2024年10月27日发(作者：崔鸣玉)
ORDERING GUIDE
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
Main Output Fan Output Aux Output
(V1)(V2)(V3)
MVAC250-12F12V12V
MVAC250-24F24V12V
MVAC250-48F50V12V
MVAC250-12AF12V12V5V
170W250W @ 250LFM
MVAC250-12AFD*12V12V5V
MVAC250-24AFD*24V12V5V
MVAC250-48AFD*50V12V5V
#
MVAC250-24AFT24V12V5V
MVAC-COVEROptional cover kit assembly; see MVAC-COVER datasheet for details
* Refer to page 2 for current sharing model number MVAC250-xxAFD notes.
#
CCC Certifi cation is not available for these models.
Model NumberNatural Convection CoolingForced Air Cooling
FEATURES
IEC60601 Ed.3 medical (2 x MOPP Pri-Sec)
EN60950 ITE safety approved
250W compact high density
3" x 5" standard footprint
High effi ciency up to 94%
Remote sense
Remote On/Off, Power OK (MVAC250-xxAFx)
Universal AC input with active PFC
Less than 1U high – 1.4"
Convection cooled operation up to 170W
Isolated 12V@1A fan output
Isolated 5V@2A standby/auxiliary output with
models MVAC250-xxAFx
RoHS compliant
Active inrush protection
Current sharing option
INPUT CHARACTERISTICS
Parameter
Input Voltage Operating Range
Input Frequency
Turn-on Input Voltage
Turn-off Input Voltage
Input Current
No Load Input Power (MVAC250-xxAFD)
7
Inrush Current
Power Factor
Conditions
Single phase
DC
Input rising
Input falling
90Vac input, full load all outputs
(PS_ON = OFF, 5V_Aux = 0A)
At 264Vac, at 25°C cold start
At 230Vac, full load
Min.
90
127
47
80
70
1.5
15
0.96
Typ.
115/230
50/60
Max.
264
300
63
90
80
3.4
2.0
Units
Vac
Vdc
Hz
Vac
A
W
Apk
OUTPUT CHARACTERISTICS
Model Number
MVAC250-12F
MVAC250-24F
MVAC250-24AFT
MVAC250-48F
MVAC250-12AF
MVAC250-12AFD
MVAC250-24AFD
MVAC250-48AFD
Main Output
Voltage (V1)
12V
24V
50V
12V
6
6
6
Load Current
0.4 to 20.8A
0.2 to 10.4A
0.1 to 5.0A
0 to 20.8A
0 to 20.8A
0 to 10.4A
0 to 5.0A
Maximum Load
Capacitance
0 to 1500μF
0 to 300μF
0 to 82μF
0 to 1500uF
0 to 1500μF
0 to 300μF
0 to 68μF
Line, Load, Cross
Regulation
± 1%
± 1%
± 1%
± 1%
± 1.5%
6
± 1.5%
6
+3.0% / –1.5%
6
.
± 5
500
3
50
0.02
1
500
Typical Effi ciency
@230Vac
93%
93%
94%
93%
93%
93%
94%
Units
%
μsec
sec
msec
%/°C
%
mV
DESCRIPTION
The MVAC250 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 MVAC250 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.
/en/3d/
/en/3d/
/en/3d/
/en/3d/
/en/3d/
/en/3d/
Available now at
/en/3d/
Main Output Characteristics (all models)
ParameterConditions
9
Transient Response50% load step, 1A/μsec slew rate
Settling Time to 1% of Nominal
Turn On DelayAfter application of input power
Output Voltage RiseMonotonic
5
Output Holdup120Vac/60Hz, full load
Temperature Coeffi cient
Ripple Voltage & Noise
1
Compensates for up to 0.5V of lead drop with
Remote Senseremote sense connected. Protected against
short circuit and reverse connection.
