MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 1 of 6
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FEATURES
3rd ed. medical and ITE safety approved
400W compact high density
3" x 5" standard footprint
High effi ciency up to 94%
Remote sense
Remote On/Off, Power OK
Universal AC input with active PFC
Less than 1U high – 1.4"
Convection cooled operation up to 250W
Isolated 12V@1A fan output
Isolated 5V@2A standby output
RoHS compliant
Active inrush protection
Current sharing option
DESCRIPTION
The MVAC400 series switching power supplies
utilize advanced component and circuit
technologies to deliver high effi ciency. Designed
for medical, computing, communications, telecom
and other OEM applications to satisfy 1U height
design considerations, the MVAC400 Series
measures only 3.0" x 5.0" x 1.40". All models
offer universal AC input with active power factor
correction (PFC) and compliance to worldwide
safety and EMC standards.
ORDERING GUIDE
Model Number* Natural Convection Cooling Forced Air Cooling Main Output
(V1)
Fan Output
(V2)
Aux Output
(V3)
MVAC400-12AF
250W 400W @ 250LFM
12V 12V 5V
MVAC400-24AF 24V 12V 5V
MVAC400-48AF 50V 12V 5V
* Refer to page 2 for current sharing model numbers MVAC400-xxAFD
INPUT CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Input Voltage Operating Range* Single phase 90 115/230 264 Vac
Input Frequency 47 50/60 63 Hz
Turn-on Input Voltage Input rising 80 90 Vac
Turn-off Input Voltage Input falling 70 80
Input Current 90Vac input, full load all outputs 5.5 A
No Load Input Power7(PS_ON = OFF, 5V_Aux = 0A) 1.5 2.0 W
Inrush Current At 264Vac, at 25°C cold start 15 Apk
Power Factor At 230Vac, full load 0.98
* DC Input 127-300Vdc optionally available; contact your Murata salesperson.
OUTPUT CHARACTERISTICS
Model Number Main Output
Voltage (V1) Load Current Maximum Load
Capacitance
Line, Load, Cross
Regulation6
Typical Effi ciency
@230Vac
MVAC400-12AF 12V 0 to 33.3A 0 to 2200µF ± 1% 93%
MVAC400-24AF 24V 0 to 16.7A 0 to 470µF ± 1% 93%
MVAC400-48AF 50V 0 to 8.0A 0 to 150µF ± 1% 94%
Main Output Characteristics (all models)
Parameter Conditions Typ. Max. Units
Transient Response 50% load step, 1A/µsec slew rate ± 5 %
Settling Time to 1% of Nominal 500 µsec
Turn On Delay After application of input power 3 sec
Output Voltage Rise Monotonic550 msec
Output Holdup 120Vac/60Hz, full load 20
Temperature Coeffi cient 0.02 %/°C
Ripple Voltage & Noise11%
Remote Sense
Compensates for up to 0.5V of lead drop with
remote sense connected. Protected against
short circuit and reverse connection.
500 mV
Auxilliary Output Characteristics (all models)
Auxilliary Output Aux Output
Voltage8Load Current Load Capacitance Line, Load, Cross
Regulation3
Ripple Voltage &
Noise1
Fan (V2) 12V 0 to 1A 0 to 220µF ± 10% 2%
Aux (V3) 5V 0 to 2A 0 to 220µF ± 5% 1%
1. Noise and ripple is measured at an oscilloscope jack on the output, 20MHz bandwidth, and with 0.1µF ceramic and 10µF aluminum
electrolytic capacitors across the output pins.
2. Unless otherwise specifi ed all measurements are taken at 120Vac input and 25°C ambient temperature.
3. Fan (V2) regulation band applies from 0.1A to 1A load with a minimum of 10W load on the main (V1) output.
4. Fan (V2) has overvoltage protection (tracking V1) and short circuit protection. Overloading the Fan (V2) output can result in perma-
nent damage to the unit.
5. 24V and 50V models may exhibit up to 5% turn on overshoot for loads less than 4% of full load.
6. Load regulation for droop version models (MVAC400-xxAFD) is based the calculated droop voltage ±1.5% (see current sharing section
for droop characteristics).
7. No load Input power varies by model and by input line. Measurement is diffi cult to make due to burst mode operation. Please contact
Murata sales if additional information is required.
8. All three output returns are isolated from each other (see isolation characteristics section); the returns may be tied together externally.
