HPQ-3.3/50-D48PL2-C [MURATA]
DC-DC Regulated Power Supply Module, 1 Output, 165W, Hybrid, PACKAGE-8;
| 型号： | HPQ-3.3/50-D48PL2-C |
| 厂家： | 
muRata |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 165W, Hybrid, PACKAGE-8 |
| 文件： | 总11页 (文件大小：280K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
s
Typical unit
FEATURES
PRODUCT OVERVIEW
Unique among quarter-brick DC-DC converters,
the HPQ-3.3/50-D48 series offers very high output
current (up to 50 Amps) in an industry standard
“quarter brick” package requiring no heat sink. The
HPQ-3.3/50-D48 series delivers up to 165 Watts
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.
3.3 Volts DC fixed output up to 50 Amps
Industry standard quarter brick 2.3" x 1.45" x
0.40" open frame package
Wide range 36 to 75 Vdc input voltages with 2250
Volt Basic isolation
A wealth of self-protection features avoid prob-
fixed voltage output for printed circuit board mount- lems with both the converter and external circuits.
Double lead-free assembly and attachment for RoHS
standards
ing. Wide range inputs on the 2.3" x 1.45" x 0.40"
converter are 36 to 75 Volts DC (48 Volts nominal),
ideal for datacom and telecom systems. The fixed
output voltage is regulated to within 1ꢀ and may
be trimmed within 10ꢀ 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
These include input undervoltage lockout and
overtemperature shutdown using an on-board tem-
perature sensor. Excessive overcurrents limit their
power using the “hiccup” autorestart technique
and the outputs may be short-circuited indefinitely.
Additional safety features include output overvolt-
age protection and reverse conduction elimination.
The synchronous rectifier topology offers high
efficiency for minimal heat buildup and “no heat
sink” operation. The HPQ-3.3/50-D48 series meets
safety certifications to UL/EN/IEC/CSA 60950-1,
Up to 165 Watts total output power
High efficiency 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,
safety approvals, 2nd Edition
specifications assure compatibility to CPU’s, ASIC’s, 2nd Edition and RFI/EMI conducted/radiated
programmable logic and FPGA’s. No minimum load emission compliance to EN55022-CISPR22 with
is required. For systems needing controlled startup/ external filter.
Extensive self-protection, current limiting and shut
down features
APPLICATIONS
Instrumentation systems, R&D platforms, auto-
Embedded systems, datacom and telecom
installations
mated test fixtures
Disk farms, data centers and cellular repeater sites
Data concentrators, voice forwarding and
speech processing systems
Remote sensor systems, dedicated controllers
+SENSE
(7)
+VIN
(1)
+VOUT
(8)
SWITCH
CONTROL
−VOUT
(4)
–VIN
(3)
−SENSE
(5)
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
PULSE
TRANSFORMER
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
VOUT TRIM
(6)
REMOTE
ON/OFF
CONTROL
(2)
Figure 1. Simplified Schematic
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
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MDC_HPQ-3.3/50-D48 Series.B01 Page 1 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Output
Input
R/N (mV
pk-pk)
Regulation
(Max.) ➁
Efficiency
Package
Dimensions
(mm)
IOUT
IIN full
load
VOUT (Amps, Power
VIN Nom. Range
IIN no
Dimensions
(inches)
(Volts) max.) (Watts) Typ. Max. Line Load (Volts) (Volts) load (mA) (Amps) Min. Typ.
Pinout
Root Model ➀
HPQ-3.3/50-D48
3.3 50 165 50 100 0.2ꢀ 0.2ꢀ 48 36-75 80 3.82
88ꢀ 90ꢀ 1.45x2.3x0.40 36.8x58.4x10.2 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.
PART NUMBER STRUCTURE
HPQ - 3.3 / 50 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 quantity order
Family
Series:
High Power
Pin length option
Blank = standard pin length 0.180 in. (4.6 mm)
L1 = 0.110 in. (2.79 mm)*
Quarter Brick
Nominal Output Voltage
L2 = 0.145 in. (3.68 mm)*
*Special quantity order is required;
no sample quantities available.
