HPQ-8.3/22-D48 Series www.murata-ps.com Isolated 22-Amp Quarter Brick DC-DC Converters PRODUCT OVERVIEW The HPQ-8.3/22-D48 series offers high output systems needing controlled startup/shutdown, an current (up to 22 Amps) in an industry standard external remote On/Off control may use either posi- “quarter brick” package requiring no heat sink for tive or negative polarity. Remote Sense inputs com- most applications. The HPQ-8.3/22-D48 series de- pensate for resistive line drops at high currents. livers fixed 8.3 Vdc output at 183 Watts for printed A wealth of self-protection features avoid prob- circuit board mounting. Wide range inputs on the lems with both the converter and external circuits. Typical unit 2.3" x 1.45" x 0.4" converter are 36 to 75 Volts DC These include input undervoltage lockout and (48 Volts nominal), ideal for datacom and telecom overtemperature shutdown using an on-board tem- systems. The fixed output voltage is regulated to perature sensor. Overcurrent protection using the FEATURES within ±0.25%. “hiccup” autorestart technique provides indefinite Advanced automated surface mount assembly short-circuit protection. Additional safety features „„ 8.3 Volts DC fixed output up to 22 Amps and planar magnetics deliver galvanic isolation include output overvoltage protection and reverse „„ Industry standard quarter brick 2.3" x 1.45" x rated at 2250 Vdc for basic insulation. To power conduction elimination. The synchronous rectifier to- 0.4" open frame package digital systems, the outputs offer fast settling to pology offers high efficiency for minimal heat buildup „„ Wide range 36 to 75 Vdc input voltages with current steps and tolerance of higher capacitive and “no heat sink” operation. The HPQ-8.3/22-D48 2250 Volt Basic isolation loads. Excellent ripple and noise specifications as- series is certified to UL safety standards (pending) sure compatibility to CPU’s, ASIC’s, programmable and RFI/EMI conducted/radiated emission compliance „„ Double lead-free assembly and attachment for logic and FPGA’s. No minimum load is required. For to EN55022, CISPR22 with external filter. RoHS standards „„ Up to 183 Watts total output power „„ High efficiency (92.5%) synchronous rectifier topology „„ Stable no-load operation with no required external APPLICATIONS components „„ „„ Embedded systems, datacom and telecom Instrumentation systems, R&D platforms, auto- „„ Operating temperature range -40 to +85° C. installations mated test fixtures with no heat sink required „„ „„ Disk farms, data centers and cellular repeater sites Data concentrators, voice forwarding and „„ Certified to UL/EN 60950-1, CSA-C22.2 No. speech processing systems „„ Remote sensor systems, dedicated ntrollers 60950-1, 2nd edition safety approvals (certification is pending) „„ Extensive self-protection, current limiting and shut down features „„ “X” optional version omits sense pins Isolation F1 +Vin (1) +Vout (8) Barrier • Switching +Sense (7)* External • Filters On/Off DC Control Controller Power • Current Sense (2) and Power Source Transfer -Sense (5)* Open = On Reference and Closed = Off Error Amplifier (Positive Trim (6)* logic) -Vin (3) -Vout (4) Figure 1. Connection Diagram Typical topology is shown. Murata Power Solutions recommends an external fuse. * “X” option omits sense pins. For full details go to www.murata-ps.com/rohs (certification is pending) www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 1 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input R/N (mV pk-pk) Regulation (Max.) ➁ Efficiency Package (C59) Iout Iin full Vout (Amps, Power Vin Nom. Range Iin no load Dimensions Dimensions (Volts) max.) (Watts) Typ. Max. Line Load (Volts) (Volts) load (mA) (Amps) Min. Typ. (inches) (mm) Root Model ➀ HPQ-8.3/22-D48 8.3 22 182.6 100 150 ±0.125% ±0.25% 48 36-75 140 4.11 91% 92.5% 1.45x2.3x0.4 max. 36.8x58.4x10.2 ➀ Please refer to the part number structure for additional ordering information and options. ➁ All specifications are at nominal line voltage and full load, +25 deg.C. unless otherwise noted. See detailed specifications. Output capacitors are 1 µF ceramic || 10 µF electrolytic with no input caps.These caps are necessary for our test equipment and may not be needed for your application. The load regulation step is 25%. ➂ UL certification is pending. PART NUMBER STRUCTURE N B H X Lx - C HPQ - 8.3 / 22 - D48 RoHS Hazardous Materials compliance Family C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard Series: Y = RoHS-5 (with lead), optional, special quantity order High Power Pin length option Quarter Brick Blank = standard pin length 0.180 in. (4.6 mm) L1 = 