HPH-12/30-D48 Series www.murata-ps.com Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters T Typical u ypical unit ni FEATURES PRODUCT OVERVIEW For applications requiring improved electrical and up to 93%, tight line and load regulation, low ripple/  12Vout @ 30A (360W) thermal performance, consider Murata’s new HPH noise, and a fast dynamic load response. A single-  Industry Standard “Half Brick” package series “Half Brick” DC/DC power converters. These board, highly optimized thermal design contributes  High Effi ciency: up to 93% compact modules measure 2.4" X 2.3" X 0.4" (61 to the superior thermal performance.  Outstanding thermal performance X 58 X 10.2mm) and offer the industry-standard These DC/DC’s provide output trim, sense pins, Half Brick footprint.  Optional Baseplate for conduction cooled and primary side on/off control. Standard features applications The module will provide a 12Vdc output at also include input under-voltage shutdown, output  No output reverse conduction 30Amps and accept a wide range input voltage of over-voltage protection, output short-circuit/current 36-75Vdc. The HPH topology offers high effi ciency limiting protection, and thermal shutdown.  Input to Output Isolation, 2250Vdc (Basic)  Input under-voltage lockout  On/Off Control (Positive or Negative Logic)  Output over-voltage protection  Thermal shutdown  Output short circuit protection (hiccup technique) +SENSE +Vin (6) (4) +Vout (5) SWITCH CONTROL –Vout (9) –Vin (1) –SENSE (8) PULSE Input undervoltage, input TRANSFORMER overvoltage, and output overvoltage comparators PWM OPTO REFERENCE & Vout ISOLATION CONTROLLER ERROR AMP TRIM (7) REMOTE ON /OFF CONTROL* Typical topology is shown. Some models may vary slightly. (3) * Can be ordered with positive (standard) or negative (optional) polarity. Figure 1. Simplifi ed Schematic For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 1 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input Efficiency Package VOUT IOUT IIN, no IIN, full Power R/N (mV pk-pk) Regulation (Max.) VIN Nom. Range (Case/ (Volts) (Amps, load load (Volts) (Volts)  Root Model (Watts) Typ. Max. Line Load Min. Typ. Pinout) ➁ Max.) ➁ (mA) (Amps) HPH-12/30-D48 12 30 360 100 200 ±0.05% ±0.1% 48 36-75 150 8.1 92% 93% C61 P17  Please refer to the full model number structure for additional ordering part numbers and options.  Please refer to maximum input/output voltage graph.  All specifi cations are at nominal line voltage and full load, +25ºC. unless otherwise noted. See detailed specifi cations.  Full power continuous output requires baseplate installation. Please refer to the derating curves. PART NUMBER STRUCTURE HPH - 12 / 30 D48 N B H H Lx C - - High-Power Half RoHS Hazardous Materials compliance Brick Series C = RoHS-6 (no lead), standard, does not claim EU exemption 7b – lead in solder Y = RoHS-5 (with lead), optional, special quantity order Nominal Output Voltage Pin length option Blank = standard pin length 0.180 in. (4.6 mm) Maximum Output Current L1 = 0.110 in. (2.79 mm)* *Special quantity order is in Amps L2 = 0.145 in. (3.68 mm)* required; samples available with standard pin length only. Input Voltage Range: Conformal coating (optional) D48 = 36-75 Volts (48V nominal) Blank = no coating, standard Note: H = Coating added, optional, special quantity order Some model number combinations On/Off Control Polarity Baseplate (optional) may not be available. See website N = Negative polarity, standard Blank = No baseplate, standard or contact your local Murata sales representative. P = Positive polarity, optional B = Baseplate installed, optional quantity order 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 suffi cient, install additional discrete wiring. www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 2 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters FUNCTIONAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 0 75 Vdc Ambient temperature range -40 85 Vdc Operating or non-operating, tested: Input Voltage, Transient 0 100 Vdc 100 mS max. duration Input to output tested 100 mS Isolation Voltage 2250 Vdc IEC/EN/UL 60950-1, 2nd Edition Input Reverse Polarity None, install external fuse None Vdc On/Off Remote Control Power on or off, referred to -Vin 0 50 Vdc Output Power 0 450 W Current-limited, no damage, Output Current 030A short-circuit protected Storage Temperature Range Vin = Zero (no power) -55 125 ˚C 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 Specifi cations Table is not implied nor