Intermediate bus converter targets ATCA applications

28th November 2014
Siobhan O'Gorman

Targeting ATCA (Advanced Telecommunications Computing Architecture) applications, the PKM4613ANH 580W high-power DC/DC Intermediate Bus Converter (IBC) module has been introduced by Ericsson. The Hybrid Regulated Ratio (HRR) topology based device delivers a regulated output voltage that not only complies with standardised system voltages for telecomms applications, but also ATCA input voltage requirements, including a stable voltage supply from 40.5V.

To ensure systems are ready to operate at minimum ATCA voltage requirements, even in low temperature environments or in case of power line disturbances, the module guarantees tightly regulated 11.6V output voltage at 50A (580W) from 38.5V. Operation up to 75V with no derating is guaranteed by the built-in HRR technology, which complies with telecomm applications and the ETSI EN 300 132-2 European Standard for both 48 and 60V systems.

Delivering an efficiency of 96.4% at 48V input, 50% load, the PKM4613ANH has an overall operating input voltage range from 36 to 75V. When the device is in standby mode, power consumption as low as 0.3W is enabled by its built-in low-power controller. Making it possible to access system power information via the communication bus, the module can be used with the company’s PIM4328PD Power Interface Module with PMBus interface in ATCA implementations.

The open frame version of the PKM4613ANH measures 57.9x36.8x11.4mm, while the baseplate version measures 57.9x36.8x14.3mm. The device features the industry-standard double-power-pin option. Enabling compatibility with lower power quarter-brick modules and making it possible to access more power in legacy boards when updating processors and memories, a single-power-pin option is also available. To further enhance pin quality, the module is available with four gold-finished pin lengths: 5.33mm as standard, together with three additional options of 4.57mm (LB), 3.69mm (LA) and 2.79mm (LC). This removes an extra operation to cut the pins after final assembly, reducing assembly time and cost.

The PKM4613ANH-PI features 2250V I/O isolation meeting functional isolation and 1500V basic isolation requirements to provide protection. Other features include input over-voltage suppression, soft-start for handling of high capacitance loads, delayed hiccup over-current protection, over-temperature protection, over-voltage and under-voltage lockout, and pre-bias startup functionality.

“Although ATCA applications today require an average power of 300W per board, increasing demand for greater integration and higher levels of computing power means that ATCA and other telecommunications applications will require even more powerful converters in the near future,” said Patrick Le Fèvre, Marketing and Communication Director, Ericsson Power Modules. “This application-specific power module has been specially designed to meet the demands of ATCA and fulfills high energy efficiency requirements while also being able to deliver stable voltage across its full operating range.”

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