PT7743N

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DC-DC converters are commonly used in electrical and electronic applications. They are components that convert one DC voltage to another DC voltage, either higher or lower than the original (though DC-AC converters are also available). The PT7743N is an example of a DC-DC converter, and is a type of switching converter. This article will discuss the application field and working principle of the PT7743N.

The PT7743N is a dual-channel, ultra-low-noise DC-DC converter developed by TDK-Lambda. It is designed for applications that require noise-free power, and is ideal for providing local power to remote and distributed equipment. It is particularly suited to applications requiring high power efficiency, such as medical, imaging and industrial equipment. Its wide input and output voltage ranges make it capable of operating from a variety of different AC and DC sources.

The PT7743N has two channels that can be used independently or operated as a single channel. Each channel is capable of delivering up to 500mA of output current, and the input voltage can range from 5-60V DC. The input and output isolation is 1500V. The unit features over-voltage and over-current protection, as well as a keep-alive function that maintains the output voltage in the event of a short circuit.

The PT7743N uses a topology that combines buck, boost, and flyback converters to enable the conversion of a wide range of input and output voltages. The buck converter is used to convert the DC input voltage to a lower DC voltage, while the boost and flyback converters are used to convert the lower DC voltage back up to the desired output voltage. This topology maintains a high efficiency across a wide range of input and output voltages.

The PT7743N also features a comprehensive control system that provides tight control of the output voltage and current. It includes an on-board voltage and current supervisor, as well as external voltage and current sense pins. This allows the converter to actively monitor the output of the converter and make adjustments to maintain a stable output voltage and current. The control system also offers programmable regulation voltages, as well as under- and over-voltage protection.

In addition, the PT7743N has a low ripple and low noise operation due to its use of switching frequencies of 100kHz or higher. This makes it suitable for noise-sensitive applications, such as medical, imaging and industrial equipment.

The PT7743N is a reliable, high-efficiency DC-DC converter that is ideal for providing local power to remote and distributed equipment. It is especially suitable for applications that require noise-free power, such as medical, imaging and industrial equipment. Its wide input and output voltage ranges, combined with its comprehensive control system and low ripple and noise operation, make it an ideal solution for these types of applications.

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