0.110 in. (2.79 mm)* Nominal Output Voltage L2 = 0.145 in. (3.68 mm)* *Special quantity order is Sense Pins Option Maximum Rated Output required; samples available Blank = Sense installed, standard Current in Amps with standard pin length only. X = Sense pins removed Input Voltage Range Conformal coating (optional) D48 = 36-75 Volts (48V nominal) Blank = no coating, standard H = Coating added, optional On/Off Control Polarity Baseplate (optional) N = Negative polarity, standard Note: Blank = No baseplate, standard P = Positive polarity, optional Some model number combinations B = Baseplate installed, optional may not be available. See website or contact your local Murata sales representative. Complete Model Number Example: HPQ-8.3/22-D48NBHXL1-C Negative On/Off logic, baseplate installed, conformally coated, sense pins removed, 0.110˝ pin length, RoHS-6 compliance www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 2 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters FUNCTIONAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Conditions ➀ Minimum Typical/Nominal Maximum Units Input Voltage, Continuous Full power operation 36 75 Vdc Operating or non-operating, Input Voltage, Transient 100 Vdc 100 mS max. duration Input to output tested 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 15 Vdc Output Power 0 184.43 W Current-limited, no damage, Output Current 0 22 A 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 Specifications Table is not implied or recommended. INPUT Conditions ➀ ➂ Operating voltage range 36 48 75 Vdc Recommended External Fuse Fast blow 10 A Start-up threshold Rising input voltage 33 34 35 Vdc Undervoltage shutdown Falling input voltage 30 31 32 Vdc Overvoltage protection Rising input voltage None Vdc Reverse Polarity Protection None, install external fuse None Vdc Internal Filter Type TBD Input current Full Load Conditions Vin = nominal 4.11 4.22 A Low Line Vin = minimum 5.48 5.63 A Inrush Transient Vin = 48V. 0.05 0.1 A2-Sec. Output in Short Circuit 640 mA No Load Iout = minimum, unit=ON 140 250 mA Standby Mode (Off, UV, OT) 5 8 mA Reflected (back) ripple current ➁ Measured at input with specified filter 70 mA, RMS Pre-biased startup External output voltage < Vset Monotonic GENERAL and SAFETY Efficiency Vin = 48V, full load 91 92.5 % Vin = 45.6V, full load 91 92.5 % Isolation Isolation Voltage, input to output No baseplate 2250 Vdc Isolation Voltage, input to baseplate With baseplate 1500 Vdc Isolation Voltage, output to baseplate With baseplate 1500 Vdc Insulation Safety Rating basic Isolation Resistance 10 MΩ Isolation Capacitance 1000 pF Certified to UL-60950-1, CSA-C22.2 No.60950- Safety 1, IEC/EN60950-1, 2nd edition Yes (certification is pending) Per MIL-HDBK-217F, ground benign, 3 Calculated MTBF TBD Hours x 10 Tambient=+TBD°C Per Telcordia SR-332, issue 1, class 3, ground 3 Calculated MTBF 2200 Hours x 10 fixed, Tambient=+25°C DYNAMIC CHARACTERISTICS Fixed Switching Frequency 270 300 330 KHz Power On, to Vout regulation band, Startup Time 15 mS 100% resistive load Startup Time Remote ON to Vout Regulated 15 mS Dynamic Load Response 50-75-50% load step to 1% error band 350 µSec Dynamic Load di/dt TBD A / µSec Dynamic Load Peak Deviation same as above 11 % Vout FEATURES and OPTIONS Remote On/Off Control ➃ “N” suffix: Negative Logic, ON state ON = pin grounded or external voltage 0 1 Vdc Negative Logic, OFF state OFF = pin open or external voltage 3.5 13.5 Vdc Control Current open collector/drain 2 mA www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 3 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) FEATURES and OPTIONS (cont.) Conditions ➀ Minimum Typical/Nominal Maximum Units Remote On/Off Control (cont.) ➃ “P” suffix: Positive Logic, ON state ON = pin open or external voltage 5 13.5 V Positive Logic, OFF state OFF = ground pin or external voltage 0 1 V Control Current open collector/drain 2 mA (Vout - Vsense) Sense pins connected externally Remote Sense Compliance ➆ 0.5 V at load Base Plate "B" suffix optional OUTPUT Total Output Power Vin = 48V. 0.0 182.6 184.4 W Voltage (Please refer to the Ordering Guide) Setting Accuracy At 50% load, no trim -1 1 % Vout User-adjustable 7.47 8.3 9.13 V Output Voltage Range ➆ Overvoltage Protection Full load 9.5 12 % Vout Current Output Current Range 0.0 22 22 A Minimum Load No minimum load Current Limit Inception 97% of Vnom., after warmup 25 29 34.5 A Short Circuit Hiccup technique, autorecovery within 1.25% Short Circuit Current 5.0 A of Vout Short Circuit Duration Output shorted to ground, no damage Continuous (remove short for recovery) Short circuit protection