LPS105-M Power Supplies - External/Internal (Off-Board)

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AC DC Converters

The AC-DC converter is an essential part of modern day electrical systems, allowing for efficient conversion of alternating current power into direct current power. The AC-DC converter typically consists of a rectifier, an inverter, and a controller. The rectifier takes an AC input and creates a DC output suitable for use in electronics, while the inverter takes a DC input and converts it back into an AC output. The controller monitors and controls the rectifier and inverter, and is responsible for generating the appropriate signals that instruct the rectifier and inverter to perform their respective tasks.

One such AC-DC converter is the LPS105-M. Designed by Texas Instruments, the LPS105-M is an air-cooled AC-DC converter suitable for applications in a variety of environments. Its power conversion efficiency is rated at 95%, making it suitable for use in applications where energy efficiency is desired. This converter has a maximum operating temperature of 100 °C and can handle up to 1.5 kW of power. It features a wide input voltage range of 85 – 295VAC, making it suitable for use with either 110VAC or 230VAC. It also has a wide operating frequency range of 47-63 Hz, making it suitable for use in a variety of world locations. The LPS105-M is a proven solution in demanding, harsh environments.

The key to the LPS105-M’s operation is a three-phase control strategy. It uses three cylindrical-shaped transformers that are connected in series and phase-shifted from one another. This allows the converter’s output to be controlled by the phase angle difference between the transformers. The LPS105-M also has a full-wave rectifier to rectify the incoming AC line voltage and a full-wave inverter to convert the DC voltage back to an AC output. The controller is also responsible for monitoring and controlling the operations of the rectifier, inverter and the three-phase transformers.

The LPS105-M is designed for a variety of applications, including motor drives, power factor correction, and uninterruptible power supplies. The power factor correction helps reduce energy losses and improve system efficiency. To further improve system performance, the LPS105-M utilizes a synchronous rectification technique to reduce the device’s switching losses. This converter is also suitable for use in systems that require overload protection or current limit protection. Its wide operating frequency range also makes it suitable for use in a variety of world locations.

In conclusion, the LPS105-M is a versatile AC-DC converter that is designed for a variety of applications. Its 95% power conversion efficiency and wide operating frequency range make it suitable for use in a variety of environments. It features a three-phase control strategy with a rectifier and inverter to produce an adjustable DC output, and utilizes synchronous rectification for improved system performance. This makes the LPS105-M an ideal choice for motor drives, power factor correction, uninterruptible power supplies, and other demanding applications. The LPS105-M’s features make it a reliable and efficient solution for a variety of applications.

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