Murata HPH-3.3/70-D48NY Isolated, low vout to 70a, half-brick dc/dc converter Datasheet

HPH Series
www.murata-ps.com
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
Murata Power Solutions’ fully isolated HPH series of DC/DC converters affords users a
practical solution for their low-voltage/high-current applications. With an input voltage range of
36 to 75 Volts, the HPH Series delivers up to 70 Amps of output current from a fully regulated
3.3V output.
Typical unit
FEATURES
„
RoHS Compliant
„
3.3V to 12V outputs @ up to 70 Amps
„
Input range: 36V-75V
„
Open Frame: 2.3" x 2.4" x 0.40"
„
Industry-standard package/pinout
„
Remote sense, Trim, On/Off control
„
High efficiency: up to 91%
„
Fully isolated, 2250Vdc (BASIC)
PRODUCT OVERVIEW
Using both surface-mount technology
and planar magnetics, these converters
are manufactured on a 2.3" x 2.4", leadfree, open-frame package with an industrystandard pinout.
HPH converters utilize a full-bridge,
fixed-frequency topology along with synchronous output rectification to achieve a
high efficiency. This efficiency, coupled with
the open-frame package that allows unrestricted air flow, reduces internal component
temperatures thereby allowing operation at
elevated ambient temperatures.
These DC/DC’s provide output trim,
sense pins and primary side on/off control (available with positive or negative
logic). Standard features also include input
undervoltage shutdown circuitry, output
overvoltage protection, output short-circuit
and current limiting protection and thermal shutdown. All devices meet IEC/UL/
EN60950-1 safety standards and carry the
CE mark (meet LVD requirements).
„
Input undervoltage shutdown
„
Output overvoltage protection
„
Short circuit protection, thermal shutdown
„
Designed to meet UL/EN/IEC 60950-1, CAN/
CSA-C22.2 No. 60950-1 safety approvals
SIMPLIFIED SCHEMATIC
+SENSE
(6)
+Vin
(4)
+Vout
(5)
„
CE mark
„
Optional baseplate offers increased thermal
performance
SWITCH
CONTROL
-Vout
(9)
+Vin
(1)
PULSE
TRANSFORMER
PWM
CONTROLLER
REMOTE
ON /OFF
CONTROL*
(3)
OPTO
ISOLATION
Input undervoltage, input
overvoltage, and output
overvoltage comparators
REFERENCE &
ERROR AMP
-SENSE
(8)
Vout
TRIM
(7)
* Can be ordered with positive (standard) or negative (optional) polarity.
Typical topology is shown. Some models may vary slightly.
For full details go to
www.murata-ps.com/rohs
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Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPH_A12 Page 1 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE
Output
Input
Efficiency
(Watts)
HPH-1.5/80-D48N-C
1.5
80
120
HPH-1.8/80-D48N-C
1.8
80
144
HPH-2.5/80-D48N-C
2.5
80
200
HPH-3.3/70-D48N-C
3.3
70 f
231
100
125
±0.25% ±0.25%
48
36-75
70
5.35
88%
90%
C61
P17
HPH-5/40-D48N-C
5
40
200
100
125
±0.25% ±0.25%
48
36-75
70
4.58
90%
91%
C61
P17
HPH-12/30-D48N-C
12
30 f
360
100
200
±0.05%
48
36-75
150
8.06
92%
93%
C61
P17
Root Model M
M
N
O
f
Power
R/N (mV pk-pk)
Typ.
Max.
Regulation (Max.)
Line
Load
VIN Nom.
(Volts)
Range
(Volts)
IIN, no
load
(mA)
IIN, full
load
(Amps)
Package
VOUT
(Volts)
IOUT
(Amps,
Max.)
Min.
Typ.
(Case/
Pinout)
Please contact Murata Power Solutions for further information. N
±0.1%
Please refer to the full model number structure for additional ordering part numbers and options.
Contact Murata Power Solutions for availability.
All specifications are at nominal line voltage and full load, +25ºC. unless otherwise noted. See detailed specifications.
Full power continuous output requires baseplate installation. Please refer to the derating curves.
PART NUMBER STRUCTURE
HPH - 3.3 / 70 - D48 N B
Unipolar
High-Power Series
Nominal Output Voltage
Maximum 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
H LX - C
RoHS Hazardous Materials compliance
C = RoHS-6 (no lead), 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
Conformal coating (optional)
Blank = no coating, standard
H = Coating added, optional, special quantity order
Baseplate (optional)
Blank = No baseplate, standard
B = Baseplate installed, optional quantity order
Note: Some model combinations may not be
available. Contact Murata Power Solutions for
availability.
