For applications requiring improved electrical and
thermal performance at reduced cost, consider
Murata Power Solutions’ new UCQ series “quarter
brick” DC-DC power converters. These compact
units measure just 1.45" x 2.3" x 0.4" (36.8 x 60.9
x 10.2 mm) and fit the industry-standard footprint.
Available outputs range between 1.2V @ 30 Amps
to 15V @ 6.7 Amps and accept a wide input range.
The UCQ’s interleaved, synchronous-rectifier
topology offers high efficiency (up to 93%), tight
line and load regulation, low noise and fast step
response. A single-board optimized open-frame
design contributes to impressive thermal opera-
tion. UCQ’s will operate up to +70°C and 100 LFM
airflow with no derating.
The UCQ’s feature full isolation to 2250Vdc
meeting BASIC insulation requirements of
UL/EN/IEC 60950-1. Input filters reduce propa-
gated switching noise back to input sources. Also
included is a remote On/Off switch control (with
positive or negative logic), output trim adjustable
over nominal and output sense functions to reduce
power lead losses. Extensive protection items
avoid damage from out of limit voltages, currents
and temperatures. Protection faults automatically
recover using the hiccup technique. Besides safety
testing to 60950-1, certifications for the UCQ in-
clude application for EMC compliance (to EN55022/
CISPR22 with filter), qualification testing.
+SENSE
(7)
+V
IN
(1)
+V
OUT
(8)
SWITCH
CONTROL
–V
OUT
(4)
–V
IN
(3)
–SENSE
(5)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
V
OUT
TRIM
(6)
REMOTE
ON/OFF
CONTROL*
(2)
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
* Can be ordered with positive (standard) or negative (optional) polarity.
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
Typical topology may vary between units.
www.murata-ps.com/support
MDC_UCQ Models.E03
Page 1 of 24
Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
➀
Output
R/N (mVp-p)
V
out
I
out
Power
(Volts) (Amps) (Watts) Typ. Max.
1.2
1.2
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
3.3
3.3
5
5
5
12
15
40
30
25
40
30
40
40
30
35
20
30
40
20
20
25
8.3
6.7
48
36
37.5
60
54
72
100
75
115.5
66
99
132
100
100
125
99.6
100.5
50
50
50
80
50
80
50
80
50
50
60
50
35
50
100
100
100
80
100
100
100
120
100
120
80
80
100
60
55
100
150
150
Regulation (Max.)
➁
Line
Load
V
in
Nom.
(Volts)
Input
I
in
full
Range
I
in
no
load
(Volts) load (mA) (Amps)
Efficiency
Min.
81%
81%
85%
83%
86%
82%
85%
87%
88.5%
89.5%
89%
88%
89%
88%
90%
90%
Typ.
83%
83%
86%
86%
88%
84%
87%
89%
90%
91%
90%
91.5%
92%
90%
91%
92%
Root Models
➀
UCQ-1.2/40-D24P-C
UCQ-1.2/30-D48N-C
UCQ-1.5/25-D48N-C
UCQ-1.5/40-D48N-C
UCQ-1.8/30-D48N-C
UCQ-1.8/40-D48N-C
UCQ-2.5/40-D24P-C
UCQ-2.5/30-D48N-C
UCQ-3.3/35-D24P-C
UCQ-3.3/20-D48N-C
UCQ-3.3/30-D48N-C
UCQ-3.3/40-D48N-C
UCQ-5/20-D24P-C
UCQ-5/20-D48N-C
UCQ-5/25-D48N-C
UCQ-12/8.3-D48N-C
UCQ-15/6.7-D48N-C
Please contact Murata Power Solutions for further information.
±0.125%
±0.25%
48
36-75
30
0.90
±0.125%
±0.25%
48
36-75
50
0.94
±0.125%
±0.25%
48
36-75
50
1.45
±0.125%
±0.25%
48
36-75
45
1.31
±0.1%
±0.2%
48
36-75
30
1.70
±0.125%
±0.25%
24
18-36
120
4.96
±0.125%
±0.25%
48
36-75
50
1.80
±0.25%
±0.25%
24
18-36
130
5.41
±0.125%
±0.25%
48
36-75
50
1.53
±0.125%
±0.25%
48
36-75
50
2.3
±0.1%
±0.2%
48
36-75
30
3.06
±0.125%
±0.25%
24
18-36
160
4.55
±0.125%
±0.25%
48
36-75
80
2.26
±0.125%
±0.25%
48
36-75
30
2.89
±0.125%
±0.25%
48
36-75
80
2.28
±0.125%
±0.25%
48
36-75
100
2.28
As of October 2016, ONLY the following part numbers will be available: UCQ-3.3/30-D48N-C; UCQ-5/20-D48N-C;
UCQ-5/20-D48NB-C; UCQ-5/25-D48NB-C
➀
Please refer to the part number structure for additional ordering part numbers and options.
➁
All specifications are at nominal line voltage and full load, +25 deg.C unless otherwise noted. See detailed specifications. Output capacitors are 1 µF ceramic || 10 µF electrolytic. I/O caps are necessary for
our test equipment and may not be needed for your application.
Outline dimensions:
2.3 × 1.45 × 0.40 inches
58.4 × 36.8 × 10.2 mm
Pinout: P32
(all models)
PART NUMBER STRUCTURE
Output
Configuration:
Unipolar,
single output
U CQ
-
3.3
/
30
-
D48 N B
H Lx
-
C
RoHS Hazardous Materials compliance
C
= RoHS-6, standard (does not claim EU RoHS exemption 7B–lead in solder)
Y
= RoHS-5 (with lead), optional, special order
Pin length option
Blank
= standard pin length 0.180 in. (4.6 mm)
L1
= 0.110 in. (2.79 mm)*
L2
= 0.145 in. (3.68 mm)*
Conformal coating
(optional)
Blank
= no coating, standard
H
= coating added, optional special order
Baseplate
(optional)
Blank
=
No baseplate
, standard
B
=
Baseplate installed
, optional special order
On/Off Control Logic
P
=
Positive logic (standard for D24, optional for D48)
N
=
Negative logic (standard for D48, optional for D24)
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