method Hiccup current limiting Non-latching Regulation ➄ Line Regulation Vin = min. to max., Vout=nom., full load ±0.125 % of Vout Load Regulation Iout=min. to max., Vin = nom. ±0.25 % of Vout 5 Hz- 20 MHz BW, Cout=1µF MLCC paralleled 100 150 mV pk-pk Ripple and Noise ➅ with 10µF tantalum Temperature Coefficient At all outputs ±0.02 % of Vout./°C Maximum Capacitive Loading Full resistive load, low ESR 600 4700 10,000 μF MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) C59 case 1.45x2.3x0.4 Inches (Please refer to outline drawing) WxLxH 36.8x58.4x10.2 mm Outline Dimensions (with baseplate) 1.45x2.3x0.5 Inches 36.8x58.4x12.7 mm Weight No baseplate 1.06 Ounces No baseplate 30 Grams With baseplate TBD Ounces With baseplate TBD Grams Through Hole Pin Diameter 0.04 & 0.062 Inches 1.016 & 1.575 mm Through Hole Pin Material Copper alloy TH Pin Plating Metal and Thickness Nickel subplate 100-299 µ-inches Gold overplate 3.9-19.6 µ-inches Baseplate Material Aluminum ENVIRONMENTAL Operating Ambient Temperature Range No derating, full power, 200 LFM, no condensation -40 85 °C Storage Temperature Vin = Zero (no power) -55 125 °C Thermal Protection/Shutdown Measured in center 105 110 125 ˚C Electromagnetic Interference External filter is required Conducted, EN55022/CISPR22 B Class Radiated, EN55022/CISPR22 B Class Relative humidity, non-condensing To +85°C 10 90 %RH Altitude must derate -1%/1000 feet -500 10,000 feet -152 3048 meters RoHS rating RoHS-6 www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 4 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters Notes ➀ Unless otherwise noted, all specifications apply over the input voltage range, full temperature ➆ The Sense pins are removed for the “X” model option. ➇ NOTICE—Please use only this customer data sheet as product documentation when laying out your range, nominal output voltage and full output load. General conditions are near sea level altitude, printed circuit boards and applying this product into your application. Do NOT use other materials as no base plate installed and natural convection airflow unless otherwise specified. All models are official documentation such as advertisements, product announcements, or website graphics. tested and specified with external parallel 1 µF and 10 µF multi-layer ceramic output capacitors. We strive to have all technical data in this customer data sheet highly accurate and complete. This No external input capacitor is used (see Application Notes). All capacitors are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be customer data sheet is revision-controlled and dated. The latest customer data sheet revision is normally on our website (www.murata-ps.com) for products which are fully released to Manufac- needed in the user’s application. turing. Please be especially careful using any data sheets labeled “Preliminary” since data may ➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is change without notice. Cin = 33 µF, Cbus = 220 µF and Lbus = 12 µH. The pinout (Pxx) and case (Cxx) designations refer to a generic family of closely related informa- ➂ All models are stable and regulate to specification under no load. ➃ The Remote On/Off Control is referred to -Vin. tion. It may not be a single pinout or unique case outline. Please be aware of small details (such as Sense pins, Power Good pins, etc.) or slightly different dimensions (baseplates, heat sinks, etc.) ➄ Regulation specifications describe the output voltage changes as the line voltage or load current which may affect your application and PC board layouts. Study the Mechanical Outline drawings, is varied from its nominal or midpoint value to either extreme. The load step is ±25% of full load Input/Output Connection table and all footnotes very carefully. Please contact Murata Power Solu- current. tions if you have any questions. ➅ Output Ripple and Noise is measured with Cout = 1µF MLCC paralleled with 10µF tantalum, 20 MHz oscilloscope bandwidth and full resistive load. HPQ-8.3/22-D48 PERFORMANCE DATA Efficiency vs. Line Voltage and Load Current @ Ta=+25˚C. (Vout = Vnom.) 100 98 96 94 92 90 88 VIN = 75 V 86 VIN = 48 V 84 VIN = 36 V 82 80 78 76 74 72 70 2 4 6 8 10 12 14 16 18 20 22 Iout (Amps) www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 5 of 14 Efficiency (%) HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters HPQ-8.3/22-D48 PERFORMANCE DATA (POWER VS. TEMPERATURE) These Maximum Power Temperature Derating graphs all mount the test converter on a 10˝ by 10˝ PC board in a calibrated wind tunnel. Measure- ments are performed near sea level altitude. A maximum junction temperature