Note: Because of the high currents, wire the appropriate input, output and common pins in parallel. Be sure to use adequate PC board etch. If not sufficient, install additional discrete wiring.
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MDC_HPH_A12 Page 2 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
INPUT CHARACTERISTICS
Model Family
Start-up
UnInput Current 1
threshold dervolt- Reflected
age (back) Ripple Inrush Output
No
Low
Current
ShutTyp.
Tran- Short
Load Line
down12
sient Circuit
mA
mA
A
V
V
mA pk-pk A2sec
Remote On/Off Control 6
Reverse
Internal
Polarity Current
Standby Input
16
Mode Filter Type Protection (Max.)
mA
HPH-3.3/70-D48
35
33.5
20
0.1
50
70
7.13
1
HPH-5/40-D48
35
33.5
20
0.05
50
70
6.11
4
HPH-12/30-D48
34
32
60
0.3
50
150
10.8
4
Pi-type
See notes
Positive Logic
Negative Logic
mA
“P” model suffix
“N” model suffix
2
OFF=Gnd. pin to
+1V Max.
ON=open pin or
+3.5 to +15V
Max.
OFF=open pin or
+3.5V to +15V
Max.
ON=Gnd. pin to
+1V Max.
OFF=Gnd. pin to
+1V Max.
ON=open pin or
+3.5 to +13.5V
Max.
OFF=open pin or
+3.5V to +13.5V
Max.
ON=Gnd. pin to
+1V Max.
2
2
OUTPUT CHARACTERISTICS
VOUT
Accuracy
Adjustment Temperature Capacitance Overvoltage
Range 8
Coefficient
Loading
Protection 10 15
Model Family
50% Load
HPH-3.3/70-D48
HPH-5/40-D48
HPH-12/30-D48
% of
VNOM
% of VNOM
±1
±1
±1
±10
±10
±10
% of VOUT
range/ºC
±0.02
±0.02
±0.02
OverVoltage
Low ESR <0.02 Hiccup auto Protection
Max., resistive restart after Method
fault removal
load
μF
V
10,000
4
Magnetic
10,000
6
feedback
10,000
14.5
Ripple/
Noise 9
Remote Sense
Compensation 11
Minimum
Loading
Max.
(20 MHz
bandwidth)
Line/Load Efficiency
Regulation 7
% of VOUT
+10
No
minimum
load
See ordering guide
ISOLATION CHARACTERISTICS
Model Family
Input to
Output
Input
to baseplate
Min.
V
Min.
V
Baseplate
to output
Min.
V
2250
1500
1500
HPH-3.3/70-D48
HPH-5/40-D48
HPH-12/30-D48
Isolation
Resistance
Isolation
Capacitance
MΩ
pF
100
2000
Isolation
Safety
Rating
Basic
Insulation
Short Circuit
Short Circuit
Current
Protection
Method
98% of VOUT, after warmup
Continuous
A
A
84
12
Current
limiting,
45
TBD
hiccup
autorestart
37
TBD
Current Limit Inception
See notes on page 4.
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). 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
270° C.
Maximum Pot Temperature
250° C.
Maximum Solder Dwell Time
7 seconds
Maximum Solder Dwell Time
6 seconds
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MDC_HPH_A12 Page 3 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
DYNAMIC CHARACTERISTICS
Dynamic Load Response, μSec to ±1% final value, (50-75-50%, load step)
Start-up Time, VIN to VOUT
Remote On/Off to VOUT regulated (Max.)
Switching Frequency
HPH-3.3/70-D48
HPH-5/40-D48, HPH-12/30-D48
HPH-3.3/70-D48, HPH-5/40-D48
HPH-12/30-D48
HPH-3.3/70-D48, HPH-5/40-D48
HPH-12/30-D48
HPH-3.3/70-D48
HPH-5/40-D48
HPH-12/30-D48
Calculated MTBF
Operating Temperature Range
Storage Temperature Range
Thermal Protection/Shutdown
Relative Humidity
Pre-biased Startup
150μS
200μS
50 mS max.
15 mS max.
50 mS max.
15 mS max.
