Digitally controlled PoL converters are PMBus compatible

16th March 2016

Nat Bowers

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Expanding its Okami series of non-isolated PoL DC/DC converters, Murata Power Solutions has announced a range of digitally controlled OKDL products. The OKDL-T/6-W12, OKDL-T/12-W12 and OKDL-T/18-W12, delivering 6, 12 and 18A respectively, are capable of being monitored and configured via PMBus communications.

The new models accept input voltages from 4.5 to 14V and have an adjustable output voltage range from 0.6 to 5V (1.8V maximum for 18A model). Designed for a minimal footprint, the high-power-density LGA modules measure just 12.2x12.2x8.0mm (0.48x0.48x0.315"). The OKDL converters offer a typical efficiency figure of 91.6% at 12V_IN and are able to operate over a temperature range from -30 to +95°C.

The wide operating temperature range makes these devices suited for applications such as networking, computing, servers, telecomms, industrial and other distributed power applications. The OKDL products are designed to power low-voltage silicon devices such as CPUs, FPGAs, MCUs, logic circuits, memory and other analogue/digital devices in mixed voltage systems.

With their digital control and PMBus compatibility, the converters offer easy user configuration and monitoring. All power management functions can be reconfigured for user-specific needs using the PMBus interface.

Short circuit, over current, over voltage, over temperature and input under voltage protection, voltage margining and tracking, power good, remote sense and remote on/off are included as standard features. The converters employ adaptive compensation of the PWM control loop, a phase spreading feature to reduce input capacitance, synchronisation to reduce EMI filtering and an optimised dead time control. The OKDL converters are delivered with a default firmware configuration suitable for a wide range of input voltage, output voltage and load.

The OKDL products comply with the new picoAMP standard from the Architects of Modern Power (AMP) group of companies, which guarantees customers multiple sources of interoperable products.

Bill Smith, Product Manager, Murata Power Solutions, commented: “In the ever-changing and complex world of electronics, power systems are becoming more and more complicated. Power systems engineers face difficult challenges delivering low voltage, high current rails to FPGAs, ASICS and other critical electronic circuits. The OKDL series of PMBus compliant PoLs delivers unmatched versatility for precise control and monitoring of the most sophisticated power systems. Murata is pleased to deliver the OKDL series to our customers and support the AMP alliance with these picoAMP compliant products.”