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50A digital PoL DC/DC converters support 4.5-14VDC input

Posted: 24 Dec 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Murata? DC/DC converter? PMBus? point-of-load?

Murata Power Solutions has rolled out a line of 50A digitally-controlled point-of-load (PoL) DC/DC converters available in three different package formats: through-hole, single-in-line and surface-mount. The OKDx-T/50 series devices extend the company's Okami range of non-isolated converters and can deliver 50A/165W from a high power density module measuring only 30.85 x 20 x 8.2mm.

The PoLs can be configured and monitored using industry-standard PMBus commands and have exactly the same footprint as the 40A OKDx-T/40 series released by Murata in September and have 25 per cent higher power density. In addition to all the features of the 40A, this series also has 'dynamic loop compensation,' where the PID parameters of the control loop are automatically calculated and configured depending on the operating conditions and output filter.

40A OKDx-T/40 series

Another additional feature is the 'non-linear transient response' that decreases response time and output voltage deviation. Other notable functions include phase spreading to reduce input capacitance requirements and efficiency losses and optimised dead time control that constantly adjusts dead time non-overlap in order to minimise duty cycle and maximise efficiency. Digital current sharing enables 100 per cent current sharing accuracy with up to seven PoLs in parallel.

The OKDx-T/50 series accommodates input voltages in the range 4.5-14VDC and provides a configurable output voltage from 0.6-3.3VDC. Typical efficiency is 97.2 per cent at 5Vin, 3.3Vout and with 50 per cent load.

Standard safety features are output short circuit, overcurrent, output overvoltage and input undervoltage protection. Power good, remote sense and remote on/off are also included.

Typical applications for the OKDx-T/50 are telecommunications, wireless infrastructure and data networking equipment.

Lead-time is from stock to 12 weeks. Pricing in OEM quantities is at $21.90.

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