450 KHz
440 KHz
440 KHz
1.2 M hours (HPH-12/30-D48)
-40 to +85ºC, see derating curves
-55 to +125ºC
120ºC
To +85ºC/85%, non condensing
VOUT must be ≤ VSET
PHYSICAL CHARACTERISTICS
Outline Dimensions
Baseplate Material
Pin Material
Pin Diameter
Pin Finish
See mechanical specs
Aluminum
Copper alloy
0.04/0.08" (1.016/2.032mm)
Nickel underplate with gold overplate
HPH-12/30-D48: 2.25 ounces (63.8g)
All other models: 2 ounces (56.7g)
Designed to meet FCC part 15, class B, EN55022
Designed to meet UL/cUL 60950-1,
CSA-C22.2 No.60950-1, IEC/EN 60950-1
Weight
Electromagnetic Interference (conducted and radiated) (may require external filter)
Safety
ABSOLUTE MAXIMUM RATINGS
Volts, Min.
Volts, Max. Continuous
Volts, Min.
Volts, Max.
Input Voltage
On/Off Control, referred to -VIN
Input Reverse Polarity Protection
Output Overvoltage, Max.
Storage Temperature
Min.
Max.
[1] All specifications are typical unless noted. Ambient temperature = +25 degrees Celsius, Vin is
nominal (+48 Volts), output current is maximum rated nominal. Output capacitance is 1 μF ceramic
paralleled with 10 μF electrolytic. Input caps are 22 μF except HPH-3.3/70-D48 which is 100 μF input.
All caps are low ESR. These capacitors are necessary for our test equipment and may not be needed
in your application.
Testing must be kept short enough that the converter does not appreciably heat up during testing. For
extended testing, use plenty of airflow. See Derating Curves for temperature performance. All models
are stable and regulate within spec without external cacacitance.
[2] Input Ripple Current is tested and specified over a 5-20 MHz bandwidth and uses a special set of
external filters only for the Ripple Current specifications. Input filtering is Cin = 33 μF, Cbus = 220 μF,
Lbus = 12 μH except HPH-3.3/70-D48 is Cin = 100μF. Use capacitor rated voltages which are twice
the maximum expected voltage. Capacitors must accept high speed AC switching currents.
-0.3V
75V (100V/100mS, HPH-12/30-D48)
-0.3V
50V
See fuse section
VOUT + 20%
-55ºC
125ºC
[7] Regulation specifications describe the deviation as the input line voltage or output load current is
varied from a nominal midpoint value to either extreme.
[8] Do not exceed maximum power ratings, Sense limits or output overvoltage when adjusting output
trim values.
[9] At zero output current, Vout may contain components which slightly exceed the ripple and noise
specifications.
[10] Output overload protection is non-latching. When the output overload is removed, the output will
automatically recover.
[11] Because of the high currents, wire the appropriate input, output and common pins in parallel
groups. Be sure to use adequate PC board etch. If not sufficient, install additional discrete wiring. If
wiring is not sufficient, the Sense feedback may attempt to drive the outputs beyond ratings.
[3] Note that Maximum Current Derating Curves indicate an average current at nominal input voltage.
At higher temperatures and/or lower airflow, the converter will tolerate brief full current outputs if the
total RMS current over time does not exceed the Derating curve.
[12] The converter will shut off if the input falls below the undervoltage threshold. It will not restart
until the input exceeds the Input Start Up Voltage.
[4] Mean Time Before Failure (MTBF) is calculated using the Telcordia (Belcore) SR-332 Method 1,
Case 3, ground fixed conditions. TPCBOARD = +25 °C., full output load, natural air convection.
[14] Output noise may be further reduced by installing an external filter. See the Application Notes.
[5] The output may be shorted to ground indefinitely with no damage.
[16] To protect against accidental input voltage polarity reversal, install a fuse in series with +Vin. See
Fusing information.
6] The On/Off Control is normally driven from a switch or relay. An open collector/open drain transistor
may be used in saturation and cut-off (pinch-off) modes. External logic may also be used if voltage
levels are fully compliant to the specifications.
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[13] Please refer to the separate output capacitive load application note from Murata Power Solutions.
[15] To avoid damage or unplanned shutdown, avoid sinking reverse output current.
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MDC_HPH_A12 Page 4 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
APPLICATION NOTES
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs of
power conversion components. Fuses should also be used when there is the
possibility of sustained input voltage reversal which is not current-limited. We
recommend a time delay fuse installed in the ungrounded input supply line with
a value which is approximately twice the maximum line current, calculated at
the lowest input voltage.
