“quarter brick” package requiring no heat sink for
most applications. The HPQ-12/25-D48 series de-
livers fixed 12 Vdc output at 300 Watts for printed
circuit board mounting. Wide range inputs on the
2.3” x 1.45” x 0.44” converter are 36 to 75 Volts
DC (48 Volts nominal), ideal for datacom and telecom
systems. The fixed output voltage is regulated to
within ±2%.
Advanced automated surface mount assembly
and planar magnetics deliver galvanic isolation
rated at 2250 Vdc for basic insulation. To power
digital systems, the outputs offer fast settling to
current steps and tolerance of higher capacitive
loads. Excellent ripple and noise specifications as-
sure compatibility to CPU’s, ASIC’s, programmable
logic and FPGA’s. No minimum load is required. For
systems needing controlled startup/shutdown, an
external remote On/Off control may use either posi-
tive or negative polarity. Remote Sense inputs com-
pensate for resistive line drops at high currents.
A wealth of self-protection features avoid prob-
lems with both the converter and external circuits.
These include input undervoltage lockout and
overtemperature shutdown using an on-board tem-
perature sensor. Overcurrent protection using the
“hiccup” autorestart technique provides indefinite
short-circuit protection. Additional safety features
include output overvoltage protection and reverse
conduction elimination. The synchronous rectifier to-
pology offers high efficiency for minimal heat buildup
and “no heat sink” operation. The HPQ-12/25-D48
series meets full safety standards to UL/EN/IEC/CSA
60950-1, 2nd edition and RFI/EMI conducted/radi-
ated emission compliance to EN55022, CISPR22 with
external filter.
Typical unit
FEATURES
12 Volts DC fixed output up to 25 Amps
Industry standard quarter brick 2.3” x 1.45” x
0.44” open frame package
Wide range 36 to 75 Vdc input voltages with
2250 Volt Basic isolation
Double lead-free assembly and attachment for
RoHS standards
Up to 300 Watts total output power
High efficiency (94.5%) synchronous rectifier
topology
Stable no-load operation with no required external
components
Operating temperature range -40 to +85° C.
with no heat sink required
Meets UL/EN 60950-1, CSA-C22.2 No. 60950-1,
2nd edition safety approvals
Extensive self-protection, current limiting and
shut down features
“X” optional version omits trim and sense pins
APPLICATIONS
Embedded systems, datacom and telecom
installations
Disk farms, data centers and cellular repeater sites
Remote sensor systems, dedicated controllers
Instrumentation systems, R&D platforms, auto-
mated test fixtures
Data concentrators, voice forwarding and
speech processing systems
F1
+Vin (3)
Barrier
+Vout (8)
External
DC
Power
Source
On/Off
Control
(2)
Controller
and Power
Open = On
Reference and
Error Amplifier
Trim (6)
polarity)
-Vin (1)
-Vout (4)
Figure 1. Connection Diagram
Typical topology is shown. Murata Power Solutions
recommends an external fuse.
* “X” option omits trim and sense pins.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
26 Jul 2010
email: sales@murata-ps.com
MDC_HPQ-12/25-D48 Series.A02
Page 1 of 12
HPQ-12/25-D48 Series
Isolated 300-Watt Quarter Brick DC/DC Converters
ORDERING GUIDE
➀
Output
R/N (mV
pk-pk)
Max.
150
Regulation (Max.)
➁
Line
Load
Input
Efficiency
Min.
Typ.
Package (C59)
Dimensions
(inches)
Dimensions
(mm)
I
OUT
V
OUT
(Amps, Power
Root Model
➀
(Volts) max.) (Watts) Typ.
HPQ-12/25-D48
12
25
300
120
I
IN
full
V
IN
Nom. Range
I
IN
no
load
(Volts) (Volts) load (mA) (Amps)
48
36-75
150
6.61
±0.125% ±0.25%
93.5% 94.5%
1.45x2.3x0.440 max. 36.8x58.4x11.2
➀
Please refer to the part number structure for additional ordering information 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 with no input caps.These
caps are necessary for our test equipment and may not be needed for your application.
