UEI25-120-D48N-C Murata Power Solutions Inc, UEI25-120-D48N-C Datasheet - Page 22

• Manufacturer Part Number: UEI25-120-D48N-C
• Description: CONV DC/DC 25W 12V
• Manufacturer: Murata Power Solutions Inc
• Series: UEI25-120r
• Type: Isolatedr

Specifications of UEI25-120-D48N-C

• Number Of Outputs: 1
• Output: 12V
• Power (watts): 25W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 6-DIP Module
• 1st Output: 12 VDC @ 2.1A
• Size / Dimension: 1.10" L x 0.96" W x 0.32" H (27.9mm x 24.4mm x 8.1mm)
• Power (watts) - Rated: 25W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 87.5%
• Approvals: CAN, CSA, EN, IEC, UL
• Output Power: 25.2 W
• Input Voltage Range: 36 V to 75 V
• Input Voltage (nominal): 48 V
• Output Voltage (channel 1): 12 V
• Output Current (channel 1): 2.1 A
• Package / Case Size: 24.38 mm x 27.94 mm x 8.13 mm
• Output Type: DC/DC Converter
• Output Voltage: 12 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 811-2222

Emissions Performance
Murata Power Solutions measures its products for radio frequency emissions
against the EN 55022 and CISPR 22 standards. Passive resistance loads are
employed and the output is set to the maximum voltage. If you set up your
own emissions testing, make sure the output load is rated at continuous power
while doing the tests.
included. Please refer to the fundamental switching frequency. All of this
information is listed in the Product Specifi cations. An external discrete fi lter is
installed and the circuit diagram is shown below.
[1] Conducted Emissions Parts List
[2] Conducted Emissions Test Equipment Used
„
„
„
„
[3] Conducted Emissions Test Results
dBμV
100
Graph 1. Conducted emissions performance with fi lter, Negative Line, CISPR 22, Class B,
Reference
L1
L2
C1, C2
C3
C4, C5
C6
DC Source
90
80
70
60
50
40
30
20
10
0
0.15
The recommended external input and output capacitors (if required) are
Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC
Rohde & Schwarz Software ESPC-1 Ver. 2.20
OHMITE 25W – 1 Ohm resistor combinations
DC Source Programmable DC Power Supply Model 62012P-100-50
Black
V+
V-
Part Number
PE-62913
VZ Series
VZ Series
Unknown
VZ Series
C1
NC
Figure 7. Conducted Emissions Test Circuit
L1
full load, for UEI25-033-D48PM-C
Test Card
Qty 2 - Electrolytic Capacitor 22ufd, 100V
1.0
Electrolytic Capacitor 22ufd, 100V
Electrolytic Capacitor 22ufd, 100V
C2
QP
L2
Description
3.3nF, 1500V
4.7uH, 3.6A
C3
1mH, 6A
Vin+
Vin-
UUT
C4
C5
Vout+
Vout-
C6
10.0
AV
www.murata-ps.com
Panasonic
Panasonic
Panasonic
Unknown
Resistive Load
Vendor
Murata
Resistive Load
inside a metal
Pulse
container
MHz
30.0
[4] Layout Recommendations
Most applications can use the fi ltering which is already installed inside the
converter or with the addition of the recommended external capacitors. For
greater emissions suppression, consider additional fi lter components and/or
shielding. Emissions performance will depend on the user’s PC board layout,
the chassis shielding environment and choice of external components. Please
refer to
recommend using an engineer who is experienced at emissions suppression.
Graph 3. Conducted emissions performance without fi lter, Negative Line, CISPR 22, Class
dBμV
100
dBμV
100
dBμV
100
Graph 2. Conducted emissions performance with fi lter, Negative Line, CISPR 22, Class B,
Graph 4. Conducted emissions performance with fi lter, Negative Line, CISPR 22, Class B,
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0.15
0.15
0.15
Since many factors affect both the amplitude and spectra of emissions, we
Application Note
Single Output Isolated 25-Watt DC/DC Converters
B, full load, for UEI25-050-D48NM-C
full load, for UEI25-050-D48NM-C
for further discussion.
full load, for UEI25-120-D48P-C
1.0
1.0
1.0
QP
QP
QP
07 Apr 2011
UEI25 Series
MDC_UEI25W.A03 Page 22 of 23
email: [e-mail]
10.0
10.0
10.0
AV
Average
AV
MHz
MHz
MHz
30.0
30.0
30.0