PT78NR105ST

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DC DC Converters come in many different shapes and sizes, and PT78NR105ST is one of them. This type of DC DC converter has specific applications and specific working principles. This article will explore these aspects in greater detail.

Applications for PT78NR105ST

PT78NR105ST is an isolated DC DC converter which converts DC input voltage to a higher output voltage. It is widely used in telecommunication server and power applications. It is especially suitable for powering semiconductor devices which require isolated voltage. This DC DC converter is also known for its high power density, as it can deliver power up to 67.5 watts. It is capable of producing output power up to 5.2A at 12V and up to 4.2A at 15V.

PT78NR105ST also has applications in vehicles, medical instruments, portable electronic equipment, household and industrial appliances, automation systems, energy management devices, security equipment, and so forth. It is well-suited for controlling the voltage and current flow in various devices, and it can also improve the stability of the DC power supply. The wide input voltage range, low ripple & noise, and the short circuit protection (SCP) feature make this DC DC converter an ideal choice for those applications.

Working Principle

PT78NR105ST works by converting the DC input voltage into a higher output voltage. The input can be either 12 to 48V DC, while the output is adjustable from 12 to 15V DC. It is also capable of delivering up to 67.5 watts of output power.

Basically, the DC DC converter comprises a switching DC/DC regulator and a two-stage PFC (power factor correction) circuit. The two-stage PFC circuit consists of a PFC pre-regulator and a PFC boost converter. This two-stage PFC allows the converter to accept wide range input voltages and reduce input current harmonic distortion.

The switching regulator is based on a high frequency current-mode pulse-width modulation (PWM) control. This ensures high efficiency and low audible noise. The high frequency PWM ensures fast load transient and better line and load regulation. In addition, the PWM switching action minimizes electromagnetic radiation and thus extends the service life of electronic components.

The PT78NR105ST converter has several traits that make it an ideal choice for protecting the connected devices. It has an output over-voltage protection, output short-circuit protection (SCP), and over-temperature protection (OTP) functions. It also has input under-voltage protection and output current limiting protection. All these features serve as a safeguard for the connected devices.

In summary, PT78NR105ST is an isolated DC DC converter that is tailored for powering applications that require voltage isolation. It has wide input voltage range, low ripple & noise, and a short-circuit protection feature that make it an ideal choice for controlling the voltage and current flow in various devices. It also features several protective circuits that protect the connected devices from overvoltage, short circuit, and over temperature conditions.

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