For applications requiring improved electrical and
thermal performance at reduced cost, consider
DATEL’s 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 polarity), 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.
Contents
Description, Photograph, Connection Diagram
Ordering Guide, Model Numbering
Mechanical Specs, Input/Output Pinout
Detailed Electrical Specifications
Soldering Guidelines
Performance Data
Page
1
2
3
4
14
16
+SENSE
(7)
+V
OUT
(8)
+V
IN
(3)
SWITCH
CONTROL
–V
OUT
(4)
–V
IN
(1)
–SENSE
(5)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
V
OUT
TRIM
(6)
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
REMOTE
ON/OFF
CONTROL*
(2)
* Can be ordered with positive (standard) or negative (optional) polarity.
For full details go to
www.murata-ps.com/rohs
Typical topology may vary between units.
Figure 1. Simplified Schematic
www.murata-ps.com
01 Apr 2010
email: sales@murata-ps.com
MDC_UCQ Models.B17
Page 1 of 23
Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC/DC Converters
Performance Specifications and Ordering Guide
➀
ORDERING GUIDE
Output
R/N (mVp-p)
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
V
OUT
I
OUT
Power
(Volts) (Amps) (Watts)
Typ.
Max.
Regulation (Max.)
➁
Line
Load
V
IN
Nom.
(Volts)
Range
(Volts)
I
IN
no
load (mA)
Input
I
IN
full
load
(Amps)
Efficiency
Min.
Typ.
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
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
81%
81%
85%
83%
86%
82%
85%
87%
88.5%
89.5%
89%
88%
89%
88%
90%
90%
83%
83%
86%
86%
88%
84%
87%
89%
90%
91%
90%
91.5%
92%
90%
91%
92%
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)
On/Off Enable Control Ground Bounce Protection
To improve reliability, if you use a small signal transistor or other external
circuit to select the Remote On/Off control, make sure to return the LO side
directly to the –Vin power input on the DC/DC converter. To avoid ground
bounce errors, do not connect the On/Off return to a distant ground plane or
current-carrying bus. If necessary, run a separate small return wire directly to
the –Vin terminal. There is very little current (typically 1-5 mA) on the On/Off
control however, large current changes on a return ground plane or ground
bus can accidentally trigger the converter on or off. If possible, mount the On/
Off transistor or other control circuit adjacent to the converter.
DC/DC Converter
Preferred location
of On/Off control
adjacent to -Vin
terminal
+ Vin
On/Off Enable
On/Off
Control
Transistor
-Vin return
Ground plane or power return bus
Do not connect
control transistor
through remote
power bus
Install separate
return wire for
On/Off control
with remote
transistor
Figure 2. On/Off Enable Control Ground Bounce Protection
www.murata-ps.com
01 Apr 2010
email: sales@murata-ps.com
MDC_UCQ Models.B17
Page 2 of 23
Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC/DC Converters
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)*
*Special quantity order required
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 Polarity
P
=
Positive polarity (standard for D24, optional for D48)
N
=
Negative polarity (standard for D48, optional for D24)
Quarter-Brick Package
Nominal Output Voltage
Maximum Rated Output :
Current in Amps
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
Note:
Some model combinations
may not be available. Contact Murata
Power Solutions for availability.
MECHANICAL SPECIFICATIONS
0.40
(10.2)
UCQ with Optional Baseplate
2.30 (58.4)
A
2.30 (58.4)
B
B
1.860 (47.2)
A
A
1.45 (36.8)
1.03 (26.2)
0.18
(4.6)
PINS 1-3, 5-7:
0.040Ø ±0.002 (1.016 ±0.05)
PINS 4, 8:
0.062Ø ±0.002 (1.575 ±0.05)
0.015 minimum
clearance between
standoffs and
highest component
A
B
#M3 THD. X 0.15 DEEP
TYPICAL 4 PL.
SCREW LENGTH MUST
NOT GO THROUGH BASEPLATE
2.00 (50.8)
B
1
2
3
0.600
(15.2)
4
1.45 (36.8)
5
6
7
8
B
0.50
(12.7)
Case C67
BOTTOM VIEW
0.300
(7.6)
0.600 (15.24)
4 EQ. SP.
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
0.18
(4.6)
PINS 1-3, 5-7:
0.040Ø ±0.002 (1.016 ±0.05)
PINS 4, 8:
0.062Ø ±0.002 (1.575 ±0.05)
Component locations may vary between units.
Standard pin length is shown. Please refer to the Part
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