CB
Test Certifi cate
and Test Report PENDING
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MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 2 of 6
www.murata-ps.com/support
ENVIRONMENTAL CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Storage Temperature Range -40 85
°C
Operating Temperature Range
Full load -10 50
See thermal derating curves -10 70
Start up -20
Operating Humidity Non-condensing 10 95 %
Operating Altitude -200 3000 m
MTBF Telcordia SR-332 M1C3 @25°C 474K Hours
Shock Operating, MIL-HBK-810E Complies
Non-operating, MIL-HBK-810E Complies
Operational Vibration IEC-68-2-27 standard Complies to levels of IEC721-3-2
Safety
IEC60950-1:2006/A11:2009
UL60950-1 2nd Ed. 2007-03-27, CSA22.2 N0.60950-1 2nd Ed. 2007.03,
EN60690-1:2006+A11:2009 (Pending)
IEC60601-1 Ed. 3 MOOP
ANSI/AAMI ES60601-1 (2005+C1:09+A2:10), CSA 22.2 No. 60601-1 (2008) 3rd Edition MOOP
EN60601-1:2006 3rd ed.MOOP (Pending)
CE Marking per LVD
Warranty 2 years
Outside Dimensions 3.0" x 5.0" x 1.4" (76.2mm x 127mm x 35.6mm)
Weight 0.8lbs (362.87g)
RESIDUAL RISK (PER ISO 14971 & IEC60601-1) FOR USER CONSIDERATION
Fault Condition Residual Risk
Complies Contact your Murata salesperson for details
PROTECTION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Over Voltage Protection4V1 (main output) latching 110 125 %
V3 (aux output) latching 5.5 7.5 V
Over Current Protection4V1, hiccup mode 110 130 %Amax
V3, auto-recovery 110 150
Over Temperature Protection Auto-recovery Complies
Remote Sense Short Circuit Protection Complies
Remote Sense Reverse Connection Protection Complies
ISOLATION CHARACTERISTICS
Parameter Conditions Min. Typ. Max. Units
Isolation Primary to Chassis 1500
Vac
Primary to Secondary 3000
Secondary to Chassis 500
Output to Output 500
Earth Leakage Current (under single fault condition) 264Vac, 60Hz, 25°C 300 µA
Earth Leakage Current (under normal conditions) 264Vac, 60Hz, 25°C 150 µA
CURRENT SHARING OPTION – MVAC400-xxAFD ONLY
Model Number Description
MVAC400-12AFD
MVAC400-24AFD
MVAC400-48AFD
Current Sharing Notes:
Main Output: Current share is achieved using the droop method. Nominal output voltage is achieved at 50% load and output voltage drops at
a rate of 30mv per amp for 12V output, 120mV per amp for 24V output, and 500mV per amp for 50V output. Startup of parallel power supplies
is not internally synchronized. If more than 400W combined power is needed, start-up synchronization must be provided by using a common
PS_ON signal. To account for ±10% full load current sharing accuracy and the reduction in full load output voltage due to droop, available
output power must be derated by 15% when units are operated in parallel. Current sharing can be achieved with or without remote sense
connected to the common load. If ORing protection is desired, please contact Murata sales for external ORing FET board or external ORing FET
reference circuit design.
Aux (V3) output can be tied together for redundancy but total combined output power must not exceed 10W, external ORing devices must be
used.
Fan (V2) can be tied together for redundancy but total combined output power must not exceed 12W, external ORing diodes can be used.
MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 3 of 6
www.murata-ps.com/support
EMISSIONS AND IMMUNITY
Characteristic Standard Compliance
Input Current Harmonics IEC/EN 61000-3-2 Class A
Voltage Fluctuation and Flicker IEC/EN 61000-3-3 Complies
Conducted Emissions EN 55022 Class B
FCC Part 15 Class B
ESD Immunity IEC/EN 61000-4-2 Level 4, Criterion 2
Radiated Field Immunity IEC/EN 61000-4-3 Level 3, Criterion A
Electrical Fast Transient Immunity IEC/EN 61000-4-4 Level 4, Criterion A
Surge Immunity IEC/EN 61000-4-5 Level 3, Criterion A
Radiated Field Conducted Immunity IEC/EN 61000-4-6 Level 3, 10V/m, Criterion A
Magnetic Field Immunity IEC/EN 61000-4-8 Level 3, Criterion A
Voltage dips, interruptions IEC/EN 61000-4-11 Level 3, Criterion B
EMI CONSIDERATIONS
For optimum EMI performance, the power supply should be mounted to a metal plate grounded to all 4 mounting holes of the power supply. To comply
with safety standards, this plate must be properly grounded to protective earth (see mechanical dimension notes). Pre-compliance testing has shown the
stand-alone power supply to comply with EN55022 class A radiated emissions. Radiated emission results vary with system enclosure and cable routing
paths.