The installer must observe all relevant safety standards and regulations. For
safety agency approvals, install the converter in compliance with the end-user
safety standard, i.e. IEC/EN/UL 60950-1.
Input Reverse-Polarity Protection
If the input voltage polarity is reversed, an internal diode will become forward
biased and likely draw excessive current from the power source. If this source
is not current-limited or the circuit appropriately fused, it could cause permanent damage to the converter.
Input Under-Voltage Shutdown and Start-Up Threshold
Under normal start-up conditions, converters will not begin to regulate properly
until the ramping-up input voltage exceeds and remains at the Start-Up
Threshold Voltage (see Specifications). Once operating, converters will not
turn off until the input voltage drops below the Under-Voltage Shutdown Limit.
Subsequent restart will not occur until the input voltage rises again above the
Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a single input voltage.
Users should be aware however of input sources near the Under-Voltage Shutdown whose voltage decays as input current is consumed (such as capacitor
inputs), the converter shuts off and then restarts as the external capacitor
recharges. Such situations could oscillate. To prevent this, make sure the operating input voltage is well above the UV Shutdown voltage AT ALL TIMES.
Start-Up Time
Assuming that the output current is set at the rated maximum, the Vin to Vout
Start-Up Time (see Specifications) is the time interval between the point when
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
regulated output voltage enters and remains within its specified accuracy band.
Actual measured times will vary with input source impedance, external input
capacitance, input voltage slew rate and final value of the input voltage as it
appears at the converter.
These converters include a soft start circuit to moderate the duty cycle of its
PWM controller at power up, thereby limiting the input inrush current.
The On/Off Remote Control interval from On command to Vout regulated assumes that the converter already has its input voltage stabilized above the
Start-Up Threshold before the On command. The interval is measured from the
On command until the output enters and remains within its specified accuracy
band. The specification assumes that the output is fully loaded at maximum
rated current. Similar conditions apply to the On to Vout regulated specification
such as external load capacitance and soft start circuitry.
put voltage regulation. Since real-world voltage sources have finite impedance,
performance is improved by adding external filter components. Sometimes only
a small ceramic capacitor is sufficient. Since it is difficult to totally characterize
all applications, some experimentation may be needed. Note that external input
capacitors must accept high speed switching currents.
Because of the switching nature of DC/DC converters, the input of these
converters must be driven from a source with both low AC impedance and
adequate DC input regulation. Performance will degrade with increasing input
inductance. Excessive input inductance may inhibit operation. The DC input
regulation specifies that the input voltage, once operating, must never degrade
below the Shut-Down Threshold under all load conditions. Be sure to use
adequate trace sizes and mount components close to the converter.
I/O Filtering, Input Ripple Current and Output Noise
All models in this converter series are tested and specified for input reflected ripple current and output noise using designated external input/output components,
circuits and layout as shown in the figures below. External input capacitors (Cin
in the figure) serve primarily as energy storage elements, minimizing line voltage
variations caused by transient IR drops in the input conductors. Users should
select input capacitors for bulk capacitance (at appropriate frequencies), low
ESR and high RMS ripple current ratings. In the figure below, the Cbus and Lbus
components simulate a typical DC voltage bus. Your specific system configuration
may require additional considerations. Please note that the values of Cin, Lbus
and Cbus will vary according to the specific converter model.
TO
OSCILLOSCOPE
VIN
+
–
+
–
CURRENT
PROBE
4
+INPUT
LBUS
CBUS
CIN
1
-INPUT
CIN = 33μF, ESR < 700mΩ @ 100kHz
CBUS = 220μF, ESR < 100mΩ @ 100kHz
LBUS = 12μH
Figure 2. Measuring Input Ripple Current
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. Our Application
Engineers can recommend potential solutions.
In figure 3, the two copper strips simulate real-world printed circuit impedances between the power supply and its load. In order to minimize circuit errors
and standardize tests between units, scope measurements should be made
using BNC connectors or the probe ground should not exceed one half inch and
soldered directly to the fixture.
Input Source Impedance
These converters will operate to specifications without external components,
assuming that the source voltage has very low impedance and reasonable in-
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MDC_HPH_A12 Page 5 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
+SENSE
+OUTPUT
6
COPPER STRIP
5
C1
-OUTPUT
-SENSE
Note that the temperatures are of the ambient airflow, not the converter itself
which is obviously running at higher temperature than the outside air. Also note
that very low flow rates (below about 25 LFM) are similar to “natural convection”, that is, not using fan-forced airflow.
