EMS Series, DC-DC Converter Data Sheet
Wide-Range Input; 3.3 & 5.0 VDC @ 50W Output
Features
RoHS lead-free solder and lead-solder-
exempted products are available
Ultra-wide input range: 18 – 60 VDC
38% smaller footprint than standard 1/4
th
-bricks
Cost-effective, single board construction
Low profile
High efficiency
Input-to-output isolation: 1500 VDC
Basic Insulation
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Input undervoltage lockout
Overtemperature protection
Approved to UL 60950-1-03/ CAN/CSA-C22.2
No. 60950-1, and TUV approved to EN 60950-1,
IEC 60950-1
Applications
Wireless Base Stations
Telecommunications equipment
LAN/WAN
Data processing
Industrial applications
Description
The EMS Series of DC-DC converters provide a single isolated step-down voltage (3.3 or 5 VDC nominal) from a
wide-input voltage range (18 – 60 VDC). The EMS is an excellent choice in applications where multiple input
voltage options are required. The designer can use a single EMS converter to cover both 24Vin and 48Vin input
ranges, eliminating the need to specify multiple modules to handle each input range. This is particularly useful in
wireless base station applications where the power plants tend to vary and could provide nominal 24 or 48 V input.
The EMS converters are highly efficient over the entire wide-input voltage range, cost-effective, and offer a low
profile, industry-standard quarter-brick footprint. The standard feature set includes remote on/off, remote output
voltage sensing, industry standard output trim, input undervoltage lockout, and overtemperature shutdown with
hysteresis.
Model Selection
Model
Input
Voltage
VDC
18 - 60
18 - 60
Input
Current, Max
(1)
ADC
3.2
3.2
Output
Voltage
VDC
3.3
5.0
Output Rated
Current, I
RATED
ADC
15
10
Output
Ripple/Noise,
mV
P-P
50
50
(2)
Typical
Efficiency @
I
RATED
& 36V
IN
90%
90%
EMS15DE
EMS10DG
This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be
followed.
1
2
@ V
IN
minimum.
Nominal, (DC to 500 kHz)
Model numbers highlighted in yellow or shaded are not recommended for new designs.
MCD10112 Rev. 1.1, 27-Jan-10
Page 1 of 17
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EMS Series, DC-DC Converter Data Sheet
Wide-Range Input; 3.3 & 5.0 VDC @ 50W Output
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect
long-term reliability, and cause permanent damage to the converter.
Parameter
Input Voltage
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
Output Power
1
2
1
Conditions/Description
Continuous
Transient Withstand (100 ms)
Hot Spot Monitor Location (Tc)
Ambient
Ambient
Referenced to -Vin
EMS15DE
EMS10DG
2
Min
0
-40
-40
-55
-0.7
Max
60
100
100
85
125
20
49.5
50
Units
VDC
VDC
C
C
C
VDC
W
W
With appropriate power derating, see Figures 27 - 32.
See temperature probe location T
C
, Figure 26. [Ref.V10 case]
Environmental and Mechanical Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Operating Humidity
Storage Humidity
Shock
Sinusoidal Vibration
Weight
Water Washing
MTBF (Calculated)
Dimensions
Markings & Labeling
Conditions/Description
Relative Humidity, Non-condensing
Relative Humidity, Non-condensing
(Half-sinewave, 6ms), 3 axes
GR-63-CORE, Section 5.4.2
Standard process
Per Telcordia SR-332 Issue 1,
O
(method 1, case 2, GB, 40 C)
(Overall)
50
1
0.53/15
Yes
1,750
2.3 (58.42) x 0.896 (22.76)
x 0.42 (10.7)
Min
Nom
Max
95
95
Units
%
%
g
g
Oz/g
kHrs
in (mm)
Includes P/N, Logo, Date Code, Country of Manufacture
Isolation Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Insulation Safety Rating
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Conditions/Description
Input to Output
Input to Output
Input to Output
Min
1500
10
2,700
Nom
Basic
Max
Units
VDC
MΩ
pF
MCD10112 Rev. 1.1, 27-Jan-10
Page 2 of 17
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EMS Series, DC-DC Converter Data Sheet
Wide-Range Input; 3.3 & 5.0 VDC @ 50W Output
EMI & Safety Regulatory Compliance
Safety Agency
UL
TUV product service
CB report
Declaration of Conformity
Conducted Emissions
1
1
Standard Approved To:
UL60950-1-03 / CSA C22.2 No. 60950-1
TUV EN60950-1/A11:2004
IEC60950-1:2001
DIR 73/23/EEC Low Voltage Directive
(with external EMI filter)
Marking
cURus
TUV PS Baurt mark
N/A
CE
CISPR 22 class A
See figures 33 & 34.
Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Input Voltage
Turn-On Input Voltage (UVLO)
Turn-Off Input Voltage
Turn-Off Hysteresis
Input Reflected Ripple Current
No-load Input Current
No-load Power Dissipation
Disabled Input Current
Input Capacitance (internal)
Minimum Input Capacitance
(external)
Inrush Transient
1
1
1
Conditions/Description
Continuous
Ramping Up
Ramping Down
@ I
RATED
, 12µH source inductance
2
BW=20 MHz
18 VDC < Vin < 60 VDC
Vin = 36 VDC
18 VDC < Vin < 60 VDC
(ESR <0.7
Ω)
Min
18
15
13
1
Nom
16.5
15.5
10
90
25
Max
60
18
17
72
150
4
50
1
Units
VDC
VDC
VDC
VDC
mA
P-P
mA
W
mA
µF
µF
33
0.1
A
2
s
See figure 2.
2
Vin = 36Vin; see Figures 1 and 36.