of +125˚C. is used. Transverse Airflow Longitudinal Airflow Maximum Power Temperature Derating vs. Airflow Maximum Power Temperature Derating vs. Airflow (Vin = 48V, airflow direction is from -Vin to +Vin, no baseplate) (Vin = 48V, airflow direction is from Vin to Vout, no baseplate) 200 200 180 180 160 160 100 LFM 140 140 100 LFM 200 LFM 200 LFM 120 300 LFM 120 300 LFM 400 LFM 400 LFM 100 100 80 80 60 60 40 40 20 20 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 (ºC) Ambient Temperature (ºC) Maximum Power Temperature Derating vs. Airflow Maximum Power Temperature Derating vs. Airflow (Vin = 48V, airflow direction is from -Vin to +Vin, with baseplate) (Vin = 48V, airflow direction is from Vin to Vout, with baseplate) 200 200 180 180 160 160 100 LFM 140 140 100 LFM 200 LFM 200 LFM 300 LFM 120 120 300 LFM 400 LFM 400 LFM 100 100 80 80 60 60 40 40 20 20 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 (ºC) Ambient Temperature (ºC) www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 6 of 14 Output Power (Watts) Output Power (Watts) Output Power (Watts) Output Power (Watts) HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters HPQ-8.3/22-D48 PERFORMANCE DATA (CURRENT VS. TEMPERATURE) These Maximum Current Temperature Derating graphs all mount the test converter on a 10˝ by 10˝ PC board in a calibrated wind tunnel. Measure- ments are performed near sea level altitude. A maximum junction temperature of +125˚C. is used. Transverse Airflow Longitudinal Airflow Maximum Current Temperature Derating vs. Airflow Maximum Current Temperature Derating vs. Airflow (Vin = 48V, airflow direction is from -Vin to +Vin, no baseplate) (Vin = 48V, airflow direction is from Vin to Vout, no baseplate) 24 24 22 22 20 20 18 18 100 LFM 100 LFM 16 200 LFM 16 200 LFM 300 LFM 300 LFM 14 14 400 LFM 400 LFM 12 12 10 10 8 8 6 6 4 4 2 2 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 (ºC) Ambient Temperature (ºC) Maximum Current Temperature Derating vs. Airflow Maximum Current Temperature Derating vs. Airflow (Vin = 48V, airflow direction is from -Vin to +Vin, with baseplate) (Vin = 48V, airflow direction is from Vin to Vout, with baseplate) 24 24 22 22 20 20 18 18 100 LFM 100 LFM 200 LFM 16 16 200 LFM 300 LFM 14 14 300 LFM 400 LFM 400 LFM 12 12 10 10 8 8 6 6 4 4 2 2 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 (ºC) Ambient Temperature (ºC) www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 7 of 14 Current (Amps) Current (Amps) Current (Amps) Current (Amps) HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters HPQ-8.3/22-D48 PERFORMANCE DATA Power On Startup Output Delay Power On Startup Output Delay (Vin = 0 to 48V, Iout=22A, Cload=0, Ta=+25˚C.) (Vin = 0 to 48V, Iout=0A, Cload=0, Ta=+25˚C.) Max = 81A, Period = 1.180s, Pulse width = 6.4ms Step Load Transient Response Step Load Transient Response (Vin = 48V, Resistive load, Cout=0, Iout=75% to 50% of Imax, Ta=+25˚C.) (Vin = 48V, Resistive load, Cout=0, Iout=50% to 75% of Imax, Ta=+25˚C.) Output Ripple and Noise Output Ripple and Noise (Vin = 48V, Iout=22A, Cload=1µF ceramic || 10µF tantalum, Ta=+25˚C., ScopeBW=20MHz) (Vin = 48V, Iout=0A, Cload=1µF ceramic || 10µF tantalum, Ta=+25˚C., ScopeBW=20MHz) www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 8 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters MECHANICAL SPECIFICATIONS (THROUGH-HOLE MOUNT) TOP VIEW TOP VIEW 47.24 ±0.20 1.860 ±0.008 M3 THREADED INSERT 4 PLACES SEE NOTE 1&2 58.4 56.13 2.30 2.210 Case C59 SIDE VIEW PINS 1-3,5-7: PIN S 1-3,5-7: φ0.040±0.001(1.016±0.025) 0.015 minimum clearance φ0.040±0.001(1.016±0.025) 0.015 minimum clearance PINS 4,8: between standoffs and between standoffs and PIN S 4,8: φ0.062±0.001(1.575±0.025) highest component highest component φ0.062±0.001(1.575±0.025) 50.80 50.80 2.000 2.000 4 4 3 3 5 5 2 6 2 6 7 7 1 8 1 8 58.4 2.30 OPEN FRAME (NO BASEPLATE) PIN SIDE VIEW WITH BASEPLATE OPTION, PIN SIDE VIEW ➀ M3 bolts must not exceed 0.138˝ (3.5mm) depth below the baseplate surface. ➁ Applied screw torque must not exceed 5.3 in-lb. (0.6 N-m). The standard pin length is shown. Please refer to the part number structure for alternate pin lengths. DOSA-Compliant I/O Connections (pin side view) Pin Function P32 Pin Function P32 Dimensions are in inches (mm shown for ref. only). 1 +Vin 5 –Sense* Third Angle Projection 2 Remote On/Off Control 6 Trim 3 –Vin 7 +Sense* 4 –Vout 8 +Vout * The Sense pins are removed for the “X” model option. Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 9 of 14 10.2 15.24 0.40 Max 0.600 LABEL 4.6 4.20 34.54 0.18 0.165 7.62 1.360 0.300 15.24 0.600 36.8 1.45 36.8 1.45 15.24 12.7 26.16 ±0.20 0.600 0.50 1.030 ±0.008 LABEL 7.62 0.300 15.24 0.600 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters a small ceramic capacitor is sufficient. Since it is difficult to totally characterize TECHNCIAL NOTES all applications, some experimentation may be needed. Note that external input Input Fusing capacitors must accept high speed switching currents. Certain applications and/or safety agencies may require fuses at the inputs of Because of the switching nature of DC-DC converters, the input of these power conversion components. Fuses should also be used when there is the converters must be driven from a source with both low AC impedance and possibility of sustained input voltage reversal which is not current-limited. For adequate DC input regulation. Performance will degrade with increasing input greatest safety, we recommend a fast blow fuse installed in the ungrounded inductance. Excessive input inductance may inhibit operation. The DC input input supply line. regulation specifies that the input voltage, once operating, must never degrade The installer must observe all relevant safety standards and regulations. For below the Shut-Down Threshold under all load conditions. Be sure to use safety agency approvals, install the converter in compliance with the end-user adequate trace sizes and mount components close to the converter. safety standard. I/O Filtering, Input Ripple Current and Output Noise Input Reverse-Polarity Protection All models in this converter series are tested and specified for input reflected If the input voltage polarity is reversed, an internal diode will become forward ripple current and output noise using designated external input/output compo- biased and likely draw excessive current from the power source. If this source nents, circuits and layout as shown in the figures below. External input capaci- is not current-limited or the circuit appropriately fused, it could cause perma- tors (Cin in the figure) serve primarily as energy storage elements, minimizing nent damage to the converter. line voltage variations caused by transient IR drops in the input conductors. Users should select input capacitors for bulk capacitance (at appropriate Input Under-Voltage Shutdown and Start-Up Threshold frequencies), low ESR and high RMS ripple current ratings. In the figure below, Under normal start-up conditions, converters will not begin to regulate properly the Cbus and Lbus components simulate a typical DC voltage bus. Your specific until the rising 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 TO CURRENT OSCILLOSCOPE restart will not occur until the input voltage rises again above the Start-Up PROBE Threshold. This built-in hysteresis prevents any unstable on/off operation at a +VIN LBUS single input voltage. + – VIN Users should be aware however of input sources near the Under-Voltage Shut- CBUS CIN + down whose voltage decays as input current is consumed (such as capacitor – inputs), the converter shuts off and then restarts as the external capacitor re- −VIN charges. Such situations could oscillate. To prevent this, make sure the operating CIN = 33µF, ESR < 200mΩ @ 100kHz input voltage is well above the UV Shutdown voltage AT ALL TIMES. CBUS = 220µF, 100V LBUS = 4.7µH Start-Up Delay Assuming that the output current is set at the rated maximum, the Vin to Vout Start- Figure 2. Measuring Input Ripple Current Up Delay (see Specifications) is the time interval between the point when the rising input voltage crosses the Start-Up Threshold and the fully loaded regulated output system configuration may require additional considerations. Please note that the voltage enters and remains within its specified regulation band. Actual measured values of Cin, Lbus and Cbus may vary according to the specific converter model. times will vary with input source impedance, external input capacitance, input volt- age slew rate and final value of the input voltage as it appears at the converter. 