recommended. INPUT 36 48 75 Vdc Operating voltage range ➁ Turn On/Start-up threshold Rising input voltage 33 34 35 Vdc Turn Off/Undervoltage lockout Falling input voltage 31 32 33 Vdc Reverse Polarity Protection None, install external fuse None Vdc Recommended External Fuse Fast blow 20 A Internal Filter Type Pi Input current Full Load Conditions Vin = nominal 8.06 8.23 A Low Line Vin = minimum 10.75 10.98 A 2 Inrush Transient 0.3 A -Sec. Output in Short Circuit 50 100 mA No Load Iout = minimum, unit=ON 150 200 mA Standby Mode (Off, UV, OT) 45 mA Refl ected (back) ripple current ➂ Measured at input with specifi ed fi lter 60 100 mA, RMS GENERAL and SAFETY Effi ciency Vin=48V, full load 92 93 % Vin=36V, full load 92 93 % Isolation Isolation Voltage: no baseplate Input to output, continuous 2250 Vdc Input to output, continuous TBD Vdc Isolation Voltage: with baseplate Input to Baseplate, continuous 1500 Output to Baseplate, continuous 1500 Insulation Safety Rating basic Isolation Resistance 100 Mohm Isolation Capacitance 2,000 pF Safety (Designed to meet the following UL-60950-1, CSA-C22.2 No.60950-1, Yes requirements) IEC/EN60950-1, 2nd Edition Per MIL-HDBK-217F 6 TBD Hours x 10 Ground benign, Tambient=+30˚C Calculated MTBF Per Telcordia SR332, issue 1 class 3, ground 6 1.4 Hours x 10 fi xed, Tambient=+40˚C DYNAMIC CHARACTERISTICS Fixed Switching Frequency 350 400 450 KHz Power On to Vout regulated 10-90% Startup Time 20 mS (50% resistive load) Startup Time Remote ON to 10% Vout (50% resistive load) 20 mS 50-75-50% load step, settling time to within Dynamic Load Response 200 400 μSec ±1% of Vout di/dt = 1 A/μSec Dynamic Load Peak Deviation same as above ±400 mV FEATURES and OPTIONS Remote On/Off Control ➃ “N” suffi x: Negative Logic, ON state ON = Pin grounded or external voltage 0 0.8 V Negative Logic, OFF state OFF = Pin open or external voltage 3.5 13.5 V Control Current open collector/drain 1 2 mA “P” suffi x: Positive Logic, ON state ON = Pin open or external voltage 3.5 13.5 V Positive Logic, OFF state OFF = Pin grounded or external voltage 0 1 V Control Current open collector/drain 1 2 mA Base Plate “B” suffi x www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 3 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) OUTPUT Total Output Power See Derating 0.0 360 W Voltage Nominal Output Voltage No trim 11.88 12.00 12.12 Vdc Setting Accuracy At 50% load -1 1 % of Vnom. Output Voltage Range User-adjustable [6] -10 10 % of Vnom. Overvoltage Protection Via magnetic feedback 14.5 Vdc Current Output Current Range 030A Minimum Load No minimum load 98% of Vnom., after warmup 31.5 37 44 A Current Limit Inception ➄ Short Circuit Hiccup technique, autorecovery within ±1% of Short Circuit Current 6.6 A Vout, non-latching Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Current limiting Regulation ➅ Line Regulation Vin=min. to max. Vout=nom., 50% load ±0.05 % Load Regulation Iout=min. to max. Vin=48V. ±0.1 % Ripple and Noise ➆ 5 Hz- 20 MHz BW 100 200 mV pk-pk Temperature Coeffi cient At all outputs 0.02 % of Vnom./°C Maximum Capacitive Loading Cap. ESR=<0.02Ω, Full resistive load 0 10,000 μF (10% ceramic, 90% Oscon) MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) Cxx case 2.3 X 2.4 X 0.4 Inches WxLxH (Please refer to outline drawing) 58.4 X 60.96 X 10.2 mm Outline Dimensions (with baseplate) 2.3 X 2.4 X 0.5 Inches 36.8x58.4x12.7 mm Weight (no baseplate) TBD Ounces TBD Grams Weight (with baseplate) Ounces Grams Through Hole Pin Diameter Inches mm Through Hole Pin Material Copper alloy TH Pin Plating Metal and Thickness Nickel subplate μ-inches Gold overplate μ-inches Case or Baseplate Material Aluminum ENVIRONMENTAL With derating, full power, natural convection, Operating Ambient Temperature Range -40 85 ˚C no baseplate Operating Ambient Temperature Range with No derating, with baseplate, full power -40 120 ˚C Baseplate Storage Temperature Vin = Zero (no power) -55 125 ˚C Thermal Protection/Shutdown Measured at hotspot 120 ˚C Electromagnetic Interference External fi lter required B Class Conducted, EN55022/CISPR22 Radiated, EN55022/CISPR22 B Class Relative humidity, non-condensing To +85°C 10 90 %RH Altitude -500 10,000 feet (must derate -1%/1000 feet) -152 3048 meters RoHS-6 or RoHS-5 RoHS rating (specify) ➂ Input (back) ripple current is tested and speciŢ ed over 5 Hz to 20 MHz bandwidth. Input Ţ ltering is Notes Cbus = 0 µF, Cin = 100 µF and Lbus = < 4.7 µH. ➀ Unless otherwise noted, all speciŢ cations are at nominal input