The high efficiency, low noise and long-term reli-
ability that defines Murata Power Solutions’ DC/
DC Converters now comes to you in the standard
“half-brick” configuration (2.3˝ x 2.4˝ x 0.40˝).
Our new UCH Series is certified to UL/EN60950-
1 safety requirements (some models pending),
including each European country’s deviations. All
models have BASIC insulation; guarantee 2250Vdc
(in to out) isolation; and because they are designed
with Class B thermal insulation, satisfy all safety
requirements over their full operating tempera-
tures. Construction/attach meets stringent RoHS-6
specifications.
UCH Models are designed for demanding tele-
com, datacom and networking applications. Their
“semi-synchronous-rectifier” design achieves
impressive efficiencies. Output voltages are
1.8 to 15 Volts. The input voltage range is 36 to 75
or 18 to 36 Volts. All models meet the Low Voltage
Directive (LVD).
For high reliability and affordability, Murata
Power Solutions utilizes high-speed automatic
assembly to construct the UCH’s proven SMT-
on-pcb designs. An optional baseplate offers full
output power at maximum temperature.
UCH’s feature input filters, input undervoltage
and overvoltage lockout, output current limiting,
short-circuit protection, and thermal shutdown.
Additionally, all devices have output trim capability
and an on/off control pin that can be ordered with
either logic type.
+SENSE
(6)
+V
OUT
(5)
CASE
(2)
SWITCH
CONTROL
–V
OUT
(9)
–V
IN
(1)
PMW
CONTROLLER
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
OPTO
ISOLATION
REFERENCE &
ERROR MAP
–SENSE
(8)
V
OUT
TRIM
(7)
Typical topology is shown.
*Can be ordered with positive (standard)
or negative (optional) polarity.
REMOTE*
ON/OFF
CONTROL
(3)
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
REG.-Nr. C457
(some models pending
certification)
www.murata-ps.com/support
MDC_UCH Models.D03
Page 1 of 18
Single Output UCH Models
Isolated, “Half-Brick”
1.8−15V Output DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
➀
Output
R/N (mVp-p)
➁
Root Family
➀
UCH-1.8/40-D48N-C
UCH-2.5/40-D48N-C
UCH-3.3/10-D24P-C
UCH-3.3/10-D48N-C
UCH-3.3/15-D48N-C
UCH-3.3/35-D24P-C
UCH-3.3/30-D48N-C
UCH-5/10-D48N-C
UCH-5/20-D24P-C
UCH-5/30-D48N-C
UCH-12/4.2-D48N-C
UCH-12/12.5-D48N-C
UCH-15/6.7-D48N-C
➂
V
out
I
out
Power
(Volts) (Amps) (Watts)
1.8
2.5
40
40
10
10
15
35
30
10
20
30
4.2
12.5
6.7
72
100
33
33
49.5
115.5
99
50
100
150
50.4
150
100.5
Typ.
50
Max.
100
100
Regulation (Max.)
Line
±0.125%
±0.1%
±0.2%
±0.2%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
±0.125%
Load
±0.25%
±0.2%
Input
I
in
,
I
in
,
full
V
in
Nom. Range no load load
(Volts) (Volts) (mA) (Amps)
48
48
24
48
48
24
48
48
24
36-75
36-75
18-36
36-75
36-75
18-36
36-75
36-75
18-36
50
50
1.72
2.34
1.54
0.77
1.16
5.41
2.29
1.17
4.6
3.43
1.16
3.37
2.28
Efficiency
Min.
85%
87.5%
Typ.
87%
Package C61
Case
inches
(mm)
3.3
50
80
87%
89%
100
5
12
12
15
60
50
60
80
50
70
150
100
150
150
±0.25%
48
36-75
90
2.4×2.28×0.40
90%
(61×57.9×10.2)
89%
90.5%
89%
91%
87.5% 90.5%
89% 92.6%
90%
92%
89%
85.5%
➀
Please refer to the full model number structure for additional ordering part numbers and options.
➁
All specifications are at nominal line voltage and full load, +25 °C. unless otherwise noted. See detailed specifications. Output capacitors are 1 µF ceramic in parallel with 10 µF electrolytic . Input cap is 22
µF, low ESR. I/O caps are necessary for our test equipment and may not be needed for your application.
➂
Pending UL and VDE certification.
As of October 2016, ONLY the following part number will be available: UCH-5/20-D24PB-C
PART NUMBER STRUCTURE
Output
Configuration:
Unipolar Single Output
Half-brick package
U CH
-
5
/
30
-
D48 N B H LX
-
C
RoHS Hazardous Materials Compliance
C =
RoHS-6 (does
not claim EU RoHS exemption 7b–lead in solder),
standard
Y =
RoHS-5 (with lead), optional, special order
Pin Length Option
Blank =
Standard pin length, 0.180 inches (4.6mm)
L1 =
0.110 inches (2.79mm)
L2 =
0.145 inches (3.68mm)
Nominal Output Voltage
Maximum Rated Output:
Current in Amps
Input Voltage Range:
D24
= 18-36 Volts
D48
= 36-75 Volts
*
*
Conformal Coating Option
Blank =
No coating, standard
H =
Coating added, optional
(built to order; contact Murata Power Solutions for MOQ and lead times.)
*
Optional Baseplate
Blank =
No Baseplate, standard
B =
Baseplate installed, optional quantity order
On/Off Control Logic
P =
Positive logic (standard for D24, optional for D48)
N =
Negative logic (standard for D48, optional for D24)
100 µSec to ±1% 100 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1%
of final value
of final value
of final value
of final value
of final value
of final value
of final value
2.7 max.
3.75 max.
59 max.
49
15
2250
1500
1500
100
1000
Basic insulation
15
5
Output may be shorted continuously to ground (no damage).
4.95 V max
Starts if external voltage is less than V
nom
.
4.62 max.
4.95 max.
19
40
35
Current limiting, hiccup autorestart. Remove overload for recovery.
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifica-
tions may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
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