20
Auxiliary Output
Fan (V2) all models
Aux (V3) – MVAC250-xxAFx
Aux Output
Load Current
Voltage
8
12V
0 to 1A
0 to 2A
5V
Load Capacitance
0 to 220μF
0 to 220μF
Line, Load, Cross Ripple Voltage &
Regulation
3
Noise
1
± 10%2%
± 5%1%
CB
Test Certifi cate
and Test Report
For full details go to
/rohs
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
ENVIRONMENTAL CHARACTERISTICS
Parameter
Storage Temperature Range
Operating Temperature Range
Operating Humidity
Operating Altitude
MTBF
Shock
Operational Vibration
Safety – Medical Standards
2 x MOPP (Primary-Secondary)
Conditions
See power rating curves
Start up
Non-condensing
.
-40
-10
-20
10
-200
474K
Complies
Complies
Complies to levels of IEC721-3-2
Max.
85
70
95
5000
Units
°C
%
m
Hours
Safety – ITE Standards
Warranty
Outside Dimensions
Weight
Fault Condition
Complies
Telcordia SR-332 M1C3 @25°C
Operating, MIL-HBK-810E
Non-operating, MIL-HBK-810E
IEC-68-2-27 standard
IEC60601-1 (Ed. 3) – CB Cert & Report
ANSI/AAMI ES60601-1 (2005+ C1:2005+A2:10)
CAN/CSA 22.2 No. 60601-1 (2008) 3rd Edition
EN60601-1:2006+CORR:2010
UL60950-1:, 2nd Edition, 2011-12-19
CSA22.2 No..60950-1-07, 2nd Edition, 2001-12.
EN60950-1:2006+A11:2009/A1/2010/A12:2011
IEC 60950 (ed.2), IEC60950 (ed.2);am1
CE Marking per LVD
2 years
3.0" x 5.0" x 1.4" (76.2mm x 127mm x 35.6mm)
MVAC250-xxF: 0.73 lbs (332.9g); MVAC250-xxAFD: 0.76 lbs (344.7g); MVAC250-xxAFT 0.78 lbs (352.7g)
Residual Risk
Contact your Murata salesperson for details
Conditions
V1 (main output) latching
V3 (aux output: MVAC250-xxAFx) latching
V1, hiccup mode
Auto-recovery
Min.
110
5.5
110
.
125
7.5
130
RESIDUAL RISK (PER ISO 14971 & IEC60601-1) FOR USER CONSIDERATION
PROTECTION CHARACTERISTICS
Parameter
Over Voltage Protection
4
Over Current Protection
4
Over Temperature Protection
Remote Sense Short Circuit Protection
Remote Sense Reverse Connection Protection
Units
%
V
%Amax
Complies
Complies
Complies
ISOLATION CHARACTERISTICS
Parameter
Isolation
.
Primary to Chassis1500
Primary to Secondary (2xMOPP)4000
Secondary to Chassis500
Output to Output500
MVAC250-xxAFD 300
MVAC250-xxAF; -xxAFT300
MVAC250-xxF350
MVAC250-xxAFD150
MVAC250-xxAF; -xxAFT150
MVAC250-xxF250
Vac
Earth Leakage Current (under single fault condition):
264Vac, 60Hz, 25°C
Earth Leakage Current (under normal conditions):
264Vac, 60Hz, 25°C
μA
CURRENT SHARING OPTION – MVAC250-xxAFD ONLY
Model NumberDescription
Main Output: Current share is achieved using the droop method. Nominal output voltage is achieved at 50% load and output voltage increases/
drops at a rate of:
• 48mv per amp for 12V output
• 192mV per amp for 24V output
• 800mV per amp for 50V output.
Startup of parallel power supplies is not internally synchronized. If more than 250W 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.
