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 www.murata-ps.com 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. www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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 www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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. www.murata-ps.com [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. Technical enquiries email: [email protected], tel: +1 508 339 3000 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- www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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. www.murata-ps.com 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, Technical enquiries email: [email protected], tel: +1 508 339 3000 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 www.murata-ps.com 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 Technical enquiries email: [email protected], tel: +1 508 339 3000 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 www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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) www.murata-ps.com Figure 15 – Ripple Waveform (VIN=48V IOUT=70A) Technical enquiries email: [email protected], tel: +1 508 339 3000 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. www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 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