voltage, nominal output voltage ➃ The Remote On/Off Control is referred to -Vin. and full load. General conditions are +25˚ Celsius ambient temperature, near sea level altitude, ➄ Over-current protection is non-latching with auto reovery (Hiccup) natural convection airţ ow. All models are tested and speciŢ ed with external parallel 1 µF and 10 µF ➅ Regulation speciŢ cations describe the output voltage changes as the line voltage or load current is multi-layer ceramic output capacitors. No external input capacitors are installed. All capacitors are varied from its nominal or midpoint value to either extreme. low-ESR types wired close to the converter. These capacitors are necessary for our test equipment ➆ Output Ripple & Noise is measured with 750 µF capacitance, 10% ceramic and 90% OSCON. 20 and may not be needed in the user’s application. MHz bandwidth. ➁ The module will operate when input voltage is within the 36-75V Operating Voltage Range, Output regulation at full load will be achieved only when Vin >= 39V www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 4 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters TYPICAL PERFORMANCE DATA Stepload Transient Response Transient Response (Load 50% to 75%) Transient Response (Load 50% to 100%) On/Off Enable Start-up Enable Start-up (Vin=48V Iout=30A) Enable Start-up (Vin=48V Iout=0A) Ripple and Noise Ripple and Noise Waveform (Vin=48V Iout=30A) Ripple and Noise Waveform (Vin=48V Iout=0A) www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 5 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters TYPICAL PERFORMANCE DATA Effi ciency vs Line Voltage and Load Current @ +25°C Maximum Current Temperature Derating vs. Airfl ow (Vin=48V., airfl ow direction is from –Vin to +Vin, no baseplate) 98 35 96 94 30 92 25 90 VIN = 75 V 20 VIN = 48 V Natural Convection 88 100 LFM VIN = 36V 15 200 LFM 86 300 LFM 400 LFM 10 84 82 5 80 0 30 35 40 45 50 55 60 65 70 75 80 85 78 Ambient Temperature (°C) 3 6 9 12151821242730 Load Current (Amps) Maximum Current Temperature Derating vs. Airfl ow Maximum Current Temperature Derating vs. Airfl ow (Vin=48V., airfl ow direction is from –Vin to +Vin, with baseplate) (Vin=48V., airfl ow direction is from Vin to Vout, with baseplate) 35 35 30 30 25 25 20 20 Natural Convection Natural Convection 15 15 100 LFM 100 LFM 200 LFM 200 LFM 10 300 LFM 10 300 LFM 400 LFM 400 LFM 5 5 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 6 of 13 Output Current (Amps) Efficiency (%) Output Current (Amps) Output Current (Amps) HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters MECHANICAL SPECIFICATIONS 2.30 A Do not remove User’s thermal surface and hardware (58.4) Recommended threaded insert torque M3 x 0.50 is 0.35-0.55 N-M or 3-5 in-lbs. threaded inserts Baseplate from bottom PCB 0.40 (10.2) 0.50 (12.7) 0.015 min. clearance 0.015 minimum Pin Diameters: between standoffs and 0.18 clearance between Pins 1-4, 6-8 0.040 ± 0.001 (1.016 ±0.025) 0.18 highest component (4.6) standoffs and (4.57) Pins 5, 9 0.080 ± 0.001 (2.032 ±0.025) highest component 1.900 0.20 A (48.26) (5.1) 2.30 (58.4) 1.90 (48.3) B 1 9 M3 x 0.50 threaded insert and standoff (4 places) 2 8 Case C61 Screw length must 2.00 2.40 1.400 2.40 7 not go through Baseplate (50.8) (61.0) (35.56) (60.96) 1.000 (25.40) 3 6 0.700 (17.78) 0.400 (10.16) 4 5 0.50 HPH with Optional Baseplate (12.70) Bottom View B Dimensions are in inches (mm) shown for ref. only. Third Angle Projection INPUT/OUTPUT CONNECTIONS Tolerances (unless otherwise specified): Pin Function P17 .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) 1 Negative Input Angles ± 2˚ 2 Not Available Components are shown for reference only. 3 On/Off Control 4 Positive Input Since there is some pin numbering inconsistency between manufacturers of half brick converters, 5 Positive Output be sure to follow the pin function, not the pin number, when laying out your board. 6 Positive Sense 7 Trim Standard pin length is shown. Please refer to the Part Number Structure for special order pin 8 Negative Sense lengths. 