applications include Optical Networking Equipment,
Wireless Base Station applications, Microwave
Radio communications, and Telecom and Data
Equipment applications.
Modules will supply an output power of up to
30 watts over the input range of 36-75V. The ULT
Series also provides a cost effective approach to
highly efficient systems requiring 12V, 5V, and 3.3V
voltages, eliminating the requirement for a “Bus
Converter” and multiple PoL converters. The ULT
family provides basic insulation with 1500Vdc iso-
lation meeting the requirements of UL/IEC 60950.
The ULT series modules are DOSA compatible
industry standard 1/32 brick.
F1
+Vin (1)
Barrier
+Vout (8)
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
Open = On
Reference and
Error Amplifier
Trim (6)
polarity)
-Vin (3)
-Vout (4)
Figure 1. Connection Diagram
Typical topology is shown. Murata Power
Solutions recommends an external fuse.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_ULT Series.F05
Page 1 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Root Model
V
OUT
(V)
3.3
5
12
I
OUT
Power
(A, max.)
(W)
7.5
5
2.5
24.75
25
30
R/N (mV pk-pk)
Regulation (max.)
V
IN
Nom.
(V)
Typ.
Max.
Line
Load
45
50
70
50
75
100
±0.15%
±0.1%
±0.075%
±0.2%
±0.125%
±0.125%
48
48
48
Input
Range I
IN
, no load
(V)
(mA)
36-75
36-75
36-75
20
20
20
I
IN
, full
load (A)
0.6
0.59
0.68
Efficiency
Min.
84%
87%
90%
Typ.
85.5%
89%
92%
Package
Case (inches)
0.92 x 0.75 x 0.35
0.92 x 0.75 x 0.35
0.92 x 0.75 x 0.35
ULT-3.3/7.5-D48
ULT-5/5-D48
ULT-12/2.5-D48
Please refer to the Part Number Structure when ordering.
All specifications are typical at nominal line voltage and full load, +25°C unless
otherwise noted. See detailed specifications. External input capacitors are
33μF electrolytic and three 1μF ceramic. Output ripple is measured with 400μF
capacitance across output pins for the 3.3Vout and 5Vout model. The 12Vout model
is measured with 188μF. Output caps are necessary for our test equipment and may
not be needed for your application.
Regulation specifications describe output voltage deviations from a nominal/midpoint
value to either extreme (50% load step).
PART NUMBER STRUCTURE
ULT
-
3.3
/
7.5
-
D48 N M Lx
-
C
Thirty-second-brick series (Unipolar)
RoHS Hazardous Substance Compliance
(does not claim EU RoHS exemption 7b–lead in solder)
C = RoHS-6
Pin Length Option (Thru-hole only)
Blank = Standard pin length 0.190˝ (4.8mm)
L1 = 0.110˝ (2.79mm)
➀
L2 = 0.145˝ (3.68mm)
➀
SMT Version Option
Blank = Through-hole mount, no SMT
M = Surface mount (MSL Rating 2)
➁
On/Off Control Logic Option
N = Negative
P = Positive
Nominal Output Voltage
Maximum Rated Output Current
Current in Amps
Input Voltage Range
D48 = 36-75 Volts (48V nominal)
➀
Special quantity order is required; samples available with standard pin length only.
➁
SMT (M) versions not available in sample quantities.
➂
Some model number combinations may not be available. See website or contact your local Murata sales representative.
www.murata-ps.com/support
MDC_ULT Series.F05
Page 2 of 26
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
FUNCTIONAL SPECIFICATIONS (ULT-3.3/7.5-D48-C)
ABSOLUTE MAXIMUM RATINGS
Conditions
➀
Minimum
Typical/Nominal
Maximum
Units
Input Voltage, Continuous
Input Voltage, Transient
15
Isolation Voltage
1500
Vdc
Input Reverse Polarity
none
Vdc
On/Off Remote Control
15
Vdc
Output Power
25
W
Output Current
Current-limited, no damage, short-circuit protected
7.5
A
Storage Temperature Range
Vin = Zero (no power)
-40
125
°C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifications Table is not implied or recommended.
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