www.murata-ps.com
PRODUCT OVERVIEW
For efficient, fully isolated DC power in the small-
est space, Murata Power Solutions' UVQ series
quarter bricks offer output voltages from 1.5
to 48 Volts with currents up to 40 Amps. UVQs
operate over a wide temperature range (up to
+70°C at 200 lfm airflow) at full-rated power. The
optional mounting baseplate extends this to all
practical temperature ranges at full power.
UVQs achieve these impressive specifications
while delivering excellent electrical performance.
Overall noise is 35mVp-p (3.3V models) with fast
step response (down to 50µsec). These convert-
ers offer high stability even with no load and
tight output regulation. The unit is fully protected
against input over and undervoltage, output over-
current and short circuit. An on-board temperature
sensor shuts down the converter if thermal limits
are reached. Protection uses the “hiccup” (auto
restart) method.
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
A convenient remote On/Off control input oper-
ates by external digital logic, relay or transistor
input. To compensate for longer wiring and to
retain output voltage accuracy at the load, UVQs
include a Sense input to dynamically correct for
ohmic losses. A trim input may be connected to a
user’s adjustment potentiometer or trim resis-
tors for output voltage calibration closer than the
standard accuracy.
UVQs include industry-standard safety certifica-
tions and BASIC I/O insulation provides 2250 Volt
input/output isolation. Radiation emission testing
is performed to widely-accepted EMC standards.
The UVQs may be considered as higher perfor-
mance replacements for some Murata Power
Solutions USQ models.
Typical unit
FEATURES
Standard quarter-brick package/pinout
Outputs from 1.5 to 48V up to 125W
profile 0.42" height
Low
and 48Vdc nominal inputs
24
isolated, 2250Vdc (BASIC) insulation
Fully
Designed for RoHS-6 compliance
Output overvoltage/short-circuit protected
On/Off control, trim and sense functions
efficiency to 92%
High
Protected against temp. and voltage limits
Designed to meet UL/IEC/EN60950-1 safety
approvals
+SENSE
(7)
+V
IN
(1)
+V
OUT
(8)
Baseplate
(9)
Optional
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.
Typical configuration — some models use a different topology
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_UVQ Models.F06
Page 1 of 25
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Input
Efficiency)
Min.
86.5%
86%
87%
88.5%
87%
91%
88.5%
89%
88.5%
88.5%
90%
88%
88.3%
88%
89%
89%
91%
Typ.
Package
(Case,
Pinout)
R/N (mVp-p) Regulation (Max.)
➂
V
out
I
out
Power
V
in
Nom. Range I
in
,
No Load I
in
,
Full Load
(Volts) (Amps) (Watts) Typ. Max.
Line
Load
(Volts) (Volts)
(mA)
(Amps)
1.5
2.5
3.3
5
12
15
18
24
48
40
35
40
30
35
20
8
10
7
5.6
6
4.5
2.5
60
87.5
100
99
115.5
100
96
120
105
100.8
108
30
60
60
60
65
40
50
25
130
160
150
150
185
185
100
130
200
375
±0.075%
±0.05%
±0.05%
±0.1%
±0.05%
±0.05%
±0.05%
±0.1%
±0.075%
±0.05%
±0.05%
±0.05%
±0.05%
±0.075%
±0.075%
±0.1%
±0.175%
±0.05%
±0.05%
±0.05%
±0.25%
±0.25%
±0.05%
±0.05%
±0.1%
±0.05%
±0.05%
±0.02%
±0.075%
±0.075%
±0.15%
±0.25%
±0.2%
±0.2%
24
24
48
24
48
24
48
24
48
24
48
24
48
24
48
24
48
18-36
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
18-36
36-75
80
100
100
180
130
190
80
90
60
103
60
140
80
45
45
45
30
2.84
4.14
2.37
4.58
2.7
4.53
2.31
4.4
2.78
4.85
2.39
4.69
2.5
5.03
2.49
4.4
2.71
Root Models
UVQ-1.5/40-D24P-C
UVQ-2.5/35-D24P-C
UVQ-2.5/40-D48N-C
UVQ-3.3/30-D24P-C
➁
UVQ-3.3/35-D48N-C
➁
UVQ-5/20-D24P-C
UVQ-5/20-D48N-C
UVQ-12/8-D24P-C
UVQ-12/10-D48N-C
UVQ-15/7-D24P-C
UVQ-15/7-D48N-C
UVQ-18/5.6-D24P-C
UVQ-18/6-D48N-C
UVQ-24/4.5-D24P-C
UVQ-24/4.5-D48N-C
UVQ-48/2.5-D24P-C
UVQ-48/2.5-D48N-C
35
120
30
20
95
110
85
120
125
125
60
75
100
250
88%
88%
88%
90%
89%
92%
90%
91%
90% C59, P32
90.3%
91.5%
89.5%
90%
89.5%
90.5%
91%
92.3%
These are partial model numbers. Please refer to the full model number struc-
ture for complete ordering part numbers.