MVAC250-12AFD
MVAC250-24AFD
MVAC250-48AFD
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
EMISSIONS AND IMMUNITY
Characteristic
Input Current Harmonics
Voltage Fluctuation and Flicker
Conducted Emissions
ESD Immunity
Radiated Field Immunity
Electrical Fast Transient Immunity
Surge Immunity
Radiated Field Conducted Immunity
Magnetic Field Immunity
Voltage dips, interruptions
Standard
IEC/EN 61000-3-2
IEC/EN 61000-3-3
EN 55022
FCC Part 15
IEC/EN 61000-4-2
IEC/EN 61000-4-3
IEC/EN 61000-4-4
IEC/EN 61000-4-5
IEC/EN 61000-4-6
IEC/EN 61000-4-8
IEC/EN 61000-4-11
Compliance
Class A
Complies
Class B
Class B
Level 4, Criterion 2
Level 3, Criterion A
Level 4, Criterion A
Level 3, Criterion A
Level 3, 10V/m, Criterion A
Level 3, Criterion A
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. Class B radiated emissions are achievable with a metal enclosure. Radiated emission results vary with system enclosure and cable routing paths.
SAFETY CONSIDERATIONS
1. This power supply is a component level power supply intended for use in Class I or Class II applications. Secondary ground traces need to be suitably isolated
from primary ground traces when used in Class II applications.
2. When the power supply is used in Class II equipment, all ground traces and components connected to the primary side are considered primary for spacing and
insulation considerations.
STATUS AND CONTROL SIGNALS – MVAC250-xxAFD ONLY
Parameter
PS_ON
ModelsConditions
All models except This signal must be pulled low (sink current >2mA) to +5V_AUX_RTN to turn on the main and Fan (V2) output. The +5V_AUX output is independent
as noted the PS_ON signal and comes up automatically when the input AC or input DC voltage is applied within their specifi ed operating ranges.
This pin is pulled high internally and so all three outputs (main, Fan output and +5V_AUX) come up automatically when the input AC or input DC voltage
MVAC250-xxAFT
is applied within their specifi ed operating ranges. Pulling this pin low (sink current >2mA) to +5V_AUX_RTN will disable the main and fan outputs.
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
All models
up to +5V_AUX is provided. Applications using PWR_OK signal should maintain a minimum load of 5W on the main or fan output.
PWR_OK
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 permanent 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. See current sharing option 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.
9. Load steps beginning from combined loads on the main and fan outputs of less than 5W may
result in transient undershoots outside of the spec limits.
PART NUMBER STRUCTURE
MV
Ax
yyy
-
zzhhh
Murata Manufacturing Corp.
Modifi cation Code Options
A = Aux 5V Standby Voltage
F = Aux 12V Fan Output
D = Droop Current Share
T = Terminal Output Connector
R = Terminal Output Connector with Internal Or-ing Solution and Droop Current Share
Main Output Voltage (V)
(12, 24, 28, or 50)
Output Power (W)
(40, 65, 120, 160, 250, 400, or 750)
Form Factor Outline
A = 2x4", 3x5", or 4x7"
Outline Detail
B & D = 2x4"
C = 3x5"
F = 4x7"
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
PERFORMANCE DATA
MVAC250-12F Efficiency
95
93
91
MVAC250-24F Efficiency
95
93
E
f
fi
c
i
e
n
c
y
%
89
87
85
83
81
115 Vin
230 Vin
E
f
fi
c
i
e
n
c
y
%
90 Vin
91
89
87
85
83
81
90 Vin
115 Vin
230 Vin
Load %
MVAC250-48F Efficiency
95
93
91
Load %
Inrush Current
E
f
fi
c
i
e
n
c
y
%
90 Vin
115 Vin
230 Vin
89
87
85
83
81
Load %
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
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
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.
13mm [0.5in] all sides
P-Q CURVE, DUCTED FLOW
Power Supply
Air Flow
S
t
a
t
i
c
P
r
e
s
s
u
r
e
(
i
n
.
w
.
g
.
)
0.0100
0.0075
*
Ambient Temperature
Measurement
Output Connector
Input Connector
64mm [2.5in]
0.0050
0.0025
0.0000
02.557.51012.51517.52022.5
AIRFLOW-(************/cuftairdensity)
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.