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 These converters include a soft start circuit to moderate the duty cycle of the as multiple external capacitors. Be sure to calculate component temperature PWM controller at power up, thereby limiting the input inrush current. rise from reflected AC current dissipated inside capacitor ESR. In figure 3, the The On/Off Remote Control interval from inception to Vout regulated assumes two copper strips simulate real-world printed circuit impedances between the that the converter already has its input voltage stabilized above the Start-Up power supply and its load. In order to minimize circuit errors and standardize Threshold before the On command. The interval is measured from the On com- tests between units, scope measurements should be made using BNC connec- mand until the output enters and remains within its specified regulation band. tors or the probe ground should not exceed one half inch and soldered directly The specification assumes that the output is fully loaded at maximum rated to the fixture. current. Floating Outputs Input Source Impedance Since these are isolated DC-DC converters, their outputs are “floating” with These converters will operate to specifications without external components, respect to their input. The essential feature of such isolation is ideal ZERO assuming that the source voltage has very low impedance and reasonable in- CURRENT FLOW between input and output. Real-world converters however do put voltage regulation. Since real-world voltage sources have finite impedance, exhibit tiny leakage currents between input and output (see Specifications). performance is improved by adding external filter components. Sometimes only These leakages consist of both an AC stray capacitance coupling component www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 10 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters 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. +VOUT CAUTION: If you exceed these Derating guidelines, the converter may have an SCOPE RLOAD C1 C2 unplanned Over Temperature shut down. Also, these graphs are all collected near Sea Level altitude. Be sure to reduce the derating for higher altitude. −VOUT Output Overvoltage Protection (OVP) This converter monitors its output voltage for an over-voltage condition using an on-board electronic comparator. The signal is optically coupled to the pri- C1 = 1µF mary side PWM controller. If the output exceeds OVP limits, the sensing circuit C2 = 10µF LOW ES will power down the unit, and the output voltage will decrease. After a time-out LOAD 2-3 INCHES (51-76mm) FROM MODULE period, the PWM will automatically attempt to restart, causing the output volt- Figure 3. Measuring Output Ripple and Noise (PARD) age to ramp up to its rated value. It is not necessary to power down and reset the converter for this automatic OVP-recovery restart. and a DC leakage resistance. When using the isolation feature, do not allow If the fault condition persists and the output voltage climbs to excessive levels, the isolation voltage to exceed specifications. Otherwise the converter may the OVP circuitry will initiate another shutdown cycle. This on/off cycling is be damaged. Designers will normally use the negative output (-Output) as referred to as “hiccup” mode. 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. Output Fusing The converter is extensively protected against current, voltage and temperature Minimum Output Loading Requirements extremes. However, your application circuit may need additional protection. In the These converters employ a synchronous rectifier design topology. All models extremely unlikely event of output circuit failure, excessive voltage could be applied regulate within specification and are stable under no load to full load conditions. to your circuit. Consider using an appropriate external protection. Operation under no load might however slightly increase output ripple and noise. Output Current Limiting Thermal Shutdown As soon as the output current increases to approximately its overcurrent limit, To protect against thermal over-stress, these converters include thermal the DC-DC converter will enter a current-limiting mode. The output voltage will shutdown circuitry. If environmental conditions cause the temperature of the decrease proportionally with increases in output current, thereby maintaining a DC-DC’s to rise above the Operating Temperature Range up to the shutdown somewhat constant power output. This is commonly referred to as power limiting. temperature, an on-board electronic temperature sensor will power down the unit. When the temperature decreases below the turn-on threshold, the Current limiting inception is defined as the point at which full power falls below converter will automatically restart. There is a small amount of hysteresis to the rated tolerance. See the Performance/Functional Specifications. Note prevent rapid on/off cycling. CAUTION: If you operate too close to the thermal particularly that the output current may briefly rise above its rated value. This limits, the converter may shut down suddenly without warning. Be sure to enhances reliability and continued operation of your application. If the output thoroughly test your application