9 Negative Output The Trim connection may be left open and the converter will achieve its rated output voltage. www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 7 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters impedance, performance is improved by adding external fi lter components. TECHNICAL NOTES Sometimes only a small ceramic capacitor is suffi cient. Since it is diffi cult to Input Fusing totally characterize all applications, some experimentation may be needed. Certain applications and/or safety agencies may require fuses at the inputs of Note that external input capacitors must accept high speed switching currents. power conversion components. Fuses should also be used when there is the Because of the switching nature of DC/DC converters, the input of these possibility of sustained input voltage reversal which is not current-limited. For converters must be driven from a source with both low AC impedance and greatest safety, we recommend a fast blow fuse installed in the ungrounded adequate DC input regulation. Performance will degrade with increasing input input supply line. inductance. Excessive input inductance may inhibit operation. The DC input The installer must observe all relevant safety standards and regulations. For regulation specifi es that the input voltage, once operating, must never degrade safety agency approvals, install the converter in compliance with the end-user below the Shut-Down Threshold under all load conditions. Be sure to use safety standard, i.e. IEC/EN/UL 60950-1. adequate trace sizes and mount components close to the converter. Input Reverse-Polarity Protection I/O Filtering, Input Ripple Current and Output Noise If the input voltage polarity is reversed, an internal diode will become forward All models in this converter series are tested and specifi ed for input refl ected biased and likely draw excessive current from the power source. If this source ripple current and output noise using designated external input/output compo- is not current-limited or the circuit appropriately fused, it could cause perma- nents, circuits and layout as shown in the fi gures below. External input capacitors nent damage to the converter. (Cin in the fi gure) serve primarily as energy storage elements, minimizing line voltage variations caused by transient IR drops in the input conductors. Users Input Under-Voltage Shutdown and Start-Up Threshold should select input capacitors for bulk capacitance (at appropriate frequen- Under normal start-up conditions, converters will not begin to regulate properly cies), low ESR and high RMS ripple current ratings. In the fi gure below, the Cbus until the ramping-up input voltage exceeds and remains at the Start-Up and Lbus components simulate a typical DC voltage bus. Your specifi c system Threshold Voltage (see Specifi cations). Once operating, converters will not confi guration may require additional considerations. Please note that the values turn off until the input voltage drops below the Under-Voltage Shutdown Limit. of Cin, Lbus and Cbus will vary according to the specifi c converter model. 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 opera- tion at a single input voltage. Users should be aware however of input sources near the Under-Voltage TO CURRENT Shutdown whose voltage decays as input current is consumed (such as capac- OSCILLOSCOPE PROBE itor inputs), the converter shuts off and then restarts as the external capacitor +VIN recharges. Such situations could oscillate. To prevent this, make sure the LBUS + operating input voltage is well above the UV Shutdown voltage AT ALL TIMES. – VIN CBUS CIN + Start-Up Time – Assuming that the output current is set at the rated maximum, the Vin to Vout –VIN Start-Up Time (see Specifi cations) is the time interval between the point when CIN = 33μF, ESR < 700mΩ @ 100kHz the ramping input voltage crosses the Start-Up Threshold and the fully loaded CBUS = 220μF, ESR < 100mΩ @ 100kHz regulated output voltage enters and remains within its specifi ed accuracy band. LBUS = 12μH Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and fi nal value of the input voltage as it Figure 2. Measuring Input Ripple Current appears at the converter. These converters include a soft start circuit to moderate the duty cycle of its In critical applications, output ripple and noise (also referred to as periodic PWM controller at power up, thereby limiting the input inrush current. and random deviations or PARD) may be reduced by adding fi lter elements such as multiple external capacitors. Be sure to calculate component tem- The On/Off Remote Control interval from On command to Vout regulated perature rise from refl ected AC current dissipated inside capacitor ESR. Our assumes that the converter already has its input voltage stabilized above the Application Engineers can recommend potential solutions. Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specifi ed accuracy In fi gure 3, the two copper strips simulate real-world printed circuit imped- band. The specifi cation assumes that the output is fully loaded at maximum ances between the power supply and its load. In order to minimize circuit rated current. Similar conditions apply to the On to Vout regulated specifi cation errors and standardize tests between units, scope measurements should be such as external load capacitance and soft start circuitry. made using BNC connectors or the probe ground should not exceed one half inch and soldered directly to the fi xture. Input Source Impedance These converters will operate to specifi cations without external components, assuming that the source voltage has very low impedance and reason- able input voltage regulation. Since real-world voltage sources have fi nite www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 8 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters Note that the temperatures are of the ambient airfl ow, not the converter itself which is obviously running at higher temperature than the outside air. 6 COPPER STRIP +SENSE Also note that very low fl ow rates (below about 25 LFM) are similar to “natural 5 +OUTPUT convection”, that is, not using fan-forced airfl ow. MPS makes Characterization measurements in a closed cycle wind RLOAD C1 SCOPE C2 tunnel with calibrated airfl ow. We use both thermocouples and an infrared camera system to observe thermal performance. As a practical matter, it is 9 -OUTPUT quite diffi cult to insert an anemometer to precisely measure airfl ow in most 8 -SENSE COPPER STRIP applications. Sometimes it is possible to estimate the effective airfl ow if you thoroughly understand the enclosure geometry, entry/exit orifi ce areas and the fan fl owrate specifi cations. If in doubt, contact MPS to discuss placement and C1 = 0.1μF CERAMIC C2 = 10μF TANTALUM measurement techniques of suggested temperature sensors. LOAD 2-3 INCHES (51-76mm) FROM MODULE CAUTION: If you routinely or accidentally exceed these Derating guidelines, Figure 3. Measuring Output Ripple and Noise (PARD) 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 Floating Outputs the derating for higher density altitude. Since these are isolated DC/DC converters, their outputs are “fl oating” with respect to their input. The essential feature of such isolation is ideal ZERO Output Overvoltage Protection CURRENT FLOW between input and output. Real-world converters however do This converter monitors its output voltage for an over-voltage condition using exhibit tiny leakage currents between input and output (see Specifi cations). an on-board electronic comparator. The signal is optically coupled to the pri- These leakages consist of both an AC stray capacitance coupling component mary side PWM controller. If the output exceeds OVP limits, the sensing circuit and a DC leakage resistance. When using the isolation feature, do not allow will power down the unit, and the output voltage will decrease. After a time-out the isolation voltage to exceed specifi cations. Otherwise the converter may period, the PWM will automatically attempt to restart, causing the output volt- be damaged. Designers will normally use the negative output (-Output) as age to ramp up to its rated value. It is not necessary to power down and reset the ground return of the load circuit. You can however use the positive output the converter for this automatic OVP-recovery restart. (+Output) as the ground return to effectively reverse the output polarity. If the fault condition persists and the output voltage climbs to excessive Minimum Output Loading Requirements levels, the OVP circuitry will initiate another shutdown cycle. This on/off cycling These converters employ a synchronous rectifi er design topology. All models is referred to as “hiccup” mode. It safely tests full current rated output voltage regulate within specifi cation and are stable under no load to full load condi- without damaging the converter. tions. Operation under no load might however slightly increase output ripple Output Fusing and noise. The converter is extensively protected against current, voltage and temperature Thermal Shutdown extremes. However your output application circuit may need additional protec- To prevent many over temperature problems and damage, these converters tion. In the extremely unlikely event of output circuit failure, excessive voltage include thermal shutdown circuitry. If environmental conditions cause the could be applied to your