C2
SCOPE
RLOAD
9
8
COPPER STRIP
C1 = 0.1μF CERAMIC
C2 = 10μF TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3 – Measuring Output Ripple and Noise (PARD)
Floating Outputs
Since these are isolated DC/DC converters, their outputs are “floating” with
respect to their input. The essential feature of such isolation is ideal ZERO
CURRENT FLOW between input and output. Real-world converters however do
exhibit tiny leakage currents between input and output (see Specifications).
These leakages consist of both an AC stray capacitance coupling component
and a DC leakage resistance. When using the isolation feature, do not allow
the isolation voltage to exceed specifications. Otherwise the converter may
be damaged. Designers will normally use the negative output (-Output) as
the ground return of the load circuit. You can however use the positive output
(+Output) as the ground return to effectively reverse the output polarity.
Minimum Output Loading Requirements
These converters employ a synchronous rectifier design topology. All models
regulate within specification and are stable under no load to full load conditions. Operation under no load might however slightly increase output ripple
and noise.
Thermal Shutdown
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC/DC’s to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature sensor
will power down the unit. When the temperature decreases below the turn-on
threshold, the converter will automatically restart. There is a small amount of
hysteresis to prevent rapid on/off cycling. The temperature sensor is typically
located adjacent to the switching controller, approximately in the center of the
unit. See the Performance and Functional Specifications.
CAUTION: If you operate too close to the thermal limits, the converter may shut
down suddenly without warning. Be sure to thoroughly test your application to
avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in the next section illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable
under increasing forced airflow measured in Linear Feet per Minute (“LFM”).
Note that these are AVERAGE measurements. The converter will accept brief
increases in temperature and/or current or reduced airflow as long as the average is not exceeded.
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MPS makes Characterization measurements in a closed cycle wind tunnel with
calibrated airflow. We use both thermocouples and an infrared camera system
to observe thermal performance. As a practical matter, it is quite difficult to
insert an anemometer to precisely measure airflow in most applications.
Sometimes it is possible to estimate the effective airflow if you thoroughly understand the enclosure geometry, entry/exit orifice areas and the fan flowrate
specifications. If in doubt, contact MPS to discuss placement and measurement
techniques of suggested temperature sensors.
CAUTION: If you routinely or accidentally exceed these Derating guidelines, the
converter may have an unplanned Over Temperature shut down. Also, these
graphs are all collected at slightly above Sea Level altitude. Be sure to reduce
the derating for higher density altitude.
Output Overvoltage Protection
This converter monitors its output voltage for an over-voltage condition using
an on-board electronic comparator. The signal is optically coupled to the primary side PWM controller. If the output exceeds OVP limits, the sensing circuit
will power down the unit, and the output voltage will decrease. After a time-out
period, the PWM will automatically attempt to restart, causing the output voltage to ramp up to its rated value. It is not necessary to power down and reset
the converter for this automatic OVP-recovery restart.
If the fault condition persists and the output voltage climbs to excessive levels,
the OVP circuitry will initiate another shutdown cycle. This on/off cycling is
referred to as “hiccup” mode. It safely tests full current rated output voltage
without damaging the converter.
Output Fusing
The converter is extensively protected against current, voltage and temperature
extremes. However your output application circuit may need additional protection. In the extremely unlikely event of output circuit failure, excessive voltage
could be applied to your circuit. Consider using an appropriate fuse in series
with the output.
Output Current Limiting
As soon as the output current increases to approximately 125% to 150% of
its maximum rated value, the DC/DC converter will enter a current-limiting
mode. The output voltage will decrease proportionally with increases in output
current, thereby maintaining a somewhat constant power output. This is commonly referred to as power limiting.
Current limiting inception is defined as the point at which full power falls below
the rated tolerance. See the Performance/Functional Specifications. Note
particularly that the output current may briefly rise above its rated value. This
enhances reliability and continued operation of your application. If the output
current is too high, the converter will enter the short circuit condition.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as
the output current demand increases. If the output voltage drops too low, the
magnetically coupled voltage used to develop primary side voltages will also
drop, thereby shutting down the PWM controller. Following a time-out period,
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MDC_HPH_A12 Page 6 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
the PWM will restart, causing the output voltage to begin ramping up to its appropriate value. If the short-circuit condition persists, another shutdown cycle
will initiate. This on/off cycling is called “hiccup mode”. The hiccup cycling
reduces the average output current, thereby preventing excessive internal
temperatures. A short circuit can be tolerated indefinitely.
