RESIDUAL RISK (PER ISO 14971 & IEC60601-1) FOR USER CONSIDERATION
Fault Condition
Complies
Residual Risk
Contact your Murata salesperson for details
Conditions
V1 (main output) latching
V3 (aux output) latching
V1, hiccup mode
V3, auto-recovery
Auto-recovery
Min.
110
5.5
110
110
Typ.
Max.
125
7.5
130
150
Units
%
V
%A max
PROTECTION CHARACTERISTICS
Parameter
Over Voltage Protection
4
Over Current Protection
4
Over Temperature Protection
Remote Sense Short Circuit Protection
Remote Sense Reverse Connection Protection
Complies
Complies
Complies
Min.
1500
4000
500
500
Typ.
Max.
Units
ISOLATION CHARACTERISTICS
Parameter
Isolation
Conditions
Primary to Chassis
Primary to Secondary (2xMOPP)
Secondary to Chassis
Output to Output
264Vac, 60Hz, 25°C
264Vac, 60Hz, 25°C
Vac
300
150
µA
µA
Earth Leakage Current (under single fault condition)
Earth Leakage Current (under normal conditions)
Model Number
CURRENT SHARING OPTION – MVAC400-xxAFD AND MVAC400-xxAFR
Description
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:
•
30mv per amp for the 12V output•
•
120mV per amp for the 24V output
•
500mV per amp for the 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, use the AFR model or if the AFD model is selected please contact Murata sales for external ORing FET board or external
ORing
FET reference circuit design (also see Applications Note ACAN-42).
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 com load must not exceed 12W, external ORing devices must be used.
MVAC400-12AFD
MVAC400-24AFD
MVAC400-48AFD
MVAC400-12AFR
www.murata-ps.com/support
MVAC400.B03 Page 2 of 3
MVAC400 Series
400W 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
E
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.
MI CONSIDE
SAFETY CONSIDERATIONS
IONS
STATUS AND CONTROL SIGNALS
Parameter Models
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.
Conditions
PS_ON
MVAC400-xxAF
This pin 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 of
MVAC400-xxAFD
the PS_ON signal, and comes up automatically when the input AC or input DC voltage is applied within their specified operating ranges.
MVAC400-xxAFR
MVAC400-xxAFT 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
MVAC400-xxAFJT voltage is applied within their specified operating ranges.
Pulling this pin low (sink current >2mA) to +5V_AUX_RTN will disable the main and fan outputs.
PWR_OK
All Models
Open collector logic goes high 50-200ms after the main output is within regulation; it goes low at least 6msecs before loss of regulation. Internal
10K pull up to +5V_Aux is provided. Applications using the PWR_OK signal should maintain a minimum load of 5W on the main or fan output.
6. Load regulation for droop version models (MVAC400-xxAFD and MVAC400-xxAFR) 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 difficult 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 a transient undershoot outside of the specification limits.
10.For MVAC400-xxAFR models only: Measured with 220µF capacitance across main output.
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 specified 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.
PART NUMBER STRUCTURE
MV
Murata Manufacturing Corp.
Form Factor Outline
A = 2″x4″; 3″x5″ or 4″x7″
A
x
yyy
-
zz
hhhh
Modification Code Options
A = Aux 5V Standby Voltage
F = Aux 12V Fan Output
D = Droop Current Share
J = JST AC Input Connector Variant
T = Terminal Output Connector
R = Terminal Output Connector, with Internal OR
ING
Solution
and Droop Current Share
Main Output Voltage
(12, 24, 27, 48)
Output Power (Watts)
(40, 65, 120, 160, 250, 400 or 750)
Outline Detail
B & D = 2″x4″
C = 3″x5″
F = 4″x7″
www.murata-ps.com/support
MVAC400.B03 Page 3 of 3
MVAC400 Series
400W 3" x 5" High Density AC-DC Power Supply Converter
400W 3" x 5" High Density AC-DC Power Supply Converter
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 configuration with controlled airflow at various input voltage conditions.
The air flow 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 influences local temperatures. The wind tunnel test setup was constructed to produce a flow with a slight back pressure to induce both flow
conditions by providing a small gap between the power supply and duct walls of 0.5" (13mm). The optimal and characterized airflow direction is from the
input connector to the output connector (see diagram below). The P-Q flow curve for this test setup is also shown below.
13mm [0.5in] all sides
P-Q CURVE, DUCTED FLOW
0.0100
Power Supply
Static Pressure (in. w.g.)
Airflow
0.0075
*
Ambient Temperature
Measurement
0.0050
0.0025
0.0000
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
Output Connector
Input Connector
64mm [2.5in]
AIRFLOW-(CFM @ 0.075 lbs/cu ft air density)
The natural convection data is obtained from a horizontally mounted power supply with un-obstructed flow 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 flows inherent in the elevated temperature test
据外媒报道，通用汽车公司已提交一项专利申请，该专利涉及一种使用反射式抬头显示器的非视距即将碰撞预警系统。该专利申请的专利号为US 2026/0014932 A1，于2024年7月10日提交至美国专利商标局（USPTO）。该专利申请于2026年1月15日公布，发明人为四位来自密歇根州的工程师，分别是Kai-Han Chang、Joseph F. Szczerba、Thomas A. Seder和G...[详细]
电子竞赛
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