circuit. Consider using an appropriate fuse in series temperature of the DC/DC’s to rise above the Operating Temperature Range with the output. up to the shutdown temperature, an on-board electronic temperature sensor Output Current Limiting will power down the unit. When the temperature decreases below the turn-on As soon as the output current increases to its maximum rated value, the DC/DC threshold, the converter will automatically restart. There is a small amount of hysteresis to prevent rapid on/off cycling. The temperature sensor is typically converter will enter a current-limiting mode. The output voltage will decrease proportionally with increases in output current, thereby maintaining a some- located adjacent to the switching controller, approximately in the center of the unit. See the Performance and Functional Specifi cations. what constant power output. This is commonly referred to as power limiting. Current limiting inception is defi ned as the point at which full power falls CAUTION: If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Be sure to thoroughly test your applica- below the rated tolerance. See the Performance/Functional Specifi cations. Note particularly that the output current may briefl y rise above its rated value. This tion to avoid unplanned thermal shutdown. enhances reliability and continued operation of your application. If the output Temperature Derating Curves current is too high, the converter will enter the short circuit condition. The graphs in this data sheetillustrate typical operation under a variety of Output Short Circuit Condition conditions. The Derating curves show the maximum continuous ambient air When a converter is in current-limit mode, the output voltage will drop as temperature and decreasing maximum output current which is acceptable under increasing forced airfl ow measured in Linear Feet per Minute (“LFM”). the output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also Note that these are AVERAGE measurements. The converter will accept brief increases in temperature and/or current or reduced airfl ow as long as the aver- drop, thereby shutting down the PWM controller. Following a time-out period, the PWM will restart, causing the output voltage to begin ramping up to its age is not exceeded. www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 9 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters appropriate value. If the short-circuit condition persists, another shutdown a single fi xed resistor connected between the Trim input and either the +Sense cycle will initiate. This on/off cycling is called “hiccup mode”. The hiccup or –Sense terminals. (On some converters, an external user-supplied precision cycling reduces the average output current, thereby preventing excessive DC voltage may also be used for trimming). Trimming resistors should have a internal temperatures. A short circuit can be tolerated indefi nitely. low temperature coeffi cient (±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 Remote Sense Input trim unconnected. With no trim, the converter will exhibit its specifi ed output Sense inputs compensate for output voltage inaccuracy delivered at the load. voltage accuracy. This is done by correcting voltage drops along the output wiring such as mod- There are two CAUTION’s to be aware for the Trim input: erate 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 CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the control loop phase margin. 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 Note: The Sense input and power Vout lines are internally connected through OVP circuit may inadvertantly shut down the converter. If the maximum power low value resistors to their respective polarities so that the converter can is exceeded, the converter may enter current limiting. If the power is exceeded operate without external connection to the Sense. Nevertheless, if the Sense for an extended period, the converter may overheat and encounter overtem- function is not used for remote regulation, the user should connect +Sense to perature shut down. +Vout and –Sense to –Vout at the converter pins. CAUTION: Be careful of external electrical noise. The Trim input is a senstive The remote Sense lines carry very little current. They are also capacitively input to the converter’s feedback control loop. Excessive electrical noise may coupled to the output lines and therefore are in the feedback control loop to cause instability or oscillation. Keep external connections short to the Trim regulate and stabilize the output. As such, they are not low impedance inputs input. Use shielding if needed. Also consider adding a small value ceramic and must be treated with care in PC board layouts. Sense lines on the PCB capacitor between the Trim and –Vout to bypass RF and electrical noise. 