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270W 2 x 4in AC-DC supply in distribution

270W 2 x 4in AC-DC supply in distribution

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By Nick Flaherty



The XL270 Series provides single output variations of 12V, 24V, 30V, 48V and 56V models, but other voltage options in this range are possible. The XL270 is the first power supply in this market sector to use two digital signal processors (DSPs) to control its operation. The DSPs monitor output voltage and current along with transformer temperature, among other values. The microcontroller shuts down main output upon command, loss of input power or whenever excessive loads are encountered; advanced warning of an impending shutdown is provided before output power is lost. With over 100,000 lines of internal code, the XL270 can be modified via software to meet specific OEM needs.

The XL270 can be configured as an open frame unit, with a U-channel or an enclosed chassis. Features include up to a 93% efficiency rating, increased power density (>22 Watts per square inch), withstanding up to 2G vibrations.

An optional PMBus digital communications interface is available to allow up to six XL270s to communicate over the same bus using the PMBus protocol. This interface allows routine remote control of the main outputs and the 12V fans. The host can also query the DSP for its output voltage and current plus the ambient and transformer temperatures and fan tachometer speed. The programmable DSP code can be customised to meet unique requirements.

Luso Electronics; www.lusoelectronics.com

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