced with changing load requirements.

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