STATUS AND CONTROL SIGNALS
Parameter Conditions
PS_ON This signal must be sinked low (>2mA) to +5V_AUX_RTN to turn on the main and Fan (V2) output. The +5V_AUX output is on when AC is applied.
PWR_OK Open collector logic goes high 50-200 msec after main output is in regulation; it goes low at least 6 msec before loss of regulation. Internal 10K pull up to
+5V_AUX is provided.
EFFICIENCY PLOTS
84
85
86
87
88
89
90
91
92
93
94
95
0 102030405060708090100
Eff. %
Load %
MVAC400-12 Efficiency (including 5V Aux Output)
230 Vin
115 Vin
90 Vin
84
85
86
87
88
89
90
91
92
93
94
95
0 102030405060708090100
Eff. %
Load %
MVAC400-24 Efficiency (including 5V Aux output)
230 Vin
115 Vin
90 Vin
84
85
86
87
88
89
90
91
92
93
94
95
0 102030405060708090100
Eff. %
Load %
MVAC400-48 Efficiency (includes 5V Aux output)
230 Vin
115 Vin
90 Vin
MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 4 of 6
www.murata-ps.com/support
THERMAL CONSIDERATIONS
System thermal management is critical to the performance and reliability of the MVAC series power supplies. Performance derating curves are provided
which can be used as a guideline for what can be achieved in a system confi guration with controlled airfl ow at various input voltage conditions.
The air fl ow curves are generated using an AMCA 210-99 and ASHRAE 51-1999 compliant wind tunnel with heated inlet air and a controlled CFM
providing a duct test section having a calculated average LFM. A correlation between the test setup and the actual system environment is paramount to
understanding what can be achieved in an actual system. In a power supply of this density, cooling air moving both through the unit as well as around the
unit strongly infl uences local temperatures. The wind tunnel test setup was constructed to produce a fl ow with a slight back pressure to induce both fl ow
conditions by providing a small gap between the power supply and duct walls of 0.5" (13mm). The optimal and characterized airfl ow direction is from the
input connector to the output connector (see diagram below). The P-Q fl ow curve for this test setup is also shown below.
The natural convection data is obtained from a horizontally mounted power supply with un-obstructed fl ow at room temperature. At elevated temperature
the power supply data is taken while it is surrounded by a large vented enclosure to minimize forced cross fl ows inherent in the elevated temperature test
system.
50
100
150
200
250
300
350
400
450
10 20 30 40 50 60 70
Output Power (Watts)
Ambient Temperature (Degrees C)
Power Rating at 230Vac
350LFM
250LFM
Nat Conv
50
100
150
200
250
300
350
400
450
10 20 30 40 50 60 70
Output Power (Watts)
Ambient Temperature (Degrees C)
Power Rating at 120Vac
500LFM
350LFM
250LFM
Nat Conv
50
100
150
200
250
300
350
400
450
10 20 30 40 50 60 70
Output Power (Watts)
Ambient Temperature (Degrees C)
Power Rating at 90Vac
500LFM
350LFM
250LFM
Nat Conv
50
100
150
200
250
300
350
400
450
10 20 30 40 50 60 70
Output Power (Watts)
Ambient Temperature (Degrees C)
Power Rating at 100Vac
500LFM
350LFM
250LFM
Nat Conv
P-Q CURVE, DUCTED FLOW
0.0000
0.0025
0.0050
0.0075
0.0100
0 2.5 5 7.5 10 12.5 15 17.5 20 22.5
AIRFLOW-(CFM @ 0.075 lbs/cu ft air density)
Static Pressure (in. w.g.)
Air Flow
13mm [0.5in] all sides
*
64mm [2.5in]
Ambient Temperature
Measurement
Power Supply
Output Connector Input Connector
MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 5 of 6
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INRUSH CURRENT
Time: 100 mSec/Div, Ch1: 500 V/Div, Ch4: 20 A/Div, Vin: 264 VAC, Ipk = 15.1 A
AC applied at peak of sine wave
WIRING DIAGRAM FOR OUTPUT
100
10K0
2K49 10K0
10
1N
100
DC out return
+Remote Sense
-Remote Sense
+DC out
J3 pin 5
J2 pins 1-6
J2 pins 7-12
J3 pin 6
Dotted lines show optional remote sense connections.