Conformal coating (optional)
Maximum Rated Output :
Current in Amps
Blank = no coating, standard
H = Coating added, optional, special quantity order
Input Voltage Range:
D48 = 36-75 Volts (48V nominal)
Baseplate (optional)
Blank = No baseplate, standard
B = Baseplate installed, optional quantity order
Note:
On/Off Control Polarity
Some model number combinations
may not be available. Please contact
Murata Power Solutions.
N = Negative polarity, standard
P = Positive polarity, optional
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MDC_HPQ-3.3/50-D48 Series.B01 Page 2 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
FUNCTIONAL SPECIFICATIONS ➀
Absolute Maximum Ratings
Input Voltage
Continuous
75 Volts max.
100 Volts max.
Transient, 100 mS max.
Output Power
166.6 Watts max.
On/Off Control
0V. min. to +15 V. max.
None. Install external fuse.
Input Reverse Polarity Protection
Current-limited.
Devices can withstand sustained short circuit without damage.
Output Current
Storage Temperature
Lead Temperature
-55 to +125 °C
See soldering guidelines.
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 nor recommended.
All specifications are typical unless noted. See Note 1.
Input
Input Voltage Range
See Ordering Guide.
10 Amps fast blow
33.0 Volts
Recommended External Fuse
Start-Up Voltage
Undervoltage Shutdown
Overvoltage Shutdown
Reflected (Back) Ripple Current (Note 2)
Internal Input Filter Type
Reverse Polarity Protection (Note 15)
Input Current:
32.0 Volts
None, see application notes.
20 mA pk-pk
Pi-type
None. Install external fuse.
Full Load Conditions
See Ordering Guide.
0.05 A2Sec.
10 mA
Inrush Transient
Shutdown Mode (Off, UV, OT)
Output Short Circuit
50 mA
No Load, 3.3Vout
80 mA
Low Line (Vin=Vmin, 3.3Vout)
Remote On/Off Control (Note 5)
5.21 Amps
ON = +2.5 V. to +15 V. max. or open pin
OFF = 0 to +1 V. max. or ground pin
Positive Logic (“P” suffix)
ON = -0.1 V. to +0.8 V. max. or ground pin
OFF = +2.5 V. to +15 V. max. or open pin
Negative Logic (“N” suffix)
Current
1 mA
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MDC_HPQ-3.3/50-D48 Series.B01 Page 3 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
Output
Minimum Loading
No minimum load
166.6 Watts
Maximum Output Power
Accuracy (50ꢀ load)
1 ꢀ of Vsetting. See note 16.
4 Volts
Overvoltage Protection (Note 7)
Temperature Coefficient
Ripple/Noise (20 MHz bandwidth)
Line/Load Regulation (See Tech. Notes)
Efficiency
0.02ꢀ per °C. of Vout range
See Ordering Guide and note 8.
See Ordering Guide and note 10.
See Ordering Guide
Remote Sense Compensation
Maximum Capacitive Loading, low ESR
Current Limit Inception (98ꢀ of Vout setting)
Short Circuit Mode (Notes 6, 12)
Short Circuit Current Output
Protection Method
+10ꢀ max. deviation from output
10,000 μF max. See note 11.
59 Amps (after warm up) See note 12.
5 Amps
Hiccup autorecovery upon overload removal. (See note 12)
Continuous, no damage (output shorted to ground)
Short Circuit Duration
Isolation
Isolation Voltage
Input to Output
2250 Vdc min.
1500 Vdc min.
1500 Vdc min.
10 Megohms
1000 pF
Input to Baseplate
Baseplate to Output
Isolation Resistance
Isolation Capacitance
Isolation Safety Rating
Basic insulation
Dynamic Characteristics
Dynamic Load Response (see note 1)
Turn-On Time
200 μSec to within 1ꢀ of final value. (50-75-50ꢀ load step)
10 mSec for Vout regulated
Remote On/Off Time
10 mSec for Vout regulated
Switching Frequency
400 40 ꢁHz
Environmental
Calculated MTBF (Note 4)
Operating Temperature Range (no baseplate)
Maximum Baseplate Operating Temperature
Storage Temperature Range
TBC
-40 to +85 °C (with derating)
+100 °C
-55 to +125 °C
Thermal Protection/Shutdown
(Case temp. is measured in the center)
+115 °C
Relative Humidity
Physical
85ꢀ/+85 °C
Outline Dimensions
Weight (without baseplate)
See Mechanical Specifications
1.06 ounces (30 grams)
Electromagnetic Interference
(may require external filter)
Meets EN55022, CISPR22, Class B,
conducted and radiated
Meets UL/cUL 60950-1
CSA-C22.2 No. 60950-1
IEC/EN 60950-1, 2nd Edition
Safety
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MDC_HPQ-3.3/50-D48 Series.B01 Page 4 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
Specification Notes
(1) All models are tested and specified with external 1||10 μF output capacitors and no external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equip-
ment and may not be required to achieve specified performance in your applications. All models are stable and regulate within spec under no-load conditions.