Power RaƟng at 230Vac
275
250
225
200
175
150
125
100
75
50
10
Ambient Temperature (Degrees C)
275
250
225
200
175
150
125
100
75
50
10
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
Power RaƟng at 120Vac
Nat Conv
250LFM
Nat Conv
250LFM
2
Ambient Temperature (Degrees C)
Power RaƟng at 100Vac
275
250
225
200
175
150
125
100
75
50
10
Ambient Temperature (Degrees C)
275
250
225
200
175
150
125
100
75
50
1020
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
Power RaƟng at 90Vac
Nat Conv
250LFM
Nat Conv
250LFM
3040506070
Ambient Temperature (Degrees C)
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
WIRING DIAGRAM FOR OUTPUT
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.
+Remote Sense
+Remote Sense
MVAC250-xxAFx
J3 pin 5
J2 pins 1-6
+DC out
MVAC250-xxF
Main Output Load
J3 pin 5
J2 pins 1-6
+DC out
Main Output Load
J2 pins 7-12
J3 pin 6
DC out return
-Remote Sense
J2 pins 7-12
J3 pin 6
2K4910K0
J3 pin 1
DC out return
-Remote Sense
+5V_AUX
10
CTR~100
1N0
100
J3 pin 4
+5V_AUX
PS_ON
>2mA
J3 pin 2
PWR_OK
+5V logic circuitry
10K0
5
2
6
100
74LVC2G07
J3 pin 8
+5V_AUX_RTN
FET, BJT, wire
or switch (debounced )
to turn on +DC out
and +12V_fan
J3 pin 7+12V_Fan
Fan or
other load
J3 pin 7+12V_Fan
Fan or
other load
J3 pin 3+12V_FAN_RTN
J3 pin 3+12V_FAN_RTN
APPLICATION NOTE
Document Number
ACAN-42 MVAC Series
Description
External ORing FET Reference Circuit
Link
/data/apnotes/
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
MECHANICAL DIMENSIONS – MVAC250-xxF ONLY
2024年10月27日发(作者：崔鸣玉)
ORDERING GUIDE
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
Main Output Fan Output Aux Output
(V1)(V2)(V3)
MVAC250-12F12V12V
MVAC250-24F24V12V
MVAC250-48F50V12V
MVAC250-12AF12V12V5V
170W250W @ 250LFM
MVAC250-12AFD*12V12V5V
MVAC250-24AFD*24V12V5V
MVAC250-48AFD*50V12V5V
#
MVAC250-24AFT24V12V5V
MVAC-COVEROptional cover kit assembly; see MVAC-COVER datasheet for details
* Refer to page 2 for current sharing model number MVAC250-xxAFD notes.
#
CCC Certifi cation is not available for these models.
Model NumberNatural Convection CoolingForced Air Cooling
FEATURES
IEC60601 Ed.3 medical (2 x MOPP Pri-Sec)
EN60950 ITE safety approved
250W compact high density
3" x 5" standard footprint
High effi ciency up to 94%
Remote sense
Remote On/Off, Power OK (MVAC250-xxAFx)
Universal AC input with active PFC
Less than 1U high – 1.4"
Convection cooled operation up to 170W
Isolated 12V@1A fan output
Isolated 5V@2A standby/auxiliary output with
models MVAC250-xxAFx
RoHS compliant
Active inrush protection
Current sharing option
INPUT CHARACTERISTICS
Parameter
Input Voltage Operating Range
Input Frequency
Turn-on Input Voltage
Turn-off Input Voltage
Input Current
No Load Input Power (MVAC250-xxAFD)
7
Inrush Current
Power Factor
Conditions
Single phase
DC
Input rising
Input falling
90Vac input, full load all outputs
(PS_ON = OFF, 5V_Aux = 0A)
At 264Vac, at 25°C cold start
At 230Vac, full load
Min.
90
127
47
80
70
1.5
15
0.96
Typ.
115/230
50/60
Max.