Remote Sense Input
Sense inputs compensate for output voltage inaccuracy delivered at the load.
This is done by correcting voltage drops along the output wiring such as moderate IR drops and the current carrying capacity of PC board etch. Sense inputs
also improve the stability of the converter and load system by optimizing the
control loop phase margin.
Note: The Sense input and power Vout lines are internally connected through
low value resistors to their respective polarities so that the converter can
operate without external connection to the Sense. Nevertheless, if the Sense
function is not used for remote regulation, the user should connect +Sense to
+Vout and –Sense to –Vout at the converter pins.
The remote Sense lines carry very little current. They are also capacitively
coupled to the output lines and therefore are in the feedback control loop to
regulate and stabilize the output. As such, they are not low impedance inputs
and must be treated with care in PC board layouts. Sense lines on the PCB
should run adjacent to DC signals, preferably Ground. In cables and discrete
wiring, use twisted pair, shielded tubing or similar techniques
Please observe Sense inputs tolerance to avoid improper operation:
a single fixed resistor connected between the Trim input and either the +Sense
or –Sense terminals. (On some converters, an external user-supplied precision
DC voltage may also be used for trimming). Trimming resistors should have a
low temperature coefficient (±100 ppm/deg.C or less) and be mounted close
to the converter. Keep leads short. If the trim function is not used, leave the
trim unconnected. With no trim, the converter will exhibit its specified output
voltage accuracy.
There are two CAUTION’s to be aware for the Trim input:
CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the
maximum output voltage OR the maximum output power when setting the trim.
Be particularly careful with a trimpot. If the output voltage is excessive, the
OVP circuit may inadvertantly shut down the converter. If the maximum power
is exceeded, the converter may enter current limiting. If the power is exceeded
for an extended period, the converter may overheat and encounter overtemperature shut down.
CAUTION: Be careful of external electrical noise. The Trim input is a senstive
input to the converter’s feedback control loop. Excessive electrical noise may
cause instability or oscillation. Keep external connections short to the Trim
input. Use shielding if needed. Also consider adding a small value ceramic
capacitor between the Trim and –Vout to bypass RF and electrical noise.
1
-INPUT
+OUTPUT
5
[Vout(+) –Vout(-)] – [ Sense(+) – Sense(-)] ≤ 10% of Vout
1
-INPUT
+OUTPUT
+SENSE
+SENSE
Contact and PCB resistance
losses due to IR drops
5
6
3
I OUT
ON/OFF
CONTROL
Sense Current
3
ON/OFF
CONTROL
TRIM
7
LOAD
4
-SENSE
+INPUT
8
7 5-22
TURNS
TRIM
-SENSE
Sense Return
6
-OUTPUT
LOAD
8
9
I OUT Return
4
+INPUT
-OUTPUT
Figure 5 – Trim adjustments using a trimpot
9
Contact and PCB resistance
losses due to IR drops
Figure 4 – Remote Sense Circuit Configuration
Output overvoltage protection is monitored at the output voltage pin, not the
Sense pin. Therefore excessive voltage differences between Vout and Sense
together with trim adjustment of the output can cause the overvoltage protection circuit to activate and shut down the output.
Trimming the Output Voltage
The Trim input to the converter allows the user to adjust the output voltage
over the rated trim range (please refer to the Specifications). In the trim equations and circuit diagrams that follow, trim adjustments use either a trimpot or
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5
-INPUT
6
+SENSE
3
Power derating of the converter is based on the combination of maximum output current and the highest output voltage. Therefore the designer must insure:
(Vout at pins) x (Iout) ≤ (Max. rated output power)
+OUTPUT
1
ON/OFF
CONTROL
TRIM
+INPUT
LOAD
R TRIM UP
-SENSE
4
7
-OUTPUT
8
9
Figure 6 – Trim adjustments to Increase Output Voltage using a Fixed Resistor
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MDC_HPH_A12 Page 7 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
1
+OUTPUT
Negative: Optional negative-polarity devices are on (enabled) when the On/Off
is grounded or brought to within a low voltage (see Specifications) with respect
to –Vin. The device is off (disabled) when the On/Off is left open or is pulled
high to +Vin with respect to –Vin.