All specifications are typical unless noted. General conditions for Specifications are +25 °C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under power.
(2) Reflected Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=33 μF, 100V, Cbus=220 μF, 100V electrolytic, Lbus=12 μH.
(3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher temperatures and/or lower airflow, the DC-DC converter will tolerate brief full current outputs if the
total RMS current over time does not exceed the Derating curve. All Derating curves are presented at sea level altitude. Be aware of reduced power dissipation with increasing density altitude.
(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed conditions, Tpcboard=+25 °C, full output load, natural air convection.
(5) The On/Off Control is normally controlled by a switch, relay or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are
referenced to Input Common.
(6) Short circuit shutdown begins when the output voltage degrades approximately 2ꢀ from the selected setting.
(7) The output is not intended to sink appreciable reverse current. This may damage the outputs.
(8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction.
(9) All models are fully operational and meet published specifications, including “cold start” at –40 °C. Maximum power requires that the package temperature of all on-board components must never exceed
+128°C.
(10) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme.
(11) The converter is normally specified with the Input/Output filtering listed in Note 1. Higher capacitive load will reduce noise but at the expense of delayed settling time, extended turn-on time and slower tran-
sient response. Use only as much output filtering as needed and no more. Thoroughly test your system under full load with all components installed. Low ESR capacitors with high capacitance may degrade
dynamic performance.
(12) “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again.
This short current repeating pulse prevents overheating and damaging the converter. Output current limit and short circuit protection is non-latching. Once the fault is removed, the converter immediately
recovers normal operation.
(13) Do not exceed maximum power specifications when adjusting the output trim.
(14) At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load.
(15) Input Fusing: To ensure reverse input protection, always connect an external input fast-blow fuse in series with the +Vin input.
(16) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use 1ꢀ or better tolerance metal-film resistors.
(17.) 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.
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MDC_HPQ-3.3/50-D48 Series.B01 Page 5 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
TYPICAL PERFORMANCE DATA
Efficiency vs Line Voltage and Load Current @ +25°C
Maximum Current Temperature Derating
(Vin=48V, no baseplate, longitudinal air flow)
95
90
85
80
75
70
65
24
22
20
18
16
14
12
10
8
50
45
40
V
V
V
IN = 75 V
IN = 48 V
IN = 36 V
35
30
25
20
15
10
100 LFM
200 LFM
300 LFM
400 LFM
Power Dissipation
IN = 48 V
6
V
4
2
5
10
15
20
25
30
35
40
45
50
Load Current (Amps)
30
40
50
60
70
80
Ambient Temperature (°C)
Maximum Current Temperature Derating
(Vin=48V, with baseplate, longitudinal air flow)
60
50
40
30
20
10
0
100 LFM
200 LFM
300 LFM
400 LFM
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (°C)
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MDC_HPQ-3.3/50-D48 Series.B01 Page 6 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
TYPICAL PERFORMANCE DATA
Transient Response
Transient Response (25ꢀ Load Step)
Enable Start-up
Transient Response (50ꢀ Load Step)
Enable Start-up (Vin=48V Iout=50A)
Enable Start-up (Vin=48V Iout=0A)
Ripple and Noise (1uF Ceramic plus 10uF Tantalum)
Ripple Waveform (Vin=48V Iout=50A)
Ripple Waveform (Vin=48V Iout=0A)
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MDC_HPQ-3.3/50-D48 Series.B01 Page 7 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
MECHANICAL SPECIFICATIONS
1.860 (47.2)
A
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
1.00
1.45
(25.4)
(36.8)
Screw length
must not
go through
baseplate.
