GE targets controllability for long awaited second generation of digital DC-DC converters

May 18, 2017 //By Nick Flaherty
The PJT020 pico DLynx II point of load PoL digital module
GE has launched its second generation of point of load (PoL) DC-DC converters after six years, adding controllability, more digital features, greater density and a broader range of applications enabled by higher current PoLs.

The DLynx II family of PoL modules offers a range of products from 4 to 170 A. Among the assortment of modules in the platform is the TJT170, the highest current PoL unit available today. The unit offers a 96% efficiency and 50% load step transients of less than 20 mV.

Dlynx was developed by Lineage Power and launched in September 2010. Lineage was acquired by GE from the Gores private equity group soon after in March 2011. 

The new family also includes the micro-sized UJT035 and pico-sized PJT020 modules, which offer high current density in industry-standard (DOSA-compatible) footprints. The improved power density equates to more available space on the board for other important features to be integrated into an end product. The 20A PJT020 for example measures 12.2 x 12.2 x 8.5 mm (0.48 x 0.48 x 0.335 in)

“Today’s board designers find themselves facing the conundrum of needing to improve processing power, performance and efficiency without increasing the footprint of their power equipment,” said Vesa Jokitulppo, senior product manager, GE’s Industrial Solutions. “Our new DLynx II family of DC-DC converters provides the tighter voltage control, accurate digital telemetry, higher current capabilities and higher efficiencies that are required throughout the industry while also remaining conscious of how valuable every square inch of freed up board space can be.”

The modules provide the tighter, more accurate voltage control often needed in today’s advanced, high-performance processors. The high current modules also feature digital compensation, which enables increased flexibility for wider operating conditions — providing better control in a wide range of applications. These features better enable users to design, troubleshoot and optimize their end products. 

The digital modules use the PMBus standard for communication and control for power, linking seamlessly with software tools such as GE’s Digital Power Insight software. This helps designers optimise their original board designs and improve the field performances of their final products. Analogue versions without PMBus also are available for 7 to 20 A modules.

“At the