264
300
63
90
80
3.4
2.0
Units
Vac
Vdc
Hz
Vac
A
W
Apk
OUTPUT CHARACTERISTICS
Model Number
MVAC250-12F
MVAC250-24F
MVAC250-24AFT
MVAC250-48F
MVAC250-12AF
MVAC250-12AFD
MVAC250-24AFD
MVAC250-48AFD
Main Output
Voltage (V1)
12V
24V
50V
12V
6
6
6
Load Current
0.4 to 20.8A
0.2 to 10.4A
0.1 to 5.0A
0 to 20.8A
0 to 20.8A
0 to 10.4A
0 to 5.0A
Maximum Load
Capacitance
0 to 1500μF
0 to 300μF
0 to 82μF
0 to 1500uF
0 to 1500μF
0 to 300μF
0 to 68μF
Line, Load, Cross
Regulation
± 1%
± 1%
± 1%
± 1%
± 1.5%
6
± 1.5%
6
+3.0% / –1.5%
6
.
± 5
500
3
50
0.02
1
500
Typical Effi ciency
@230Vac
93%
93%
94%
93%
93%
93%
94%
Units
%
μsec
sec
msec
%/°C
%
mV
DESCRIPTION
The MVAC250 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 MVAC250 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.
/en/3d/
/en/3d/
/en/3d/
/en/3d/
/en/3d/
/en/3d/
Available now at
/en/3d/
Main Output Characteristics (all models)
ParameterConditions
9
Transient Response50% load step, 1A/μsec slew rate
Settling Time to 1% of Nominal
Turn On DelayAfter application of input power
Output Voltage RiseMonotonic
5
Output Holdup120Vac/60Hz, full load
Temperature Coeffi cient
Ripple Voltage & Noise
1
Compensates for up to 0.5V of lead drop with
Remote Senseremote sense connected. Protected against
short circuit and reverse connection.
20
Auxiliary Output
Fan (V2) all models
Aux (V3) – MVAC250-xxAFx
Aux Output
Load Current
Voltage
8
12V
0 to 1A
0 to 2A
5V
Load Capacitance
0 to 220μF
0 to 220μF
Line, Load, Cross Ripple Voltage &
Regulation
3
Noise
1
± 10%2%
± 5%1%
CB
Test Certifi cate
and Test Report
For full details go to
/rohs
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
ENVIRONMENTAL CHARACTERISTICS
Parameter
Storage Temperature Range
Operating Temperature Range
Operating Humidity
Operating Altitude
MTBF
Shock
Operational Vibration
Safety – Medical Standards
2 x MOPP (Primary-Secondary)
Conditions
See power rating curves
Start up
Non-condensing
.
-40
-10
-20
10
-200
474K
Complies
Complies
Complies to levels of IEC721-3-2
Max.
85
70
95
5000
Units
°C
%
m
Hours
Safety – ITE Standards
Warranty
Outside Dimensions
Weight
Fault Condition
Complies
Telcordia SR-332 M1C3 @25°C
Operating, MIL-HBK-810E
Non-operating, MIL-HBK-810E
IEC-68-2-27 standard
IEC60601-1 (Ed. 3) – CB Cert & Report
ANSI/AAMI ES60601-1 (2005+ C1:2005+A2:10)
CAN/CSA 22.2 No. 60601-1 (2008) 3rd Edition
EN60601-1:2006+CORR:2010
UL60950-1:, 2nd Edition, 2011-12-19
CSA22.2 No..60950-1-07, 2nd Edition, 2001-12.
EN60950-1:2006+A11:2009/A1/2010/A12:2011
IEC 60950 (ed.2), IEC60950 (ed.2);am1
CE Marking per LVD
2 years
3.0" x 5.0" x 1.4" (76.2mm x 127mm x 35.6mm)
MVAC250-xxF: 0.73 lbs (332.9g); MVAC250-xxAFD: 0.76 lbs (344.7g); MVAC250-xxAFT 0.78 lbs (352.7g)
Residual Risk
Contact your Murata salesperson for details
Conditions
V1 (main output) latching
V3 (aux output: MVAC250-xxAFx) latching
V1, hiccup mode
Auto-recovery
Min.