5
-INPUT
6
+SENSE
3
ON/OFF
CONTROL
TRIM
LOAD
R TRIM DOWN
-SENSE
4
7
+INPUT
-OUTPUT
3
ON/OFF
CONTROL
9
Radj_up (in kΩ) = Vnominal x (1+Δ) - 1 - 2
1.225 x Δ
Δ
1
-INPUT
Figure 9 – Driving the Negative Polarity On/Off Control Pin
Vout -Vnominal
Vnominal
Dynamic control of the On/Off function should be able to sink appropriate signal current when brought low and withstand appropriate voltage when brought
high. Be aware too that there is a finite time in milliseconds (see Specifications)
between the time of On/Off Control activation and stable, regulated output. This
time will vary slightly with output load type and current and input conditions.
1
-2
Δ
Vnominal -Vout
Vnominal
Radj_down (in kΩ) =
where Δ =
+VCC
8
Figure 7 – Trim adjustments to Decrease Output Voltage using a Fixed Resistor
where Δ =
+INPUT
4
There are three CAUTION’s for the On/Off Control:
Trim Equations
Where Vref = +1.225 Volts and Δ is the desired output voltage change. Note
that "Δ" is given as a small fraction, not a percentage.
A single resistor connected between Trim and +Sense will increase the output
voltage. A resistor connected between Trim and –Sense will decrease the output.
Remote On/Off Control
On the input side, a remote On/Off Control can be ordered with either polarity.
Positive: Standard models are enabled when the On/Off pin is left open or is
pulled high to +Vin with respect to –Vin. An internal bias current causes the
open pin to rise to +Vin. Some models will also turn on at lower intermediate
voltages (see Specifications). Positive-polarity devices are disable when the
On/Off is grounded or brought to within a low voltage (see Specifications) with
respect to –Vin.
CAUTION: To retain full output circuit isolation, control the On/Off from the input
side ONLY. If you must control it from circuits in the output, use some form of
optoisolation to the On/Off Control. This latter condition is unlikely because the
device controlling the On/Off would have to remain powered on and not be
powered from the converter..
CAUTION: While it is possible to control the On/Off with external logic if you
carefully observe the voltage levels, the preferred circuit is either an open
drain/open collector transistor or a relay (which can thereupon be controlled by
logic). The On/Off prefers to be set at +Vin (open pin) for the ON state, assuming positive logic.
CAUTION: Do not apply voltages to the On/Off pin when there is no input power
voltage. Otherwise the converter may be permanently damaged.
+ Vcc
ON/OFF CONTROL
CONTROL
-INPUT
Figure 8 – Driving the Positive Polarity On/Off Control Pin
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MDC_HPH_A12 Page 8 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
Transient Response – Model HPH-3.3/70-D48
Figure 10 – Transient Response (25% Load Step)
Figure 11 – Transient Response (50% Load Step)
Enable Start-up – Model HPH-3.3/70-D48
Figure 12 – Enable Start-up (VIN=48V IOUT=0A)
Figure 13 – Enable Start-up (VIN=48V IOUT=70A)
Ripple and Noise (1uF Ceramic plus 10uF Tantalum) – Model HPH-3.3/70-D48
Figure 14 – Ripple Waveform (VIN=48V IOUT=0A)
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Figure 15 – Ripple Waveform (VIN=48V IOUT=70A)
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MDC_HPH_A12 Page 9 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
MECHANICAL SPECIFICATIONS
No Baseplate
With Optional Baseplate
2.30 (58.4)
Thermal surface (baseplate)
A
0.50
(12.7)
0.40
(10.2)
0.015 Min. clearance
between standoffs and
highest component.
1.900 (48.3)
Threaded insert M3-6H, typ. 4 places
diameter 0.126 (3.2). Do not disassemble.
A
0.188 (4.57)
0.500 (12.70)
2.000
(50.80)
0.600
(15.24)
7
3
6
4
5
2.400 (60.96)
8
1.400 (35.56)
2
0.700 (17.78)
9
0.400
(10.16)
1
0.400
(10.16)
1.000 (25.40)
0.500
(12.7)
1
9
2
8
7
3
6
0.400
(10.16)
4
5
#M3 x 0.50
thread through
(4 places)
B
1.900 (48.26)
B
A
Pin Side View
Hole Pattern (Baseplate Side View)
Dimensions are in inches (mm shown for ref. only).
