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CEF400-112C
www.murata-ps.com
400 Watt Open Frame Single Output
AC/DC Switching Power Supply
PRODUCT SPECIFICATIONS
INPUT CHARACTERISTICS
Parameter
Conditions
Input Voltage Operating Range (AC)
Input Frequency
Turn-on Input Voltage
Turn-off Input Voltage
Maximum Input Current
Inrush Current
Power Factor
Leakage Current
Min.
Typ.
85
47
76
63
1.75
Ramp up
Ramp down
IEC EN61000-3-2 compliant
264 VAC input
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Max.
Units
264
63
85
78
6.5
20
VAC
Hz
Arms
Apk
0.90
mA
VAC
OUTPUT CHARACTERISTICS
Output
Voltage
FEATURES

400W continuous output power

Low profile (1U)

IEC EN61000-3-2 compliance

Remote sense compensation

AC Power Fail signal

DC Power Good signal
12V
5Vsb
Re
Parameter
Conditions
Min.
Typ.
Max.
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise1
Rated Output Current
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise1
Rated Output Current
17A load
12.08
11.75
12.125
12.16
12.45
175
20MHz Bandwidth
33.3
4.85
4.85
5
5.15
5.15
50
20MHz Bandwidth
1.3
Units
VDC
mV p-p
A
VDC
mV p-p
A

Remote Inhibit control

Droop current share
GENERAL
Parameter
Conditions

Built-in OR-ing FET
 I2C interface
Remote Sense
Sum of +ve & -ve drops
500
mV
Efficiency
Full load, high line
83
%
2
s