Min. I
out
= 3 Amps for UVQ-3.3 Vout models.
All specifications are at nominal line voltage and full load, +25°C unless other-
wise noted. See detailed specifications.
Output capacitors are 1uF ceramic || 10 uF electrolytic. Input cap is 22 uF, low
ESR, except UVQ-24/4.5 is 33uF and UVQ-48/2.5 uses no input cap. I/O caps are
necessary for our test equipment and may not be needed for your application.
I
out
= 14 Amps max. with V
in
= 18-19.5 Volts.
UVQ-12/10-D48NB-C
UVQ-12/10-D48N-C
UVQ-12/10-D48PB-C
UVQ-12/10-D48P-C
UVQ-12/10-D48PL2-C
UVQ-15/7-D48NB9-C
UVQ-15/7-D48NB9L2-C
UVQ-15/7-D48NB-C
UVQ-15/7-D48N-C
UVQ-15/7-D48PB-C
UVQ-15/7-D48P-C
UVQ-18/6-D48NB-C
UVQ-18/6-D48N-C
UVQ-18/6-D48PB-C
UVQ-18/6-D48P-C
UVQ-5/20-D24NB-C
UVQ-5/20-D24N-C
UVQ-5/20-D48NB-C
UVQ-5/20-D48N-C
UVQ-5/20-D48PB-C
UVQ-5/20-D48P-C
Model UVQ-31128-C
is a standard model UVQ-5/20-D48NB-C with modified rise time to reach 4.75V within 10 mSec. All other specifications are as per the
standard product.
UVQ Pin 9 Baseplate Connection
The UVQ series may include an optional installed baseplate for extended
thermal management. Various UVQ models (see list below) are also available
with an additional pin 9 on special order which connects to the baseplate but is
electrically isolated from the rest of the converter. Please refer to the mechani-
cal drawings.
Pin 9 offers a positive method of controlling the electrical potential of the
baseplate, independent of the converter. Some baseplate models cannot
include pin 9 and in such cases, the baseplate is grounded by the mounting
bolts. Or consider adding an external lugged washer with a grounding terminal.
The baseplate may be ordered by adding a “B” to the model number tree
and pin 9 will be pre-installed by adding a “9”. The two options are separate.
Please refer to the Ordering Guide. Do not order pin 9 without the baseplate.
Note that “pin 9” converters may be on limited forecast, requiring minimum
order quantities and scheduled deliveries.
Models available with Pin 9:
UVQ-12/10-D48
UVQ-1.5/40-D24
Models which are NOT available with Pin 9:
UVQ-5/20-D24 and –D48
UVQ-3.3/30-D24
UVQ-3.3/35-D48
UVQ-2.5/35-D24
UVQ-2.5/40-D48
Other models which are not listed will be reviewed for future pin 9 accomo-
dation.
www.murata-ps.com/support
MDC_UVQ Models.F06
Page 2 of 25
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
PART NUMBER STRUCTURE
U VQ
-
3.3
/
20
-
D48 N B 9 LX
-
C
RoHS-6 hazardous substance compliant
Output Configuration
U = Unipolar/Single
(does
not claim EU RoHS exemption 7b–lead in solder)
Alternate Pin Length:
(special quantity order)
Blank =
Standard pin length
L1
= 0.110 (2.79mm)
L2
=
0.145 (3.68mm)
Quarter-Brick Package
Nominal Output Voltage
1.2 to 48 Volts
Baseplate Pin 9, see Mechanical Drawings:
(special order)
Blank =
No pin 9, standard
9
= Pin 9 installed (see description on pg. 2), optional
Maximum Rated Output
Current in Amps
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
Blank =
No baseplate, standard
B =
Baseplate installed, optional special order
Remote On/Off Control Logic:
Some model number combinations may not be
Add "P" for positive logic
available. Contact Murata Power Solutions.
Add "N" for negative logic
Positive "P" logic is standard for D24 models and
optional special order for D48 models. Negative "N"
logic is standard for D48 models and optional special
order for D24 models.
* Note:
ORDERING GUIDE SUMMARY
Model
V
out
Range
All Models
1.2V to 48V
INPUT CHARACTERISTICS
Parameter
Voltage Range
Current, full power
Isolation
Remote On/Off Control
OUTPUT CHARACTERISTICS
Parameter
Voltage
Current
Accuracy
Ripple & Noise (to 20MHz)
Line and Load Regulation
Overcurrent Protection
Overtemperature Protection
Efficiency (minimum)
GENERAL SPECIFICATIONS
Parameter
Dynamic Load Response
Operating Temperature Range
Safety
I
out
Range
2.5A to 40A
V
in
Range
18-36V or 36-75V
Efficiency
Up to 92.%, model dependent
Notes
24V or 48V nominal
Model dependent
Model dependent
Positive or negative logic
Notes
Trimmable
No minimum load
Most models
Model dependent
Model dependent
With hiccup auto-restart
Typ. @ 25°C, full load
18-36 or 36-75 Volts
Up to 5.6 Amps
2kVdc to 2250V
Switch or FET control
Typ. @ 25°C, full load
1.5 to 48 Volts ±10%
2.5 to 40 Amps fullscale
Down to 1% of V
NOM
Down to 35mVp-p
Down to ±0.125%/±0.25%
150% of I
OUT
max.