Tolerances (unless otherwise specified):
.XX 0.02 (0.5)
.XXX 0.010 (0.25)
Angles 2ꢂ
Components are shown for reference only.
BASEPLATE
#M3-THREAD X 0.15 DEEP
TYPICAL (4) PLACES
Optional baseplate
0.50 (12.7)
With Baseplate
0.40 (10.2)
Without Baseplate
0.015 (0.4)
min. clearance
between highest
component and
pin shoulders
0.18
(4.6)
PINS 1-3, 5-7: 0.040 0.001 (1.016 0.025)
PINS 4 & 8: 0.060 0.001 (1.52 0.025)
Component locations
are typical and may
DOSA-Compliant I/O Connections (pin side view)
Pin
1
Function P32
Pin
5
Function P32
–Sense
Trim
vary between models.
2.30 (58.4)
2.00 (50.8)
A
+Vin
Remote On/Off Control
–Vin
A
2
6
3
7
+Sense
+Vout
4
–Vout
8
Important! Always connect the sense pins. If they are not con-
nected to a remote load, wire each sense pin to its respective
voltage output at the converter pins.
3
2
1
4
5
6
7
8
0.600 (15.2)
4 EQ. SP.
@ 0.150 (3.8)
1.30
(33.0)
Standard pin length is shown. Please refer to the part number
structure for alternate pin lengths.
Optional mounting
holes, 4 places
2.15 (54.6)
BOTTOM VIEW
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MDC_HPQ-3.3/50-D48 Series.B01 Page 8 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
Start-Up Threshold and Undervoltage Shutdown
TECHNICAL NOTES
Under normal start-up conditions, these converters will not begin to regulate
properly until the ramping input voltage exceeds the Start-Up Threshold. Once
operating, devices will turn off when the applied voltage drops below the Und-
ervoltage Shutdown point. Devices will remain off as long as the undervoltage
condition continues. Units will automatically re-start when the applied voltage
is brought back above the Start-Up Threshold. The hysteresis built into this
function avoids an indeterminate on/off condition at a single input voltage. See
Performance/Functional Specifications table for actual limits.
Removal of Soldered Converters from Printed Circuit Boards
Should removal of the converter from its soldered connection be needed,
thoroughly de-solder the pins using solder wicks or de-soldering tools. At no
time should any prying or leverage be used to remove converters that have not
been properly de-soldered first.
Input Source Impedance
These converters must be driven from a low ac-impedance input source. The
DC-DC’s performance and stability can be compromised by the use of highly
inductive source impedances. The input circuit shown in Figure 2 is a practical
solution that can be used to minimize the effects of inductance in the input
traces. For optimum performance, components should be mounted close to the
DC-DC converter.
Start-Up Time
The VIN to VOUT Start-Up Time is the interval between the point at which a
ramping input voltage crosses the Start-Up Threshold voltage and the point at
which the fully loaded output voltage enters and remains within its specified
regulation band. Actual measured times will vary with input source imped-
ance, external input capacitance, and the slew rate and final value of the input
voltage as it appears to the converter. The On/Off to VOUT start-up time assumes
that the converter is turned off via the Remote On/Off Control with the nominal
input voltage already applied.
I/O Filtering, Input Ripple Current, and Output Noise
All models in this Series are tested/specified for input ripple current (also called
input reflected ripple current) and output noise using the circuits and layout
shown in Figures 2 and 3. External input capacitors (CIN in Figure 2) serve
primarily as energy-storage elements.
On/Off Control
The primary-side, Remote On/Off Control function can be specified to operate
with either positive or negative polarity. Positive-polarity devices ("P" suffix)
are enabled when the on/off pin is left open or is pulled high. Positive-polarity
devices are disabled when the on/off pin is pulled low (with respect to –Input).
Negative-polarity devices are off when the on/off pin is high and on when the
on/off pin is pulled low. See Figure 4.
They should be selected for bulk capacitance (at appropriate frequencies),
low ESR, and high rms-ripple-current ratings. The switching nature of DC-DC
converters requires that dc voltage sources have low ac impedance as highly
inductive source impedance can affect system stability. In Figure 2, CBUS and
LBUS simulate a typical dc voltage bus. Your specific system configuration may
necessitate additional considerations.
