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HPH Series
Isolated, Low V OUT to 70A, Half-Brick DC/DC Converters
DYNAMIC CHARACTERISTICS
Dynamic Load Response, μSec to ±1% ?nal value, (50-75-50%, load step)
Start-up Time, V IN to V OUT
Remote On/Off to V OUT regulated (Max.)
Switching Frequency
Calculated MTBF
Operating Temperature Range
Storage Temperature Range
Thermal Protection/Shutdown
Relative Humidity
Pre-biased Startup
PHYSICAL CHARACTERISTICS
HPH-3.3/70-D48
HPH-5/40-D48
HPH-3.3/70-D48, HPH-5/40-D48
HPH-3.3/70-D48, HPH-5/40-D48
HPH-3.3/70-D48
HPH-5/40-D48
150μS
200μS
10 mS
10 mS
450 KHz
440 KHz
TDB
-40 to +85oC, see derating curves
-55 to +125oC
120oC
To +85oC/85%, non condensing
V OUT must be ≤ V SET
Outline Dimensions
Baseplate Material
Pin Material
Pin Diameter
Pin Finish
Weight
Electromagnetic Interference (conducted and radiated) (may require external ?lter)
Safety
ABSOLUTE MAXIMUM RATINGS
See mechanical specs
Aluminum
Copper alloy
0.04/0.08" (1.016/2.032mm)
Nickel underplate with gold overplate
2 ounces (56.7g)
Class B, EN55022/CISPR22
Certi?ed to UL/cUL 60950-1, CSA-C22.2 No.60950-1,
IEC/EN 60950-1, 2nd Edition
Input Voltage
On/Off Control, referred to -V IN
Input Reverse Polarity Protection
Output Overvoltage, Max.
Storage Temperature
SPECIFICATION NOTES
Min.
Max.
Volts, Min.
Volts, Max. Continuous
Volts, Min.
Volts, Max.
-0.3V
75V continuous
-0.3V
+15V
See fuse section
V OUT + 20%
-55oC
125oC
[1] All speci?cations 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 air?ow. See Derating Curves for temperature performance. All models
are stable and regulate within spec without external cacacitance.
[2] Input Ripple Current is tested and speci?ed over a 5-20 MHz bandwidth and uses a special set of
external ?lters only for the Ripple Current speci?cations. Input ?ltering 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.
[3] Note that Maximum Current Derating Curves indicate an average current at nominal input voltage.
At higher temperatures and/or lower air?ow, the converter will tolerate brief full current outputs if the
total RMS current over time does not exceed the Derating curve.
[4] Mean Time Before Failure (MTBF) is calculated using the Telcordia (Belcore) SR-332 Method 1,
Case 3, ground ?xed conditions. TPCBOARD = +25 °C., full output load, natural air convection.
[5] The output may be shorted to ground inde?nitely with no damage.
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 speci?cations.
[7] Regulation speci?cations 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
speci?cations.
[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 suf?cient, install additional discrete wiring. If
wiring is not suf?cient, the Sense feedback may attempt to drive the outputs beyond ratings.
[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.
[13] Please refer to the separate output capacitive load application note from Murata Power Solutions.
[14] Output noise may be further reduced by installing an external ?lter. See the Application Notes.
[15] To avoid damage or unplanned shutdown, avoid sinking reverse output current.
[16] To protect against accidental input voltage polarity reversal, install a fuse in series with +Vin. See
Fusing information.
[17] HPH-5/40-D48 full current hiccup is approximately 3% duty cycle, 0.8 Hz pulse rate.
www.murata-ps.com/support
MDC_HPH_B01 Page 4 of 13
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