PT78NR103S

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DC-DC converters are essential components for electronic products and have wide application fields. PT78NR103S is one of the DC-DC converter products developed and manufactured by Perfect Technology Corporation. This converter\'s features provide multiple power conversion functions such as wide input ranges and high efficiency. It also has multiple protection functions like over current, over voltage, short circuit, and temperature protection.

The PT78NR103S is a synchronous buck converter with peak efficiency of 97.5%. It can provide output voltage of 5.5V. The adjustable output voltage ranges from 4.5V to 5.5V while the wide input range ranges from 8V to 36V. The maximum output current is 3A and the output ripple voltage is 50mV. It has a built-in switching frequency of 500kHz and a fast load transient response. It also has a enable function which can reduce output power and power dissipation with a low off current of ≥ 1µA. Additionally, it has built-in protection for over-current, over-voltage, short-circuit, and over-temperature.

Generally, the working concept of PT78NR103S is the same of other buck converters: the input voltage is stepped down to a voltage lower than the input voltage by a switching transistor, and then the output voltage is regulated. This converter has an output transistor to step down the voltage while the switching transistor switches ON and OFF which is called the duty cycle. Both the output transistor and the switching transistor are controlled by the control circuit providing constant output voltage. The two transistors also provide the high efficiency. The switching frequency can also be adjusted to provide a more steady output voltage.

Since the PT78NR103S buck converter is of small size and light weight, it has several application fields. It can be used in the medical field where it can be used for medical equipment, such as ventilators, X-ray detectors, and ultrasounds. It can also be used in the automotive field, primarily for in-vehicle electronics for operations such as power windows, ECU and various sensors. Additionally, it can be used in the industrial field where it can be used for control systems, communications, industrial equipment and various kinds of sensors.

In conclusion, the PT78NR103S DC-DC converter from Perfect Technology Corporation is an efficient converter with wide input range and multiple output voltage levels. It has a high efficiency of 97.5%, a switching frequency of 500kHz and provides multiple protection functions. It also has multiple applications in the medical, automotive, and industrial fields.

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