Pins 1-4, 6-8:
Dia. 0.040±0.001 (1.016±0.025)
Pins 5,9:
Dia. 0.080±0.001 (2.032±0.025)
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
Pin
INPUT/OUTPUT CONNECTIONS
Function P17
Pin
Function P17
1
Minus Input
9
Minus Output
2
Case*
8
Minus Sense In
7
Trim In
3
On/Off control
6
Plus Sense In
4
Plus Input
5
Plus Output
Since there is some pinout inconsistency between manufacturers of half brick converters, be sure
to follow the pin function, not the pin number, when laying out your board.
* Note that the “case” connects to the baseplate (when installed). This case connection is isolated
from the rest of the converter. Pin 2 may be deleted under special order. Please contact Murata
Power Solutions for information.
The Trim connection may be left open and the converter will achieve its rated accuracy.
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MDC_HPH_A12 Page 10 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
Typical Performance Curves
HPH-3.3/70-D48
Efficiency and Power Dissipation Vs. Load Current @ +25ºC
HPH-3.3/70-D48 Maximum Current Temperature Derating
(VIN=48V, Airflow is from VIN to VOUT, no baseplate)
94
92
Output Current (Amps)
Efficiency (%)
90
VIN = 36 V
VIN = 50 V
VIN = 75 V
88
86
84
82
80
78
76
10
20
30
40
50
60
70
75
70
65
60
55
50
45
40
35
30
25
20
15
10
100 LFM
200 LFM
300 LFM
400 LFM
30
35
40
45
Load Current (Amps)
50
55
60
65
70
75
80
75
80
Ambient Temperature (ºC)
HPH-3.3/70-D48 Maximum Current Temperature Derating
(VIN=48V, Airflow is from VIN to VOUT, with baseplate)
80
70
Output Current (Amps)
60
50
40
30
100 LFM
200 LFM
300 LFM
400 LFM
20
10
0
30
35
40
45
50
55
60
65
70
75
80
Ambient Temperature (ºC)
HPH-5/40-D48 Maximum Current Temperature Derating
(VIN=48V, Airflow is from VIN to VOUT)
VIN = 75V
VIN = 48V
VIN = 36V
Power Dissipation @ VIN = 48V
0
5
10
15
20
25
30
35
26
24
22
20
18
16
14
12
10
8
6
4
2
0
40
Output Current (Amps)
96
94
92
90
88
86
84
82
80
78
76
74
72
70
Loss (Watts)
Efficiency (%)
HPH-5/40-D48
Efficiency and Power Dissipation Vs. Load Current @ +25ºC
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
100 LFM
200 LFM
300 LFM
400 LFM
30
Load Current (Amps)
35
40
45
50
55
60
65
70
Ambient Temperature (ºC)
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MDC_HPH_A12 Page 11 of 12
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
Typical Performance Curves, Continued
HPH-12/30-D48 Maximum Current Temperature Derating at Sea Level
(Vin = 48V, Airflow is from input to output, baseplate is installed)
48
95
40
90
32
VIN = 75V
VIN = 48V
VIN = 36V
85
24
80
16
75
8
35
30
Output Current (Amps)
100
Loss (Watts)
Efficiency (%)
HPH-12/30-D48
Efficiency and Power Dissipation Vs. Line Voltage and Load Current @ +25ºC
25
20
15
Natural convection
100 LFM
200 LFM
300 LFM
400 LFM
10
Power Dissipation @ Vin = 48V
5
70
0
3
6
9
12
15
18
Load Current (Amps)
21
24
27
0
30
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (ºC)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: [email protected] ISO 9001 and 14001 REGISTERED
02/19/09
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.
© 2008 Murata Power Solutions, Inc.
www.murata-ps.com
USA:
Mansfield (MA), Tel: (508) 339-3000, email: [email protected]
Canada:
Toronto, Tel: (866) 740-1232, email: [email protected]
UK:
Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected]
France:
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected]
Germany:
München, Tel: +49 (0)89-544334-0, email: [email protected]
Japan:
Tokyo, Tel: 3-3779-1031, email: [email protected]
Osaka, Tel: 6-6354-2025, email: [email protected]
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
Singapore:
Parkway Centre, Tel: +65 6348 9096, email: [email protected]
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HPH_A12 Page 12 of 12
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