+125°C
See Performance Specifications
Typ. @ 25°C, full load
Down to 50μsec
–40 to +110°C
UL/IEC/EN 60950-1
Notes
Model dependent
With baseplate, see derating curve
and CSA C22.2-No.234
MECHANICAL CHARACTERISTICS
With baseplate
1.45 x 2.30 x 0.5 inches (36.83 x 58.42 x 12.7 mm)
Without baseplate
1.45 x 2.30 x 0.42 inches (36.83 x 58.42 x 10.67 mm)
See Performance Specifications, page 2
www.murata-ps.com/support
MDC_UVQ Models.F06
Page 3 of 25
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
Performance/Functional Specifications 24V Models
UVQ-1.5/40-D24
UVQ-2.5/35-D24
Typical @ T
a
= +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)
UVQ-3.3/30-D24
UVQ-18/5.6-D24
UVQ-24/4.5-D24
Input
Input voltage range
Start-up threshold, (V) min.
Undervoltage
shutdown, (V)
14
Overvoltage shutdown (V)
Reflected (back) ripple
current
2
Input Current
Full load conditions
Inrush transient, (A
2
sec)
Output short circuit, (mA)
No load, mA
Low line (V
in
= min.),
(Amps)
Standby mode,
(Off, UV, OT shutdown)
Internal input filter type
Reverse polarity
protection
Remote On/Off Control
5
Positive logic, "P" suffix
(specifications are max)
Negative logic, "N" suffix
(specifications are max)
Current
OFF = Ground pin to +0.8V
ON = Open or +5V to +V
in
max.
OFF = Open or +5V to +V
in
max
ON = Ground pin to+0.8V max
1-8 mA, model dependent
L-C
See notes.
0.5
40
80
3.79
100
5.49
0.5
0.05
50
180
6.04
190
5.57
0.5
See ordering guide.
0.1
10
90
5.93
1
320
103
6.52
1
50
140
6.29
0.05
50
45
6.67
0.05
50
30
3.60
17
17
16
none
17
17
See ordering guide
17
16.25
17
16
39
10-50 mA pk-pk, model dependent
17
16.25
17
16
none
17
16
1-4mA, model dependent
Pi-type
L-C
www.murata-ps.com/support
MDC_UVQ Models.F06
Page 4 of 25
UVQ-48/2.5-D24
UVQ-5/20-D24
UVQ-12/8-D24
UVQ-15/7-D24
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
Performance/Functional Specifications 24V Models
UVQ-1.5/40-D24
UVQ-2.5/35-D24
Typical @ T
a
= +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)
UVQ-3.3/30-D24
UVQ-18/5.6-D24
UVQ-24/4.5-D24
Output
Voltage output range
Voltage output accuracy
(50% load)
Adjustment range
Temperature coefficient
Minimum loading
Remote sense
compensation
Ripple/noise
Line/Load regulation
Efficiency
Maximum capacitive
loading, Low ESR
<0.02Ω max.,
resistive load, (μF)
Current limit inception
(98% of V
out
, after
warmup), (Amps)
Short circuit protection
method
Short circuit current,
(Amps)
Short circuit duration
Overvoltage protection, (via
magnetic feedback)
Isolation Characteristics
Isolation Voltage
Input to Output, (Volts min)
Input to baseplate
Baseplate to output,
(Volts min)
Isolation resistance
Isolation capacitance, (pF)
Isolation safety rating
1500
1500
1000
100 MΩ
1000
Basic insulation
2000
1000-1500
2000
1500
1500
2.3 Volts
3 Volts max
3.6
3
45
10,000
5000
No minimum load
3 amps
+10%.
See ordering guide.
See ordering guide.
See ordering guide.
4700
2200
±1.5% of V
nom
See ordering guide.
±1.25% of V
nom
–20 to +10% of V
nom
.
±0.02% of V
out
range per °C
No minimum load
±1% of V
nom
±10% of V
nom
.
44
36
24
10
9.5
7.2
5.8
Current limiting, hiccup autorestart. Remove overload for recovery.
3
3
1.5
14.4 Volts
max
15 mA
3
5
2.8
Output may be shorted continuously to ground (no damage).
4 Volts max 6.8 Volts max
18.5 Volts
22 Volts max 29 Volts max 59 Volts max
www.murata-ps.com/support
MDC_UVQ Models.F06
Page 5 of 25
UVQ-48/2.5-D24
3.4
UVQ-5/20-D24
UVQ-12/8-D24
UVQ-15/7-D24
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