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: +VOUT [Vout(+) –Vout(-)] – [ Sense(+) – Sense(-)] ≤ 10% of Vout +VIN +SENSE Contact and PCB resistance losses due to IR drops +VOUT 5-22 7 ON/OFF +VIN TRIM LOAD TURNS CONTROL I OUT +SENSE Sense Current –SENSE ON/OFF TRIM LOAD CONTROL –VIN Sense Return –VOUT –SENSE I OUT Return Figure 5. Trim adjustments using a trimpot –VIN –VOUT Contact and PCB resistance losses due to IR drops +VOUT Figure 4. Remote Sense Circuit Confi guration +VIN Output overvoltage protection is monitored at the output voltage pin, not the +SENSE Sense pin. Therefore excessive voltage differences between Vout and Sense together with trim adjustment of the output can cause the overvoltage protec- ON/OFF TRIM LOAD tion circuit to activate and shut down the output. CONTROL R TRIM UP Power derating of the converter is based on the combination of maximum –SENSE output current and the highest output voltage. Therefore the designer must insure: (Vout at pins) x (Iout) ≤ (Max. rated output power) –VIN –VOUT Trimming the Output Voltage The Trim input to the converter allows the user to adjust the output voltage Figure 6. Trim adjustments to Increase Output Voltage using a Fixed Resistor over the rated trim range (please refer to the Specifi cations). In the trim equa- tions and circuit diagrams that follow, trim adjustments use either a trimpot or www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 10 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters Negative: Optional negative-polarity devices are on (enabled) when the On/ +VOUT Off is grounded or brought to within a low voltage (see Specifi cations) with +VIN respect to –Vin. The device is off (disabled) when the On/Off is pulled high to +Vin with respect to –Vin. +SENSE ON/OFF TRIM LOAD CONTROL +VIN +VCC R TRIM DOWN –SENSE ON/OFF –VIN –VOUT CONTROL Figure 7. Trim adjustments to Decrease Output Voltage using a Fixed Resistor –VIN V x (1+Δ) 1 ( ) nominal R in kΩ = - - 2 adj_up 1.225 x Δ Δ Figure 9. Driving the Negative Polarity On/Off Control Pin V -V out nominal where Δ = V nominal Dynamic control of the On/Off function should be able to sink appropriate signal current when brought low and withstand appropriate voltage when 1 brought high. Be aware too that there is a fi nite time in milliseconds (see ( ) R in kΩ = - 2 adj_down Δ Specifi cations) between the time of On/Off Control activation and stable, V -V nominal out regulated output. This time will vary slightly with output load type and current where Δ = V nominal and input conditions. Trim Equations There are two CAUTIONs for the On/Off Control: Where Vref = +1.225 Volts and Δ is the desired output voltage change. Note CAUTION: While it is possible to control the On/Off with external logic if you that "Δ" is given as a small fraction, not a percentage. carefully observe the voltage levels, the preferred circuit is either an open A single resistor connected between Trim and +Sense will increase the output drain/open collector transistor or a relay (which can thereupon be controlled by voltage. A resistor connected between Trim and –Sense will decrease the output. logic). Remote On/Off Control CAUTION: Do not apply voltages to the On/Off pin when there is no input On the input side, a remote On/Off Control can be ordered with either polarity. power voltage. Otherwise the converter may be permanently damaged. Positive: Standard models are enabled when the On/Off pin is left open or Soldering Guidelines is pulled high to +Vin with respect to –Vin. An internal bias current causes the Murata Power Solutions recommends the specifi cations below when installing these open pin to rise to +Vin. Some models will also turn on at lower intermediate converters. These specifi cations vary depending on the solder type. Exceeding these voltages (see Specifi cations). Positive-polarity devices are disable when the specifi cations may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. On/Off is grounded or brought to within a low voltage (see Specifi cations) with respect to –Vin. 