SKM30B-15

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DC DC Converters

A DC-DC converter is an electrical device that converts direct current from one voltage level to another. It is also known as a DC-to-DC converter or DC-to-AC converter. DC-DC converters are widely used in a variety of applications, from powering small electronics, communication equipment, home appliances, automotive systems, solar and wind-powered systems, and more.

SKM30B-15 Application Field and Working Principle

The SKM30B-15 is a DC-DC converter with power factor correction (PFC) capability. It uses synchronous rectifier technology to convert AC power input into a DC output of 15V. The conversion efficiency is up to 98%, and it comes with a wide input voltage range of 85-264VAC and a wide input frequency range of 47-63Hz making it ideal for a variety of application fields. Other features include low electromagnetic interference (EMI), compact size and high power density, full output power to a low output voltage, and protection from overload, short circuit or over temperature.

The working principle of the SKM30B-15 is based on the use of a constant frequency, zero current switching (ZCS) technique, which modulates the DC link voltage to eliminate the current ripple, resulting in improved energy conversion efficiency. This is made possible by the dual-bridge synchronous rectifier stage and the two-leg pre-regulated devices used to drive the converter’s secondary switches. The switching frequency of the converter is determined by the speed of the rectifier diodes and the gate-driver operation consistency, ensuring that the output voltage remains constant under large load changes or variations in the mains input voltage.

The SKM30B-15 is designed with a busy signal output that transmits a toggle pulse to indicate when the converter is in standby. It also offers six mode of power-saving options that minimize power consumption. The built-in powerful EMI filter helps reduce conducted and radiated emissions for compliance with the CE requirements for EMI. Additionally, all of the components used in the SKM30B-15 are designed to withstand high temperature and provide reliable operation in a harsh environment.

The SKM30B-15 offers a wide array of protection functions such as over-temperature, over-voltage, and over-current protection. Additionally, it is designed with over-voltage protection for both input and output voltage, as well as a frequency folding technique to protect the system against thermal runaway. Finally, the SKM30B-15 also comes with an adjustable output voltage trim function in order to meet different requirements.

The SKM30B-15 DC-DC converter is suitable for use in a wide variety of applications including industrial automation, consumer electronics, electric power supplies, UPS (Uninterruptible Power Supply) systems, and more. Due to its high efficiency, compact size, and low harmonics generation, it is becoming increasingly popular in various industries.

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