AC/DC power supply modules target space-constrained applications

XP Power has introduced a range of low-profile, half-brick, baseplate cooled AC/DC power supply modules that require no external circuitry for operation or EMC compliance. The ASB75 series offers fanless power with baseplate cooling for applications such as information technology equipment (ITE), internet of things (IoT), industrial, and harsh or rugged applications.

The baseplate cooling enables operation in sealed metal enclosures using passive cold wall cooling to transfer any heat to the outside of the equipment. An optional heat sink is also available pre-mounted or separately, allowing designers to use conventional convection or forced air cooling where preferred.

The AC/DC power supplies deliver up to 75 W of power from a universal (90-264 VAC) input and feature an integral AC fuse, EMC filter, and hold-up capacitor that simplifies integration while reducing space required for the solution. The five models, available in the series, offer single output voltages of 12 V, 15 V, 24 V, 36 V or 48 V.

The efficiency levels as high as 90% minimize heat generation and contribute to a high-power density of 20 W/in³ in an industry standard half-brick package, measuring 2.28 × 2.40 × 0.67” (57.9 × 61.0 × 17.0 mm). With a no-load current draw of less than 150 mW of power, the ASB75 models significantly reduce the standby power needs of end equipment, enabling them to meet current efficiency standards, said the company.

The AC/DC power supply modules provide EMC compliance with no external components required to meet EN55032 Level B for conducted and radiated emissions as well as offer immunity to meet EN61000-4. They are also compliant to safety standard UL/EN/IEC62368-1.

The encapsulated devices provide built-in protection for over-temperature, overcurrent, overvoltage, and output short-circuit, which protects the device as well as any load that it is powering, said XP Power.

A baseplate operating temperature of -40°C to 85°C ensures that ASB75 devices are suited to a wide range of application environments while full encapsulation increases reliability in harsh environments and applications that require rugged devices. Devices come with a three-year warranty.

The ASB75 series is priced from $77.32 for 500+ piece quantities. The power supplies can be purchased direct from XP or through is distribution partners including Allied Electronics, Digi-Key, Mouser, and Newark.