Digital POL DC-DC converter range now offers 20A and 25A models

26-02-2015 | Murata | Power

Murata Power Solutions' OKDx-T/20-W12 and OKDx-T/25-W12 series point of load
(PoL) DC-DC converters offer high power density, high efficiency, PMBus
compatible digital power solution for space constrained embedded
applications such as powering CPUs, datacom/telecom systems, distributed bus
architectures (DBA), programmable logic, and mixed voltage systems in the
networking, computing/servers, telecom, and industrial market sectors.

Expanding its Okami(TM) range of non-isolated PoL DC-DC converters, Murata's
digitally controlled OKDx-T/20-W12 and OKDx-T/25-W12 are capable of
delivering 20A/66W and 25A/82.5W output respectively, yet these high
power-density modules measure just 25.65mm x 13.8mm x 8.2mm. Offered in
three different packages - through-hole, single-in-line and surface-mount -
the converters can easily be configured and monitored via the standard PMBus
communication protocol. Suitable for a wide range of applications, they
accept input voltages from 4.5V to 14V and have an output voltage range of
0.6V to 3.3V with a typical efficiency of 97.1% at 5Vin, 3.3Vout and at 50%
load.

The products are delivered with a default firmware configuration suitable
for a wide range of operation in terms of input voltage, output voltage, and
load. Both series' power management design includes advanced features like
non-linear transient response, phase spreading, synchronization, digital
current sharing, and optimized dead time control. In addition to all these
features, the 25A PoLs (OKDx-T/25-W12) 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. It measures the characteristics of the power
train, calculates the proper compensator PID coefficients and implements
them.

Other standard features include short-circuit, over-current, over-voltage,
over-temperature, input under-voltage protection, voltage margining and
tracking, power good, remote sense and remote on/off, says the company.

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