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. + Vcc Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. ON/OFF CONTROL Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds CONTROL –VIN Figure 8. Driving the Positive Polarity On/Off Control Pin www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 11 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters Emissions Performance [3] Conducted Emissions Test Results Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power while doing the tests. The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information is listed in the Product Specifi cations. An external discrete fi lter is installed and the circuit diagram is shown below. VCC RTN L1 L2 C1 C2 C3 C4 C5 + + LOAD C6 C7 C12 DC/DC -48V GND C8 C9 C10 C11 GND Figure 10. Conducted Emissions Test Circuit Graph 1. Conducted emissions performance, Positive Line, CISPR 22, Class B, full load at 48Vin [1] Conducted Emissions Parts List Reference Part Number Description Vendor SMD CERAMIC-100V- C1, C2, C3, C4, C5 GRM32ER72A105KA01L Murata 1000nF-X7R-1210 SMD CERAMIC 100V-100nF- C6 GRM319R72A104KA01D Murata ±10%-X7R-1206 COMMON MODE-473uH- L1, L2 PG0060T Pulse ±25%-14A SMD CERAMIC630V-0.22μF- C8, C9, C10, C11 GRM55DR72J224KW01L Murata ±10%-X7R-2220 Aluminum100V-220μf- C7 UHE2A221MHD Nichicon ±10%-long lead C12 NA [2] Conducted Emissions Test Equipment Used Hewlett Packard HP8594L Spectrum Analyzer – S/N 3827A00153 2Line V-networks LS1-15V 50Ω/50Uh Line Impedance Stabilization Network Graph 2. Conducted emissions performance, Negative Line, CISPR 22, Class B, full load at 48Vin [4] Layout Recommendations Most applications can use the fi ltering which is already installed inside the converter or with the addition of the recommended external capacitors. For greater emissions suppression, consider additional fi lter components and/or shielding. Emissions performance will depend on the user’s PC board layout, the chassis shielding environment and choice of external components. Please refer to Application Note GEAN-02 for further discussion. Since many factors affect both the amplitude and spectra of emissions, we recommend using an engineer who is experienced at emissions suppression. www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 12 of 13 HPH-12/30-D48 Series Isolated, 12 VOUT, 30A, Half-Brick DC/DC Converters Vertical Wind Tunnel Murata Power Solutions employs a custom-designed enclosed vertical wind tunnel, infrared video camera system and test instrumentation for accurate airfl ow and heat dis- sipation analysis of power products. The system includes IR Transparent a precision low fl ow-rate anemometer, variable speed fan, optical window power supply input and load controls, temperature gauges and Variable Unit under adjustable heating element. speed fan test (UUT) The IR camera can watch thermal characteristics of the IR Video Unit Under Test (UUT) with both dynamic loads and static Camera steady-state conditions. A special optical port is used which is transparent to infrared wavelengths. The computer fi les from the IR camera can be studied for later analysis. Both through-hole and surface mount converters are sol- dered down to a host carrier board for realistic heat absorption Heating and spreading. Both longitudinal and transverse airfl ow stud- element ies are possible by rotation of this carrier board since there are Precision often signifi cant differences in the heat dissipation in the two low-rate airfl ow directions. The combination of both adjustable airfl ow, anemometer adjustable ambient heat and adjustable Input/Output currents 3” below UUT and voltages mean that a very wide range of measurement conditions can be studied. Ambient The airfl ow collimator mixes the heat from the heating ele- temperature ment to make uniform temperature distribution. The collimator sensor also reduces the amount of turbulence adjacent to the UUT by restoring laminar airfl ow. Such turbulence can change the Airflow effective heat transfer characteristics and give false readings. collimator Excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element and fan, built-in Figure 11. Vertical Wind Tunnel temperature gauges and no-contact IR camera mean that power supplies are tested in real-world conditions. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 129 Flanders Road, Westborough, MA 01581 U.S.A. Refer to: http://www.murata-ps.com/requirements/ 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. Specifi cations are subject to change without notice. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_HPH-12/30-D48.B02 Page 13 of 13