110
5.5
110
.
125
7.5
130
RESIDUAL RISK (PER ISO 14971 & IEC60601-1) FOR USER CONSIDERATION
PROTECTION CHARACTERISTICS
Parameter
Over Voltage Protection
4
Over Current Protection
4
Over Temperature Protection
Remote Sense Short Circuit Protection
Remote Sense Reverse Connection Protection
Units
%
V
%Amax
Complies
Complies
Complies
ISOLATION CHARACTERISTICS
Parameter
Isolation
.
Primary to Chassis1500
Primary to Secondary (2xMOPP)4000
Secondary to Chassis500
Output to Output500
MVAC250-xxAFD 300
MVAC250-xxAF; -xxAFT300
MVAC250-xxF350
MVAC250-xxAFD150
MVAC250-xxAF; -xxAFT150
MVAC250-xxF250
Vac
Earth Leakage Current (under single fault condition):
264Vac, 60Hz, 25°C
Earth Leakage Current (under normal conditions):
264Vac, 60Hz, 25°C
μA
CURRENT SHARING OPTION – MVAC250-xxAFD ONLY
Model NumberDescription
Main Output: Current share is achieved using the droop method. Nominal output voltage is achieved at 50% load and output voltage increases/
drops at a rate of:
• 48mv per amp for 12V output
• 192mV per amp for 24V output
• 800mV per amp for 50V output.
Startup of parallel power supplies is not internally synchronized. If more than 250W 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.
MVAC250-12AFD
MVAC250-24AFD
MVAC250-48AFD
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MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
EMISSIONS AND IMMUNITY
Characteristic
Input Current Harmonics
Voltage Fluctuation and Flicker
Conducted Emissions
ESD Immunity
Radiated Field Immunity
Electrical Fast Transient Immunity
Surge Immunity
Radiated Field Conducted Immunity
Magnetic Field Immunity
Voltage dips, interruptions
Standard
IEC/EN 61000-3-2
IEC/EN 61000-3-3
EN 55022
FCC Part 15
IEC/EN 61000-4-2
IEC/EN 61000-4-3
IEC/EN 61000-4-4
IEC/EN 61000-4-5
IEC/EN 61000-4-6
IEC/EN 61000-4-8
IEC/EN 61000-4-11
Compliance
Class A
Complies
Class B
Class B
Level 4, Criterion 2
Level 3, Criterion A
Level 4, Criterion A
Level 3, Criterion A
Level 3, 10V/m, Criterion A
Level 3, Criterion A
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. Class B radiated emissions are achievable with a metal enclosure. Radiated emission results vary with system enclosure and cable routing paths.
SAFETY CONSIDERATIONS
1. This power supply is a component level power supply intended for use in Class I or Class II applications. Secondary ground traces need to be suitably isolated
from primary ground traces when used in Class II applications.
2. When the power supply is used in Class II equipment, all ground traces and components connected to the primary side are considered primary for spacing and
insulation considerations.
STATUS AND CONTROL SIGNALS – MVAC250-xxAFD ONLY
Parameter
PS_ON
ModelsConditions
All models except This signal must be pulled low (sink current >2mA) to +5V_AUX_RTN to turn on the main and Fan (V2) output. The +5V_AUX output is independent
as noted the PS_ON signal and comes up automatically when the input AC or input DC voltage is applied within their specifi ed operating ranges.
This pin is pulled high internally and so all three outputs (main, Fan output and +5V_AUX) come up automatically when the input AC or input DC voltage
MVAC250-xxAFT
is applied within their specifi ed operating ranges. Pulling this pin low (sink current >2mA) to +5V_AUX_RTN will disable the main and fan outputs.
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
All models
up to +5V_AUX is provided. Applications using PWR_OK signal should maintain a minimum load of 5W on the main or fan output.
PWR_OK
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 permanent 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. See current sharing option 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.
9. Load steps beginning from combined loads on the main and fan outputs of less than 5W may
result in transient undershoots outside of the spec limits.