MCD10112 Rev. 1.1, 27-Jan-10
Page 3 of 17
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EMS Series, DC-DC Converter Data Sheet
Wide-Range Input; 3.3 & 5.0 VDC @ 50W Output
Output Specifications
All specifications apply over specified input voltage, output load, and @ 40
O
C ambient temperature, unless
otherwise noted.
EMS15DE: 3.3V / 15A
Parameter
Output Voltage
(Set-point)
Line Regulation
Load Regulation
Temperature Coefficient
Total Error Band
Output Power
Output Current
1
1
Conditions/Description
Vin = 36 V, Io =25 A
Vi =18 V to 60 V, Io =50% Io.max
Vin =36 V, Io.min to Io.max
-40
C
< T
AMB
< +85
C
(Line, Load, Temperature,
Ripple, Life)
w/ proper thermal derating
w/ proper thermal derating
Vin = 36 V, Vo < 90% Vo
NOM
Over line and load,
-40
C
< T
AMB
< +85
C
(DC to 20 MHz)
75-100-75% load step change,
to 1% error band, Co = 0 µF
Slew = 1.0 A/S >>>
Slew = 0.1 A/S >>>
Vin
NOM
, I
O
=
I
RATED
Overall input voltage, load,
and temperature conditions
5
Min
3.25
Nom
3.30
Max
3.35
10
0.3
25
0.75
0.02
Units
VDC
mV
%
mV
%
%/C
VDC
%
W
A
%Iomax
mV
P-P
%
mV
RMS
mV
s
mV
s
%
%Vout
ms
ms
ms
F
kHz
3.12
3.48
+/- 5.5
49.5
0
120
50
1.5
17
15
160
100
3.0
35
Output Current Limit Threshold
2
Output Ripple
3
Dynamic Regulation
Peak Deviation
Settling Time
Peak Deviation
Settling Time
Efficiency
4
+/-200
150
+/-100
150
90
5
3
25
1
330
300
+/-300
250
+/-200
250
10
10
50
2
4,950
(T
AMB
=40
C)
5
Turn-on Overshoot
Turn-On Time
Turn-On Time
f
(VIN)
Time from Vin = UVLO to
90% of Vout
NOM
6
f
(On/Off)
5
Time from enable to
90% of Vout
NOM
From 10 to 90% of Vout
NOM
7
Rise Time
Admissible Load Capacitance
Switching Frequency
I
RATED
, Nom Vin
Notes:
1
See Figure 27 - 29.
2
See Figure 15 for ripple waveform and Figure 35 for measurement method.
3
See Figures 9, 10 and 11.
4
See Figure 3.
5
See Figure 5.
6
See Figure 7.
7
A minimum 330
µ
F (AVX, TPSD337K006R0045) is recommended for operation over full load, line, and temperature range.
MCD10112 Rev. 1.1, 27-Jan-10
Page 4 of 17
www.power-one.com
EMS Series, DC-DC Converter Data Sheet
Wide-Range Input; 3.3 & 5.0 VDC @ 50W Output
Output Specifications (Cont’d)
All specifications apply over specified input voltage, output load, and @ 40
O
C ambient temperature, unless
otherwise noted.
EMS10DG: 5V / 10A
Parameter
Output Voltage
(Set-point)
Line Regulation
Load Regulation
Temperature Coefficient
Total Error Band
Output Power
Output Current
1
1
Conditions/Description
Vi = 36 V, Io =14 A
Vi =18 V to 60 V, Io =50% Io.max
Vi =36 V, Io.min to Io.max
-40
C
< T
AMB
< +85
C
(Line, Load, Temperature,
Ripple, Life)
w/ proper thermal derating
w/ proper thermal derating
Vin = 36 V, Vo < 90% Vo
NOM
Over line and load,
-40
C
< T
AMB
< +85
C
(DC to 20 MHz)
75-100-75% load step change,
to 1% error band, Co = 0 µF
Slew = 1.0 A/S >>>
Slew = 0.1 A/S >>>
Vin
NOM
, I
O
=
I
RATED
Overall input voltage, load,
and temperature conditions
5
Min
4.925
Nom
5.0
Max
5.075
15
0.3
25
0.5
0.02
Units
VDC
mV
%
mV
%
%/C
VDC
%
W
A
%Iomax
mV
P-P
%
mVrms
4.76
5.24
+/- 4.8
50
0
120
50
1.0
17
10
180
120
2.4
42
Output Current Limit Threshold
2
Output Ripple
1
Dynamic Regulation
Peak Deviation
Settling Time
Peak Deviation
Settling Time
Efficiency
4
+/-150
150
+/-100
150
90
5
3
25
3
220
300
+/-250
250
+/-200
250
10
10
50
6
3,300
mV
s
mV
S
%
%Vout
ms
ms
ms
F
kHz
(T
AMB
=40
C)
5
Turn-on Overshoot
Turn-On Time
Turn-On Time
f
(VIN)
Time from Vin = UVLO to
90% of Vout
NOM
6
f
(On/Off)
5
Time from enable to
90% of Vout
NOM
From 10 to 90% of Vout
NOM
7
Rise Time
Admissible Load Capacitance
Switching Frequency
I
RATED
, Nom Vin
Notes:
1
See Figure 30 - 32.
2
See Figure 16 for ripple waveform and Figure 35 for measurement method.
3
See Figures 12, 13 and 14.
4
See Figure 4.
5
See Figure 6.
6
See Figure 8.
7
A minimum 220
µ
F (AVX, TPSD227K010R0050) is recommended for operation over full load, line, and temperature range.
MCD10112 Rev. 1.1, 27-Jan-10
Page 5 of 17
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