IN Brief:
- Seven LBA models provide rated outputs from 35W to 350W and regulated voltages from 5V to 48VDC.
- Units up to 200W use convection cooling, while the 350W model incorporates a fan.
- The range targets industrial controls, building systems, security equipment, and general embedded electronics.
XP Power has introduced a family of enclosed AC/DC power supplies covering rated outputs from 35W to 350W for industrial controls, building equipment, security systems, and embedded electronics.
The LBA series provides regulated outputs from 5V to 48VDC and accepts a universal input from 90VAC to 264VAC. Adjustable output voltage allows each model to accommodate distribution losses and the tolerance requirements of its connected load.
Efficiency reaches 90% on selected units, while active power-factor correction is incorporated where required by the power level. Reducing harmonic current supports compliance and limits unnecessary loading of cables, protective devices, and upstream distribution equipment.
The 35W and 50W supplies measure 99mm × 82mm × 30mm, while the 75W model extends the depth to 97mm. Units up to 200W rely on convection cooling, whereas the 350W version incorporates a fan to maintain its rated output within the available enclosure volume.
Operation is specified from −30°C to 70°C, subject to model-specific derating. Screw-terminal connections are fitted within the enclosed chassis-mount format, and an optional terminal cover can provide additional protection during installation and servicing.
Protection functions cover short circuit, over-current, over-voltage, and over-temperature conditions, with remote on and off control available on selected models. The range carries information-technology equipment approvals, Class I construction, and Class B conducted and radiated emissions compliance.
Using one supply family across several equipment variants can simplify mechanical design and qualification. A basic control platform may use a lower-rated unit, while versions carrying more displays, communications, actuators, or processing can move to a larger model without changing the general installation method.
Electrical and thermal behaviour nevertheless changes considerably across the range. A fanless 200W supply depends on enclosure airflow, orientation, ambient temperature, and available metalwork, whereas the fan in a 350W unit introduces acoustic noise, contamination paths, and a finite-life moving component.
Efficiency affects both energy use and component temperature because every watt lost becomes heat inside the equipment. Elevated temperature accelerates ageing in electrolytic capacitors, optocouplers, and other sensitive parts, so measurements at the expected operating load carry more weight than a single peak-efficiency figure.
Industrial loads also vary sharply. Motors, heaters, valves, radios, and processors can create abrupt current steps, while long cables add resistance and inductance. The supply must recover without resetting a controller, corrupting communications, or disturbing analogue measurements elsewhere in the machine.
Hold-up behaviour determines how the equipment responds to mains interruption. A brief dip may need to be ridden through, while a longer failure may require the processor to store data, stop an actuator, or place the process in a defined state before the DC rails collapse.
Although an enclosed supply may meet emissions limits independently, EMC compliance still depends on the completed machine. Protective-earth routing, cable screens, enclosure bonding, switching loads, input filtering, and output-return paths can alter conducted and radiated behaviour substantially.
Power architectures are becoming more distributed as high-current local converters, including 10A point-of-load devices, feed processors and FPGAs close to the load. At higher voltages, 2,300V SiC modules are increasing switching speed and power density in industrial conversion stages.
An AC/DC front end increasingly establishes an intermediate bus, with downstream converters generating tightly regulated rails for processors, sensors, communications, and analogue circuitry. Startup sequencing, loop interaction, inrush current, and protection must be coordinated across those stages.
Lifecycle support also affects the suitability of a power supply selected for industrial equipment. A withdrawn or substantially revised module can force mechanical changes, EMC work, and renewed safety assessment long after the original product entered production.
The LBA series uses a conventional enclosed format rather than pursuing maximum open-frame density. That arrangement suits equipment in which mechanical protection, accessible terminals, and predictable mounting outweigh the smallest possible footprint, provided thermal derating is verified within the finished enclosure.