Dynamic control of the remote on/off function is best accomplished with a me-
chanical relay or an open-collector/open-drain drive circuit (optically isolated if
appropriate). The drive circuit should be able to sink appropriate current (see
Performance Specifications) when activated and withstand appropriate voltage
when deactivated.
In critical applications, output ripple and noise (also referred to as periodic and
random deviations or PARD) may be reduced by adding filter elements such
as multiple external capacitors. Be sure to calculate component temperature
rise from reflected AC current dissipated inside capacitor ESR.All external
capacitors should have appropriate voltage ratings and be located as close to
the converter as possible. Temperature variations for all relevant parameters
should be taken into consideration.
The most effective combination of external I/O capacitors will be a function
of line voltage and source impedance, as well as particular load and layout
conditions.
TO
CURRENT
PROBE
OSCILLOSCOPE
7
+SENSE
1
3
8
+VIN
–VIN
+VOUT
L
BUS
+
RLOAD
SCOPE
C1
C2
VIN
C
BUS
CIN
–
4
5
–VOUT
–SENSE
See specs for component values.
C1 = 1μF
Figure 2. Measuring Input Ripple Current
C2 = 10μF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
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MDC_HPQ-3.3/50-D48 Series.B01 Page 9 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
Sense Input
temperature (See Performance Specifications), a precision temperature sensor
will power down the unit. When the internal temperature decreases below the
threshold of the temperature sensor, the unit will self start.
Note: The sense and VOUT lines are internally connected through low-value re-
sistors. Nevertheless, if sense is not used for remote regulation, the user must
connect + sense to + VOUT and -sense to -VOUT at the converter pins. Sense is
intended to correct small output accuracy errors caused by the resistive ohmic
drop in output wiring as output current increases. This output drop (the differ-
ence between Sense and VOUT when measured at the converter) should not be
allowed to exceed 0.5V.
Output Overvoltage Protection
The output voltage is monitored for an overvoltage condition via magnetic coupling
to the primary side. If the output voltage rises to a fault condition, which could be
damaging to the load circuitry (see Performance Specifications), the sensing cir-
cuitry will power down the PWM controller causing the output voltage to decrease.
Following a time-out period the PWM will restart, causing the output voltage to
ramp to its appropriate value. If the fault condition persists, and the output volt-
ages again climb to excessive levels, the overvoltage circuitry will initiate another
shutdown cycle. This on/off cycling is referred to as “hiccup” mode.
Sense is connected at the load and corrects for resistive errors only. Be careful
where it is connected. Any long, distributed wiring and/or significant inductance
introduced into the Sense control loop can adversely affect overall system stabil-
ity. If in doubt, test the application, and observe the DC-DC’s output transient
response during step loads. There should be no appreciable ringing or oscilla-
tion. You may also adjust the output trim slightly to compensate for voltage loss
in any external filter elements. Do not exceed maximum power ratings.
Input Reverse-Polarity Protection
If the input-voltage polarity is accidentally reversed, an internal diode will be-
come forward biased and likely draw excessive current from the power source.
If the source is not current limited or the circuit appropriately fused, it could
cause permanent damage to the converter.
Current Limiting
When power demands from the output falls within the current limit inception
range for the rated output current, the DC-DC converter will go into a current
limiting mode. In this condition the output voltage will decrease proportionately
with increases in output current, thereby maintaining a somewhat constant power
dissipation. This is commonly referred to as power limiting. Current limit inception
is defined as the point where the full-power output voltage falls below the specified
tolerance. If the load current being drawn from the converter is significant enough,
the unit will go into a short circuit condition. See “Short Circuit Condition.”
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of a sustained, non-current-limited, input-voltage polarity
reversal exists. For these converters, fast-blow fuses are recommended with
values no greater than twice the maximum input current.
Short Circuit Condition
Trimming Output Voltage
When a converter is in current limit mode the output voltages will drop as the
output current demand increases. If the output voltage drops too low, the mag-
netically coupled voltage used to develop primary side voltages will also drop,
thereby shutting down the PWM controller. Following the specified time-out
period, the PWM will restart, causing the output voltages to begin ramping to their
appropriate values. If the short-circuit condition persists, another shutdown
cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The
hiccup cycling reduces the average output current, thereby preventing internal
temperatures from rising to excessive levels. This converter is capable of
enduring an indefinite short circuit output condition.