5V Standby

Integrated cooling fan (variable speed)
Typ.
Turn on Delay
Transient Response

Over-voltage protection

Over-current protection

Thermal overload protection
Min.
12V Ramp 1A/μs 33% step
±375
5Vsb Ramp 1A/μs 33% step
±40
200-720W load (2 in parallel)
Current Sharing Accuracy
DESCRIPTION
The CEF400-112C is a 400W active powerfactor-corrected (PFC) front-end power supply
for distributed power architecture (DPA) systems requiring high power density in a 1U low
profile package. The built-in OR-ing FET allows
the power supply to operate in active current
sharing mode for redundant (N+1) operation.
Additional features include I2C interface, builtin fan and a 5V standby auxiliary output. The
CEF400-112 provides reliable 12V bulk power
for Information Technology Equipment and
Industrial Applications.
40/60
50-96W load (2 in parallel)
20/80
Temperature Coefficient
1
%
20
500
1500
ms
Vrms
0.02
% / °C
Ripple and noise are measured with 0.1 μF of ceramic capacitance and 10 μF of tantalum capacitance on each of the power
supply outputs. The output noise requirements apply over a 0 Hz to 20 MHz bandwidth. A short coaxial cable with 50Ω scope
termination is used.
PROTECTION CHARACTERISTICS
Parameter
Output Voltage
Conditions
Over Voltage
Latching
Over Current
Auto-restart
12V
Short Circuit
Over Voltage
Over Current
5Vsb
Over-temperature
Input Undervoltage
Unit
Min.
Typ.
Max.
Units
14.065
14.5
14.935
V
36
38
42
A
The 12V output shall current limit and shutdown during a shorted
output condition, and shall automatically restart after the short is
removed.
Latching
Auto-restart
For full details go to
www.murata-ps.com/rohs
mV
10/90
400W, 120VAC line
Output to Chassis-Basic
Input to Chassis-Basic
Full load and 100VAC input
Isolation
Units
45/55
96-200W load (2 in parallel)
24-50W load (2 in parallel)
Hold-up Time, to 10.8V
Max.
Auto-restart
5.6
1.4
2.1
6
V
2.65
A
Unit shall self-protect against excessive internal
temperatures and automatically recover.
No damage will be sustained by operation at voltages below the specified input
operating voltage range.
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MPS_CEF400-112C.B21 Page 1 of 3
CEF400-112C
400 Watt Open Frame Single Output
AC/DC Switching Power Supply
MONITORING AND CONTROL SIGNALS
EMISSIONS AND IMMUNITY
TTL logic signal goes high to denote loss of AC input. Power
supply will provide a minimum of 5ms from loss of AC input
before this signal goes high. Additionally a minimum of 3ms
of holdup will be provided between the signal going high and
the output going out of regulation. The signal will not go high
when loss of AC input is less than 5ms in duration.
AC Fail
DC OK
TTL logic goes high after the output is in regulation. It goes
low when there is loss of regulation.
Remote On/Off
TTL logic input signal disables the output when held low, and
enables the output when held high.
Remote Sense
Compensates for 0.5 V lead drop min. Will operate without
remote sense connected. Unit is protected against reverse
connection of the remote sense lines.
EMI
EN55022 Class B conducted
Electromagnetic Susceptibility
ESD
Electromagnetic Field
Electrical Fast Transients/Burst
Surge
RF Conducted Immunity
Magnetic Immunity
Voltage Dips, Interruptions
IEC/EN 61000-4-2, Level 3
IEC/EN 61000-4-3, Level 3
IEC/EN 61000-4-4, Level 3
IEC/EN 61000-4-5, Level 3
IEC/EN 61000-4-6, Level 3
IEC/EN 61000-4-8, Level 3
IEC/EN 61000-4-11, Level 3
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ENVIRONMENTAL CHARACTERISTICS
SAFETY
UL
cUL
CB
Material Flammability
UL60950-1 (E151252)
CSA C22.2 No. 60950-1 (E151252)
US/13399/UL per IEC60950-1 (2001) 1st Ed.
UL 94V-0
Parameter
Conditions
Min.
Storage Temperature Range
Operating Temperature Range
Operating Humidity
Storage Humidity
Non-condensing
w/o derating
Non-condensing
–40
0
10
5
Typ.
Max. Units
+ 85
50
90
95
°C
%
Re
MECHANICAL
Dimensions
RELIABILITY
Calculated2 per MIL-HDBK-217N2, GB, 25°C, Quality Level I
MTBF
Calculated2 per Telcordia SR-332, Issue 1, Method 1,
Case 3, GFC, Ground fixed, Controlled, Quality Level I
212khrs
293khrs
4.0" × 7.0" × 1.59" (101.6mm × 177.8mm × 40.39mm)
Weight
2.0 lbs (0.91 kgs)
Vibration
Designed to meet IEC 68-2-6 to the levels from IEC 721-3-2
Shock
Designed to meet IEC 68-2-27
Drop
Designed to meet IEC 68-2-31
Tip over
Designed to meet IEC 68-2-31
I2C INTERFACE
Software Remote On/Off over I2C
Writing 0x7F at address 40 disables the output of the unit
Writing 0xFF at address 40 enables the output of the unit
Parametric Reporting Read Byte
Reading at address 40 over I2C lines, give the ‘Parametric Reporting Read Byte’, which is detailed below
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Output Enable
NOT USED
(normal 1)
NOT USED
(normal 1)
NOT USED
(normal 1)
Over Temperature
Fan Fault
Output OK
Input Ok
1
Unit Enabled
0
Unit Disabled
NOT USED
1
BIT 5
NOT USED
BIT 4
NOT USED
BIT 7
Output Enable
BIT 6
BIT 3
Over Temperature
Set to 1
BIT 2
Fan Fault
1
Set to 1
BIT 1
Output OK
1
Set to 1
BIT 0
Input OK
1
Over temperature exists
0
No over temperature
1
Fan locked rotor fault exists
0
Fan OK
1
Output fault exists
0
Output OK
1
Input fault exists
0
Input OK
Notes
Specifications subject to change without notice.
Specifications are at factory settings.
Warranty: 1 year.
2
Calculated figures exclude the integral fan.
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MPS_CEF400-112C.B21 Page 2 of 3
CEF400-112C
400 Watt Open Frame Single Output
AC/DC Switching Power Supply
MECHANICAL DIMENSIONS
A
B
B
7.00
4.700
B
C
A
1.15
A B
2.500
4.00
B
A B
A
M3 THDS
(6 'A' PLS)
1.59
.75
.75
BOTTOM
2X 10-32-UNF-2A
OUTPUT SCREWS
APPLY LABEL (ITEM 580)
ON COVER, ORIENT AS SHOWN
TP1
J7
OUTPUT END
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
Function
SCL
SDA
5V I2C
A0
A1
A2
N/C
N/C
GND
GND
GND
GND
J5 Aux/Control Connector
B
A
5.850
J1 Input Connector
Function
Line
No Pin
Neutral
No Pin
Ground
J7 I2C Control Connector
TYPICAL SIDE VIEW
Re
Pin #
1
2
3
4
5
COVER
1.0mm
STEEL
AIRFLOW
J1
PIN #7
PIN #6
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INPUT END
PIN #1
PIN #1
6-32 THDS
(8 'B' PLS)
COM +V
5.500
.25
6.250
B
.85
Pin #
1
2
3
4
5
6
7
8
9
10
PIN #5
Function
NC
-Sense
+Sense
5VSB (Standby)
5VSB Return
+12V
Common
Remote On/Off
DC OK
AC Fail
J5
PIN #6
PIN #1
J1 (Molex #26-62-4051, 5 Position, 3-Pin, .156" Straight Header)
Mating Plug Housing
Molex #09-50-8051
Mating Crimp Terminal
Molex #08-52-0113
J5 (Molex #90130-3210, 10 Position C-Grid-III Receptacle, .100")
Mating Plug Housing
Molex #90142-0012
Mating Crimp Terminal
Molex #90119-0121
J7 (Molex #87833-1231, 12 Position 2mm Milli-Grid)
Mating Plug Housing
Molex #51110-1260
Mating Crimp Terminal
Molex #50394-8100
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, 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/
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. Specifications are subject to change without
notice.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
MPS_CEF400-112C.B21 Page 3 of 3