Datasheet

EMC Specifi cation
Conducted EMI measured according to test set-up below. The funda-
mental switching frequency is 320 kHz at VI = 12 V, max IO.
Layout Recommendations
The radiated EMI performance of the product will depend on the PWB
layout and ground layer design. It is also important to consider the stand-
off of the product. If a ground layer is used, it should be connected to the
output of the product and the equipment ground or chassis.
A ground layer will increase the stray capacitance in the PWB
and improve the high frequency EMC performance.
Output Ripple and Noise
Output ripple and noise is measured according to fi gure below.
A 50 mm conductor works as a small inductor forming together with the
two capacitors as a damped fi lter.
Operating information
Power Management Overview
This product is equipped with a PMBus interface. The product incorpo-
rates a wide range of readable and confi gurable power management
features that are simple to implement with a minimum of external
components. Additionally, the product includes protection features
that continuously safeguard the load from damage due to unexpected
system faults. A fault is also shown as an alert on the SALERT pin.
The following product parameters can continuously be monitored by a
host: Input voltage, output voltage/current, and internal temperature. If
the monitoring is not needed it can be disabled and the product enters
a low power mode reducing the power consumption. The protection
features are not affected.
The product is delivered with a default confi guration suitable
for a wide range operation in terms of input voltage, output volt-
age, and load. The confi guration is stored in an internal Non-Volatile
Memory (NVM). All power management functions can be reconfi gured
using the PMBus interface. Please contact your local Murata Power
Solutions representative for design support of custom confi gura-
tions or appropriate SW tools for design and download of your own
confi gurations.
Input Voltage
The input voltage range, 4.5 - 14 V, makes the product easy to use in
intermediate bus applications when powered by a non-regulated bus
converter or a regulated bus converter. See Ordering Information for
input voltage range.
Conducted EMI Input terminal value (typical for default confi guration)
EMI without fi lter
Conducted EMI test set-up
RF Current probe
C1
1kHz – 50MHz
To spectrum
analyzer
POL
load
Resistive
supply
Battery
800mm
200mm
50mm
C1 = 10uF / 600VDC
Feed- Thru RF capacitor
Output ripple and noise test set-up.
Vout
+S
–S
GND
Ceramic
0.1 µ F
Capacitor
Tantalum
Capacitor
10 µ F
Load
50 mm conductor
BNC-contact to
50 mm conductor
oscilloscope
Output
Capacitor
470 µ F/10 m Ω
OKDx-T/50-W12-C
50A Digital PoL DC-DC Converter Series
MDC_OKDx-T/50-W12-C.A04 Page 19 of 41
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