CEF400-112C
400 Watt Open Frame Single Output
AC/DC Switching Power Supply
PRODUCT SPECIFICATIONS
INPUT CHARACTERISTICS
Parameter
Input Voltage Operating Range (AC)
Input Frequency
Turn-on Input Voltage
Turn-off Input Voltage
Maximum Input Current
Inrush Current
Power Factor
Leakage Current
OUTPUT CHARACTERISTICS
Conditions
Min.
85
47
76
63
1.75
Typ.
Max.
264
63
85
78
6.5
20
0.90
Units
V
ac
Hz
V
ac
Arms
Apk
mA
Ramp up
Ramp down
IEC EN61000-3-2 compliant
264 V
ac
input
FEATURES
n
400W continuous output power
n
EN61000-3-2 compliance
IEC
n
Remote sense compensation
n
Power Fail signal
AC
n
Power Good signal
DC
n
Remote Inhibit control
n
Droop current share
n
I
2
C interface
n
Standby
5V
n
profile (1U)
Low
n
Integrated cooling fan
n
Over-voltage protection
n
Over-current protection
n
Thermal overload protection
n
Built-in OR-ing FET
Output
Voltage
12V
Parameter
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise
➀
Rated Output Current
Voltage Set Point Accuracy
Line and Load Regulation
Ripple Voltage & Noise
➀
Rated Output Current
Conditions
17A load
20MHz Bandwidth
Min.
12.08
11.75
33.3
4.85
4.85
Typ.
12.125
Max.
12.16
12.45
175
5.15
5.15
50
Units
VDC
mV p-p
A
VDC
mV p-p
A
5
5Vsb
20MHz Bandwidth
1.3
GENERAL
Parameter
Remote Sense
Efficiency
Turn on Delay
Transient Response
Current Sharing Accuracy
Hold-up Time, to 10.8V
Isolation
Conditions
Sum of +ve & -ve drops
Full load, high line
12V Ramp 1A/μs 33% step
5Vsb Ramp 1A/μs 33% step
200-720W load
2 in parallel
400W, 120V
ac
line
Output to Chassis-Basic
Input to Chassis-Basic
Full load and 100V
ac
input
Min.
Typ.
500
83
2
Max.
Units
mV
%
s
±375
±40
45/55
20
500
1500
0.02
mV
%
ms
Vrms
% /
°C
DESCRIPTION
The CEF400-112C is a 400W active power-
factor-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 I
2
C interface, built-in
fan and a 5V standby auxiliary output. The
CEF400-112 provides reliable 12V bulk power
for Information Technology Equipment and
Industrial Applications.
Temperature Coefficient
➀
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
Over Voltage
Over Current
Short Circuit
Over Voltage
Over Current
5Vsb
Unit
12V
Output Voltage
Conditions
Latching
Auto-restart
Min.
14.065
36
Typ.
14.5
38
Max.
14.935
42
Units
V
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
Auto-restart
5.6
1.4
2.1
6
2.65
V
A
Over-temperature
Input Undervoltage
Unit shall self-protect against excessive internal
temperatures and automatically recover.
For full details go to
www.murata-ps.com/rohs
No damage will be sustained by operation at voltages below the specified input
operating voltage range.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPS_CEF400-112C.B16 Page 1 of 3
MURATA [ MURATA MANUFACTURING CO., LTD. ]