These converters have a trim capability that enables users to adjust the output
voltage over a limited range (refer to the trim equations). Adjustments to the out-
put voltage can be accomplished with a single fixed resistor as shown in Figures
5 and 6. A single fixed resistor can increase or decrease the output voltage
depending on its connection. Resistors should be located close to the converter
and have TCR’s less than 100ppm/°C to minimize sensitivity to changes in
temperature. If the trim function is not used, leave the trim pin open.
On standard units, a single resistor connected from the Trim pin to the +Sense
will increase the output voltage. A resistor connected from the Trim Pin to the
–Sense will decrease the output voltage.
Thermal Shutdown
Trim adjustments greater than the specified trim range can have an adverse
affect on the converter’s performance and are not recommended. Excessive
voltage differences between VOUT and Sense, in conjunction with trim adjust-
ment of the output voltage, can cause the overvoltage protection circuitry to
activate (see Performance Specifications for overvoltage limits).
These converters are equipped with thermal-shutdown circuitry. If the internal
temperature of the DC-DC converter rises above the designed operating
EQUIVALENT CIRCUIT FOR
POSITIVE AND NEGATIVE
LOGIC MODELS
+Vcc
+VIN
1
2
Temperature/power derating is based on maximum output current and voltage
at the converter’s output pins. Use of the trim and sense functions can cause
output voltages to increase, thereby increasing output power beyond the
converter’s specified rating, or cause output voltages to climb into the output
overvoltage region. Therefore:
ON/OFF
CONTROL
CONTROL
(VOUT at pins) x (IOUT) rated output power
REF
3
–VIN
COMMON
The Trim pin is a relatively high impedance node that can be susceptible to
noise pickup when connected to long conductors in noisy environments.
Figure 4. Driving the Remote On/Off Control Pin
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MDC_HPQ-3.3/50-D48 Series.B01 Page 10 of 11
HPQ-3.3/50-D48 Series
Isolated High Power Quarter Brick DC-DC Converters
+VOUT
+VIN
+VOUT
+SENSE
TRIM
+VIN
+SENSE
ON/OFF
CONTROL
ON/OFF
CONTROL
TRIM
–SENSE
–VOUT
LOAD
LOAD
RTRIM DOWN
RTRIM UP
–SENSE
–VOUT
–VIN
–VIN
Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors
Trim Down
Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors
Trim Up
HPQ-3.3/50-D48
16.863(1+∆)
5.11
5.11
–
–10.22
–10.22
RTUP (k7) =
RTDOWN (k7) =
1.225x∆
∆
∆
where ∆ is the absolute value of
( 3.3 - VOUT
)
3.3
(∆ is always positive)
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)
For Sn/Ag/Cu based solders:
For Sn/Pb based solders:
Maximum Preheat Temperature 115° C.
Maximum Preheat Temperature 105° C.
Maximum Pot Temperature
Maximum Solder Dwell Time
270° C.
Maximum Pot Temperature
250° C.
7 seconds Maximum Solder Dwell Time
6 seconds
NOTICE—Please use only this customer data sheet as product documentation
when laying out your printed circuit boards and applying this product into your
application. Do NOT use other materials as official documentation such as adver-
tisements, product announcements, or website graphics.
The pinout (Pxx) and case (Cxx) designations (typically P65 or C59) refer to
a generic family of closely related information. It may not be a single pinout
or unique case outline. Please be aware of small details (such as Sense pins,
Power Good pins, etc.) or slightly different dimensions (baseplates, heat
sinks, etc.) which may affect your application and PC board layouts. Study the
Mechanical Outline drawings, Input/Output Connection table and all footnotes
very carefully. Please contact Murata Power Solutions if you have any ques-
tions.
We strive to have all technical data in this customer data sheet highly accurate
and complete. This customer data sheet is revision-controlled and dated. The
latest customer data sheet revision is normally on our website (www.murata-
ps.com) for products which are fully released to Manufacturing. Please be
especially careful using any data sheets labeled “Preliminary” since data may
change without notice.
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2013 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_HPQ-3.3/50-D48 Series.B01 Page 11 of 11
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