PART NUMBER STRUCTURE
HPQ
-
12
/
25
-
D48 N B
Family
Series:
High Power
Quarter Brick
Nominal Output Voltage
H X 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 quantity 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
Trim & Sense Pins Option
Blank
= Trim and Sense installed, standard
X
= Trim and Sense removed
Conformal coating (optional)
Blank
= no coating, standard
H
= Coating added, optional
Maximum Rated Output :
Current in Amps
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
On/Off Control Polarity
N
= Negative polarity, standard
P
= Positive polarity, optional
Baseplate (optional)
Blank
= No baseplate, standard
B
= Baseplate installed, optional
Note:
Some model combinations may not be
available. Contact Murata Power Solutions for
availability.
Complete Model Number Example:
HPQ-12/25-D48NBHXL1-C
Negative On/Off logic, baseplate installed, conformally coated, trim and sense pins removed, 0.110˝ pin length, RoHS-6 compliance
www.murata-ps.com
26 Jul 2010
email: sales@murata-ps.com
MDC_HPQ-12/25-D48 Series.A02
Page 2 of 12
HPQ-12/25-D48 Series
Isolated 300-Watt Quarter Brick DC/DC Converters
MECHANICAL SPECIFICATIONS (THROUGH-HOLE MOUNT)
TOP VIEW
TOP VIEW
4 7 .2 4 ± 0 .2 0
1 .8 6 0 ± 0 .0 0 8
2 6 .1 6 ± 0 .2 0
1 .0 3 0 ± 0 .0 0 8
LABEL
3 4 .5 4
1 .3 6 0
3 6 .8
1 .4 5
M3 THREADED INSERT
4 PLACES SEE NOTE 1&2
5 6 .1 3
2 .2 1 0
5 8 .4
2 .3 0
Case C59
4 .2 0
0 .1 6 5
11.2
0.440 Max
0.015 minimum clearance
between standoffs and
highest component
PIN S 1-3,5-7:
0. 040±0. 001(1.016±0. 025)
PIN S 4,8:
0. 062±0. 001(1.575±0. 025)
1 2 .7
0 .5 0
SIDE VIEW
0.015 minimum clearance
between standoffs and
highest component
PIN S 1-3, 5-7:
0.040±0. 001(1.016±0. 025)
PIN S 4, 8:
0.062±0. 001(1.575±0. 025)
3 .6 9
0 .1 4 5
5 0 .8 0
2 .0 0 0
5 0 .8 0
2 .0 0 0
LABEL
1
1 5 .2 4
0 .6 0 0
2
3
4
5
6
7
8
1
7 .6 2
0 .3 0 0
1 5 .2 4
0 .6 0 0
1 5 .2 4
0 .6 0 0
3 6 .8
1 .4 5
2
3
4
5
6
7
8
7 .6 2
0 .3 0 0
5 8 .4
2 .3 0
OPEN FRAME PIN SIDE VIEW (NO BASEPLATE)
WITH BASEPLATE OPTION, PIN SIDE VIEW
➀
M3 bolts must not exceed 0.138˝ (3.5mm) depth below the baseplate surface.
➁
Applied screw torque must not exceed 5.3 in-lb. (0.6 N-m).
The 0.145˝ (L2) pin length is shown. Please refer to the part number structure for
alternate pin lengths.
These converters are plug-compatible to competitive units. Other units may use
different pin numbering or alternate outline views. When laying out your PC board,
follow the pin FUNCTION.
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
I/O Connections
(pin side view)
Pin
1
2
3
4
Function P32
Neg. Vin
Remote On/Off Control
Pos. Vin
Neg. Output
Pin
5
6
7
8
Function P32
Neg. Sense*
Trim*
Pos. Sense*
Pos. Output
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
* The Sense and Trim pins are removed for the “X” model option.
www.murata-ps.com
26 Jul 2010
email: sales@murata-ps.com
MDC_HPQ-12/25-D48 Series.A02
Page 3 of 12
1 5 .2 4
0 .6 0 0
HPQ-12/25-D48 Series
Isolated 300-Watt Quarter Brick DC/DC Converters
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Continuous
Input Voltage, Transient
Isolation Voltage
Input Reverse Polarity
On/Off Remote Control
Output Power
Output Current
Conditions
➀
Full power operation
Operating or non-operating,
100 mS max. duration
Input to output tested 100 mS
IEC/EN/UL 60950-1, 2nd edition
None, install external fuse
Power on or off, referred to -Vin
Minimum
36
Typical/Nominal
Maximum
75
100
2250
Units
Vdc
Vdc
Vdc
Vdc
Vdc
W
None
0
0
15
300
Current-limited, no damage,
0
25
A
short-circuit protected
Storage Temperature Range
Vin = Zero (no power)
-55
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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