to avoid unplanned thermal shutdown. current is too high, the converter will enter the short circuit condition. Temperature Derating Curves Output Short Circuit Condition The graphs in this data sheet illustrate typical operation under a variety of condi- When a converter is in current-limit mode, the output voltage will drop as tions. The Derating curves show the maximum continuous ambient air temperature the output current demand increases. If the output voltage drops too low, the and decreasing maximum output current which is acceptable under increasing magnetically coupled voltage used to develop PWM bias voltage will also drop, forced airflow measured in Linear Feet per Minute (“LFM”). Note that these are thereby shutting down the PWM controller. Following a time-out period, the AVERAGE measurements. The converter will accept brief increases in temperature PWM will restart, causing the output voltage to begin rising to its appropriate and/or current or reduced airflow as long as the average is not exceeded. value. If the short-circuit condition persists, another shutdown cycle will initi- ate. This on/off cycling is called “hiccup mode.” The hiccup cycling reduces the Note that the temperatures are of the ambient airflow, not the converter itself average output current, thereby preventing excessive internal temperatures. which is obviously running at higher temperature than the outside air. Also note that “natural convection” is defined as very low flow rates which are not using Trimming the Output Voltage (See Specification Note 7) fan-forced airflow. Depending on the application, “natural convection” is usu- The Trim input to the converter allows the user to adjust the output voltage over ally about 30-65 LFM but is not equal to still air (0 LFM). the rated trim range (please refer to the Specifications). In the trim equations and circuit diagrams that follow, trim adjustments use a single fixed resistor Murata Power Solutions makes Characterization measurements in a closed connected between the Trim input and either Vout pin. Trimming resistors should cycle wind tunnel with calibrated airflow. We use both thermocouples and an have a low temperature coefficient (±100 ppm/deg.C or less) and be mounted infrared camera system to observe thermal performance. As a practical matter, www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 11 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters close to the converter. Keep leads short. If the trim function is not used, leave +VOUT the trim unconnected. With no trim, the converter will exhibit its specified output +VIN voltage accuracy. +SENSE There are two CAUTIONs to observe for the Trim input: CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the ON/OFF TRIM maximum output voltage OR the maximum output power when setting the trim. LOAD CONTROL R TRIM DOWN 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 -SENSE current limiting. If the power is exceeded for an extended period, the converter may overheat and encounter overtemperature shut down. –VIN –VOUT 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 Figure 5. Trim adjustments to Decrease Output Voltage using a Fixed Resistor input. Use shielding if needed. Trim Equations Remote On/Off Control 8.3V x (1+∆) 1 On the input side, a remote On/Off Control can be specified with either positive ( ) R in kΩ = 5.11 x - - 2 adj_up [ ] 1.225 x ∆ ∆ or negative logic as follows: V -8.3V out where ∆ = Positive: Models equipped with Positive Logic are enabled when the On/Off 8.3V pin is left open or is pulled high to +15Vdc with respect to –Vin. An internal bias current causes the open pin to rise to +Vin. Positive-polarity devices are 1 ( ) R in kΩ = 5.11 x - 2 adj_down disabled when the On/Off is grounded or brought to within a low voltage (see [ ] ∆ Specifications) with respect to –Vin. 8.3V -V out where ∆ = 8.3V Negative: Models with negative polarity are on (enabled) when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to Where Vout = Desired output voltage. Adjustment accuracy is subject to resis- –Vin. The device is off (disabled) when the On/Off is left open or is pulled high tor tolerances and factory-adjusted output accuracy. Mount trim resistor close to +15Vdc Max. with respect to –Vin. to converter. Use short leads. Note that “∆” is given as a small fraction, not a percentage. Dynamic control of the On/Off function should be able to sink the specified signal current when brought low and withstand specified voltage when brought +VOUT high. Be aware too that there is a finite time in milliseconds (see Specifications) +VIN 