Efficient power modules feature wide input voltage range

16th December 2014
Barney Scott

Ericsson has introduced the PKB5000W series of open-frame isolated 120W eighth-brick DC/DC power modules that offer high current output and high efficiency. Importantly, the PKB5000W module features an ultra-wide input range of 18 to 75VDC, which means that the device is also suitable for 24 or 48V telecomms.

Joining the recently announced PKU5510E, PKE5000 and PKE3000, the PKM5000W series expands upon Ericsson’s portfolio of converters that offer highly flexible power conversion to applications that require an ultra-wide input voltage range.

The PKM5000W comes in the industry-standard through-hole eighth-brick format, measuring 58.4x22.9x9.91mm (2.3x0.9x0.39"). In addition to the open-frame version of the module, an optional baseplate version is also available for applications that require conduction cooling.

Offering outstanding thermal performance and derating capabilities, the module delivers typical efficiency of 91.5% at 12V full load. The single output units offer the nominal outputs of 3.3, 5 or 12VDC with maximum outputs of up to 30A and 120W. Maximum outputs of specific models in the series include: the PKB5110WPI with 3.3V, 30A and 99W; the PKB5111WPI with 5V, 20A, and 100W; and the PKB5113WPI with 12V, 10A and 120W.

The PKM5000W series operates over the -40 to +110°C temperature range and provides 2250VDC I/O isolation meeting functional isolation and 1500V basic insulation safety requirements, according to IEC/EN/UL 60950-1. Other protection features include output-over-voltage protection; input-under-voltage shutdown; over-temperature protection; and output short-circuit protection. The module also has remote sense capability, which can be used to compensate for up to 5% voltage drops between the output pins and the POL.

The PKM5000W power modules are also fitted with a remote control function, with negative and positive logic options available, allowing the product to be turned on/off by an external device such as a semiconductor or mechanical switch, providing the ability to remotely schedule load startup.

“With the launch of the PKB5000W series, Ericsson is further expanding its portfolio of high-efficiency DC/DC converter modules that offer an ultra-wide-input voltage range,” said Patrick Le Fèvre, Marketing and Communication Director, Ericsson Power Modules. “These highly flexible power converters will enable Ericsson to meet a myriad of high-density applications in telecommunications and industrial markets, in particular to support the growing demand in mini and micro radio base stations and other leading-edge networking equipment.”

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