90A PMbus DC-DC converter targets FPGAs and processors

February 16, 2017 // By Nick Flaherty
Murata has launched a 94% efficient, 90 A, PMBus compliant point of load (PoL) DC-DC Converters targeted for FPGA & processor power applications
Murata has launched a 94% efficient, 90 A, PMBus compliant point of load (PoL) DC-DC converters for FPGA and processor power applications

The 62 W OKDx-T/90 series from Murata Power Solutions is the highest current-rated product in the OKD series, which already provides solutions from 6 A to 60 A for FPGA and processor power rails. The module is specified to operate over a Vin range of 7.5 V to 14 V and provides a user-adjustable Vout in the range of 0.6 V to 1.8 Vdc with a typical efficiency of 94% with 12 V in, 1.8 V out and 50 % load.

The module is available in three different package configurations: a Single Inline Package (SIP) measuring just 2.0 x 0.37 x 0.75 in (50.8 x 9.51 x19.05 mm); a horizontal mounting TH (Through-Hole) module; and surface mount (SMT) versions measuring 2.0 x 0.75 x 0.39 in (50.8 x 19.05 x 10 mm).

As a result the OKDx-T/90 is aimed at space-constrained embedded applications where performance is critical to the application. Critical performance parameters are fully accessible through the PMBus via the Murata Power Designer GUI software. The converters are delivered with a default firmware configuration suitable for a wide operating range in terms of input voltage, output voltage, and loading conditions.  

The converter’s proprietary digital control power management functions include a range of advanced performance-enhancing features. Its non-linear transient response greatly improves the dynamic response time, reducing Vout deviation due to large load changes; phase spreading reduces input capacitor requirements and efficiency losses. The synchronization feature eliminates beat frequency reflection, resulting in less EMI filtering, and digital current sharing ensures near 100% current sharing accuracy with up to four modules operating in parallel. The converters provide Dynamic Loop Compensation, where the feedback loop parameters are automatically calculated and configured depending on the unique application-specific operating conditions.