Datasheet
HPH Series
Isolated, Low VOUT to 70A, Half-Brick DC/DC Converters
MDC_HPH_B01 Page 4 of 13
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DYNAMIC CHARACTERISTICS
Dynamic Load Response, μSec to ±1% fi nal value, (50-75-50%, load step)
HPH-3.3/70-D48 150μS
HPH-5/40-D48 200μS
Start-up Time, V
IN to VOUT HPH-3.3/70-D48, HPH-5/40-D48 10 mS
Remote On/Off to VOUT regulated (Max.) HPH-3.3/70-D48, HPH-5/40-D48 10 mS
Switching Frequency
HPH-3.3/70-D48 450 KHz
HPH-5/40-D48 440 KHz
Calculated MTBF TDB
Operating Temperature Range -40 to +85ºC, see derating curves
Storage Temperature Range -55 to +125ºC
Thermal Protection/Shutdown 120ºC
Relative Humidity To +85ºC/85%, non condensing
Pre-biased Startup V
OUT must be ≤ VSET
PHYSICAL CHARACTERISTICS
Outline Dimensions See mechanical specs
Baseplate Material Aluminum
Pin Material Copper alloy
Pin Diameter 0.04/0.08" (1.016/2.032mm)
Pin Finish Nickel underplate with gold overplate
Weight 2 ounces (56.7g)
Electromagnetic Interference (conducted and radiated) (may require external fi lter) Class B, EN55022/CISPR22
Safety
Certifi ed to UL/cUL 60950-1, CSA-C22.2 No.60950-1,
IEC/EN 60950-1, 2nd Edition
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Volts, Min. -0.3V
Volts, Max. Continuous 75V continuous
On/Off Control, referred to -V
IN
Volts, Min. -0.3V
Volts, Max. +15V
Input Reverse Polarity Protection See fuse section
Output Overvoltage, Max. V
OUT + 20%
Storage Temperature
Min. -55ºC
Max. 125ºC
[1] All specifi 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 airfl 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 specifi ed over a 5-20 MHz bandwidth and uses a special set of
external fi lters only for the Ripple Current specifi cations. Input fi 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 airfl 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 fi xed conditions. TPCBOARD = +25 °C., full output load, natural air convection.
[5] The output may be shorted to ground indefi 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 specifi cations.
[7] Regulation specifi 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
specifi 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 suffi cient, install additional discrete wiring. If
wiring is not suffi 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 fi 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.
SPECIFICATION NOTES