Optional remote sense lines can be attached to a load that is a distance
away from the power supply to improve regulation at the load.
MVAC400
12V load
J3 pin 4
J3 pin 8
J3 pin 1
FET, BJT, wire
or switch (debounced)
to turn on +DC out
and +12V_fan
+5V logic circuitry
+5V_AUX
PS_ON
+5V_AUX_RTN
Fan or
other load
J3 pin 3
J3 pin 7
+12V_FAN_RTN
PWR_OK
>2mA
CTR~100
J3 pin 2
+5V_AUX
74LVC2G07
2
6
5
+12V_Fan
APPLICATION NOTE
Document Number Description Link
ACAN-42 MVAC Series External ORing FET Reference Circuit www.murata-ps.com/data/apnotes/acan-42.pdf
MECHANICAL DIMENSIONS – ALL MODELS
NOTES:
1. Protective bonding conductor from the end product protective earthing terminal must be tied to TB1. For optimum EMI performance, 4 mounting holes
must be tied to the end product protective earthing terminal.
2. This power supply requires mounting on standoffs minimum 6mm in height. If there is risk of chassis deformation or shorter standoff height is
required, an appropriate insulator must be used under the power supply with adequate extension beyond the outline of the power supply. In all cases,
the applicable safety standards must be applied to ensure proper creepage and clearance requirements are met.
3. The primary heatsink is considered a live primary circuit, and should not be touched. Also, the primary and secondary heatsinks must be separated
with reinforced insulation. It is recommended that the primary heatsink be kept at least 3.5mm from chassis and 7mm from secondary circuits. In all
cases, the applicable safety standards must be applied to ensure proper creepage and clearance requirements are met.
4. This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to:
http://www.murata-ps.com/requirements/
Dimensions: 3.0" x 5.0" x 1.4" (76.2mm x 127mm x 35.6mm)
INPUT/OUTPUT CONNECTOR AND SIGNAL SPECIFICATION AND MATING CONNECTORS – ALL MODELS
Connector PIN Description Mating Housing Crimp terminal/pins
Input Connector J1:
Molex 26-62-4030
1 AC Neutral Molex 0009930300 Molex 0008500105 (18-24 AWG)
Molex 0008500107 (22-26 AWG)
3 AC Line
Output Connector J2:
Molex 39-28-1123
1,2,3,4,5,6 +DC_OUT Molex 0039012125 Molex 0039000038
7,8,9,10,11,12 +DC_OUT_RTN
Output Connector J3:
Molex 90130-1108
1 +5V_AUX
Molex 0901420008 Molex 0901190109
2 PWR_OK
3 +12V_FAN_RTN
4 PS_ON
5 +Remote Sense
6 -Remote Sense
7 +12V_FAN
8 +5V_AUX_RTN
MVAC400 Series
400W High Density AC-DC Power Supply
MVAC400.A04 Page 6 of 6
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2013 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
30.0±0.25
1.181±.010
5.56±0.13
.219±.005
!
!
ALL DIMENSIONS ARE IN MM [IN]. TOLERANCE IS ±0.65MM [0.025IN]
J1
PIN 3
NOTE 3
PIN 2
REMOVED
HEATSINK
SECONDARY
PIN1
J2
PIN 1
J3
PIN 8
J3
PIN12
J2
J1
PIN 1
PRIMARY
HEATSINK
NOTE 3
MTG1
MTG2
TB1
MTG3
MTG4
4.500±.005
114.30±0.13
5.000±.010
127.00±0.25
63.50±0.13
2.500±.005
76.20±0.25
3.000±.010
.250±.005
6.35±0.13
6.50±0.13
.256±.005 MOUNTING HOLES
3.96±0.13
.156±.005
MAX SCREW HEAD
DIAMETER 7.40
612
511
410
39
28
17
J2
1-6 +DC_OUT
7-12 +DC_OUT_RTN
21
43
65
87
J3
1+5V_AUX
2PWR_OK
3 +12V_FAN_RTN
4PS_ON
5+REMOTE SENSE
6-REMOTE SENSE
7+12V_FAN
8+5V_AUX_RTN