PART NUMBER STRUCTURE
MV
Ax
yyy
-
zzhhh
Murata Manufacturing Corp.
Modifi cation Code Options
A = Aux 5V Standby Voltage
F = Aux 12V Fan Output
D = Droop Current Share
T = Terminal Output Connector
R = Terminal Output Connector with Internal Or-ing Solution and Droop Current Share
Main Output Voltage (V)
(12, 24, 28, or 50)
Output Power (W)
(40, 65, 120, 160, 250, 400, or 750)
Form Factor Outline
A = 2x4", 3x5", or 4x7"
Outline Detail
B & D = 2x4"
C = 3x5"
F = 4x7"
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
PERFORMANCE DATA
MVAC250-12F Efficiency
95
93
91
MVAC250-24F Efficiency
95
93
E
f
fi
c
i
e
n
c
y
%
89
87
85
83
81
115 Vin
230 Vin
E
f
fi
c
i
e
n
c
y
%
90 Vin
91
89
87
85
83
81
90 Vin
115 Vin
230 Vin
Load %
MVAC250-48F Efficiency
95
93
91
Load %
Inrush Current
E
f
fi
c
i
e
n
c
y
%
90 Vin
115 Vin
230 Vin
89
87
85
83
81
Load %
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
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
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.
13mm [0.5in] all sides
P-Q CURVE, DUCTED FLOW
Power Supply
Air Flow
S
t
a
t
i
c
P
r
e
s
s
u
r
e
(
i
n
.
w
.
g
.
)
0.0100
0.0075
*
Ambient Temperature
Measurement
Output Connector
Input Connector
64mm [2.5in]
0.0050
0.0025
0.0000
02.557.51012.51517.52022.5
AIRFLOW-(************/cuftairdensity)
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.
Power RaƟng at 230Vac
275
250
225
200
175
150
125
100
75
50
10
Ambient Temperature (Degrees C)
275
250
225
200
175
150
125
100
75
50
10
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
Power RaƟng at 120Vac
Nat Conv
250LFM
Nat Conv
250LFM
2
Ambient Temperature (Degrees C)
Power RaƟng at 100Vac
275
250
225
200
175
150
125
100
75
50
10
Ambient Temperature (Degrees C)
275
250
225
200
175
150
125
100
75
50
1020
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
O
u
t
p
u
t
P
o
w
e
r
(
W
a
Ʃ
s
)
Power RaƟng at 90Vac
Nat Conv
250LFM
Nat Conv
250LFM
3040506070
Ambient Temperature (Degrees C)
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
WIRING DIAGRAM FOR OUTPUT
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.
+Remote Sense
+Remote Sense
MVAC250-xxAFx
J3 pin 5
J2 pins 1-6
+DC out
MVAC250-xxF
Main Output Load
J3 pin 5
J2 pins 1-6
+DC out
Main Output Load
J2 pins 7-12
J3 pin 6
DC out return
-Remote Sense
J2 pins 7-12
J3 pin 6
2K4910K0
J3 pin 1
DC out return
-Remote Sense
+5V_AUX
10
CTR~100
1N0
100
J3 pin 4
+5V_AUX
PS_ON
>2mA
J3 pin 2
PWR_OK
+5V logic circuitry
10K0
5
2
6
100
74LVC2G07
J3 pin 8
+5V_AUX_RTN
FET, BJT, wire
or switch (debounced )
to turn on +DC out
and +12V_fan
J3 pin 7+12V_Fan
Fan or
other load
J3 pin 7+12V_Fan
Fan or
other load
J3 pin 3+12V_FAN_RTN
J3 pin 3+12V_FAN_RTN
APPLICATION NOTE
Document Number
ACAN-42 MVAC Series
Description
External ORing FET Reference Circuit
Link
/data/apnotes/
/support
MVAC250 Series
250W 3" x 5" High Density AC-DC Power Supply Converter
MECHANICAL DIMENSIONS – MVAC250-xxF ONLY