MURATA HPQ Technical data

+VIN

(2)

(8)

(3)

(1)

(7)

–V

IN

OPTO

ISOLATION

REFERENCE &

ERROR AMP

PULSE

TRANSFORMER

INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS

REMOTE

ON/OFF

CONTROL

+VOUT

(4)

−V

OUT

(6)

V

OUT TRIM

+SENSE

(5)

−SENSE

SWITCH

CONTROL

PWM

CONTROLLER

HPQ Series

Isolated High Power Quarter Brick DC/DC Converters

Typical unit

FEATURES

n

3.3 Volts DC fixed output up to 50 Amps

n

Industry standard quarter brick 2.3" x 1.45" x

0.39" open frame package

n

Wide range 36 to 75 Vdc input voltages with 2250
Volt Basic isolation

n

Double lead-free assembly and attachment for RoHS
standards

n

Up to 165 Watts total output power

n

High efficiency synchronous rectifier topology

n

Stable no-load operation with no required external
components

n

Operating temperature range -40 to +85° C. with
no heat sink required

n

Designed to meet UL/EN 60950-1, CSA-C22.2 No.
60950-1, safety approvals

n

Extensive self-protection, current limiting and shut
down features

PRODUCT OVERVIEW

Unique among quarter-brick DC/DC converters, the
HPQ series offers very high output current (up to
50 Amps) in an industry standard “quarter brick”
package requiring no heat sink. The HPQ series
delivers up to 165 Watts fixed voltage output for
printed circuit board mounting. Wide range inputs
on the 2.3" x 1.45" x 0.39" converter are 36 to 75
Volts DC (48 Volts nominal), ideal for datacom and
telecom systems. The fixed output voltage is regu­lated to within ±1% and may be trimmed within
±10% of nominal output.

Advanced automated surface mount assembly
and planar magnetics deliver full magnetic and
optical isolation with Basic protection up to 2250
Volts. To power digital systems, the outputs offer
fast settling to current steps and tolerance of
higher capacitive loads. Excellent ripple and noise
specifications assure compatibility to CPU’s, ASIC’s,
programmable logic and FPGA’s. No minimum load
is required. For systems needing controlled startup/

APPLICATIONS

n

Embedded systems, datacom and telecom

installations

n

Disk farms, data centers and cellular repeater sites

n

Remote sensor systems, dedicated controllers

shutdown, an external remote On/Off control may
use either positive or negative polarity. Remote
Sense inputs compensate for resistive line drops at
high currents.

A wealth of self-protection features avoid prob­lems with both the converter and external circuits.
These include input undervoltage lockout and
overtemperature shutdown using an on-board tem­perature sensor. Excessive overcurrents limit their
power using the “hiccup” autorestart technique
and the outputs may be short-circuited indefinitely.
Additional safety features include output overvolt­age protection and reverse conduction elimination.
The synchronous rectifier topology offers high effi­ciency for minimal heat buildup and “no heat sink”
operation. The HPQ series is designed to meet full
safety certifications to UL/EN/IEC/CSA 60950-1 and
RFI/EMI conducted/radiated emission compliance
to FCC part 15 class B.

n

Instrumentation systems, R&D platforms, auto-

mated test fixtures

n

Data concentrators, voice forwarding and

speech processing systems

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com Technical enquiries email: [e-mail], tel: [phone]

Figure 1. Simplified Schematic

Typical topology is shown

MDC_HPQ Series.A04 Page 1 of 10

2.30 (58.4)

2.00 (50.8)

2.15 (54.6)

A

1.860 (47.2)

A

A

PINS 1-3, 5-7: 0.040 ±0.001 (1.016 ±0.025)
PINS 4 & 8: 0.060 ±0.001 (1.52 ±0.025)

#M3-THREAD X 0.15 DEEP
TYPICAL (4) PLACES

BASEPLATE

Optional baseplate

0.50 (12.7)
With Baseplate

0.40 (10.2)
Without Baseplate

0.18
(4.6)

Screw length
must not
go through
baseplate.

Optional mounting
holes, 4 places

Component locations
are typical and may
vary between models.

0.015 (0.4)
min. clearance
between highest
component and
pin shoulders

1.45

(36.8)

1.00

(25.4)

B

1.30

(33.0)

0.600 (15.2)
4 EQ. SP.

@ 0.150 (3.8)

B

B

BOTTOM VIEW

8

7

6

5

4

3

2

1

Third Angle Projection

Dimensions are in inches (mm shown for ref. only).

Components are shown for reference only.

Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚

HPQ Series

Isolated High Power Quarter Brick DC/DC Converters

ORDERING GUIDE ➀

Output Input

R/N (mV

pk-pk)

Typ. Max. Line Load Min. Typ.

Root Model ➀

Vo u t

(Volts)

Io u t

(Amps,

max.)

Power

(Watts)

HPQ-3.3/50-D48N-C 3.3 50 165 50 100 ±0.2% ±0.2% 48 36-75 80 3.82 88% 90% 1.45x2.3x0.39 36.8x58.4x9.9 P32

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.

MECHANICAL SPECIFICATIONS

Regulation

(Max.) ➁

Vin Nom.

(Volts)

Range

(Volts)

Iin no

load (mA)

Iin full

load

(Amps)

Efficiency Package

Dimensions

(inches)

Dimensions

(mm) Pinout

I/O Connections (pin side view)

Pin Function P32 Pin Function P32

1 Neg. Input 5 Neg. Sense
2 Remote On/Off Control 6 Output Trim
3 Pos. Input 7 Pos. Sense
4 Neg. Output 8 Pos. Output

Important! Always connect the sense pins. If they are not
connected to a remote load, wire each sense pin to its
respective voltage output at the converter pins.

Technical enquiries email: [e-mail], tel: [phone]www.murata-ps.com

MDC_HPQ Series.A04 Page 2 of 10

PART NUMBER STRUCTURE

HPQ Series

Isolated High Power Quarter Brick DC/DC Converters

HPQ

Family
Series:
High Power

Quarter Brick

Nominal Output Voltage

Maximum Rated Output :

Current in Amps

Input Voltage Range:
D48 = 36-75 Volts (48V nominal)

3.3

N

/

50-

D48

-

B

Baseplate (optional)

Blank = No baseplate, standard
B = Baseplate installed, optional quantity order

On/Off Control Polarity

N = Negative polarity, standard
P = Positive polarity, optional

-

CH

RoHS Hazardous Materials compliance

C = RoHS-6 (no lead), standard
Y = RoHS-5 (with lead), optional, special quantity order

Conformal coating (optional)

Blank = no coating, standard
H = Coating added, optional, special quantity order

Note: Some model combinations may not be
available. Contact Murata Power Solutions for
availability.

Performance and Functional Specifications

All specifications are typical unless noted. See Note 1.

Input

Input Voltage Range See Ordering Guide.
Recommended External Fuse 10 Amps
Start-Up Voltage 33.0 Volts
Undervoltage Shutdown 32.0 Volts
Overvoltage Shutdown None, see application notes.
Reflected (Back) Ripple Current (Note 2) 20 mA pk-pk
Internal Input Filter Type Pi-type
Reverse Polarity Protection (Note 15) See fuse information
Input Current:
Full Load Conditions See Ordering Guide.
Inrush Transient 0.05 A2Sec.
Shutdown Mode (Off, UV, OT) 10 mA
Output Short Circuit 50 mA
No Load, 3.3Vout 80 mA
Low Line (Vin=Vmin, 3.3Vout) 5.21 Amps
Remote On/Off Control (Note 5)

Positive Logic (“P” suffix)

Negative Logic (“N” suffix)

Current 1 mA

ON = +2.5 V. to +15 V. max. or open pin

OFF = 0 to +1 V. max. or ground pin

ON = -0.1 V. to +0.8 V. max. or ground pin

OFF = +2.5 V. to +15 V. max. or open pin

Technical enquiries email: [e-mail], tel: [phone]www.murata-ps.com

MDC_HPQ Series.A04 Page 3 of 10