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. +SENSE There are two CAUTIONs for the On/Off Control: ON/OFF CAUTION: While it is possible to control the On/Off with external logic if you TRIM LOAD CONTROL R TRIM UP 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 -SENSE logic). The On/Off prefers to be set at approx. +15V (open pin) for the ON state, assuming positive logic. –VIN –VOUT CAUTION: Do not apply voltages to the On/Off pin when there is no input power voltage. Otherwise the converter may be permanently damaged. Figure 4. Trim adjustments to Increase Output Voltage using a Fixed Resistor www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 12 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters Remote Sense Input (See Specification Note 7) Contact and PCB resistance Sense inputs compensate for output voltage inaccuracy delivered at the load. losses due to IR drops This is done by correcting voltage drops along the output wiring such as mod- +VOUT +VIN erate IR drops and the current carrying capacity of PC board etch. Sense inputs I OUT also improve the stability of the converter and load system by optimizing the +SENSE control loop phase margin. Sense Current ON/OFF TRIM Note: The Sense input and power Vout lines are internally connected through LOAD CONTROL low value resistors to their respective polarities so that the converter can Sense Return operate without external connection to the Sense. Nevertheless, if the Sense -SENSE function is not used for remote regulation, the user should connect +Sense to I OUT Return +Vout and –Sense to –Vout at the converter pins. –VIN –VOUT Contact and PCB resistance The remote Sense lines carry very little current. They are also capacitively losses due to IR drops coupled to the output lines and therefore are in the feedback control loop to Figure 6. Remote Sense Circuit Configuration 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: +VCC [Vout(+) –Vout(-)] – [ Sense(+) – Sense(-)] ≤ 10% of Vout Output overvoltage protection is monitored at the output voltage pin, not the ON/OFF Sense pin. Therefore excessive voltage differences between Vout and Sense CONTROL together with trim adjustment of the output can cause the overvoltage protec- tion circuit to activate and shut down the output. –VIN Power derating of the converter is based on the combination of maximum out- put current and the highest output voltage. Therefore the designer must insure: (Vout at pins) x (Iout) ≤ (Max. rated output power) Figure 7. Driving the On/Off Control Pin (suggested circuit) Through-hole Soldering Guidelines Murata Power Solutions recommends the TH soldering specifications below when install- ing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. 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: Maximum Preheat Temperature 115° C. Maximum Pot Temperature 270° C. Maximum Solder Dwell Time 7 seconds For Sn/Pb based solders: Maximum Preheat Temperature 105° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 13 of 14 HPQ-8.3/22-D48 Series Isolated 22-Amp Quarter Brick DC-DC Converters Vertical Wind Tunnel Murata Power Solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airflow and heat dissipation analysis of power products. IR Transparent The system includes a precision low flow-rate anemometer, optical window Variable variable speed fan, power supply input and load controls, Unit under speed fan temperature gauges, and adjustable heating element. test (UUT) The IR camera monitors the thermal performance of the IR Video Unit Under Test (UUT) under static steady-state conditions. A Camera special optical port is used which is transparent to infrared wavelengths. Both through-hole and surface mount converters are soldered down to a 10"x 10" host carrier board for realistic heat absorption and spreading. Both longitudinal and trans- Heating verse airflow studies are possible by rotation of this carrier element board since there are often significant differences in the heat Precision dissipation in the two airflow directions. The combination of low-rate adjustable airflow, adjustable ambient heat, and adjustable anemometer Input/Output currents and voltages mean that a very wide 3” below UUT range of measurement conditions can be studied. The collimator reduces the amount of turbulence adjacent to Ambient the UUT by minimizing airflow turbulence. Such turbulence temperature influences the effective heat transfer characteristics and sensor gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly Airflow causing uneven overheating. collimator Both sides of the UUT are studied since there are different ther- mal gradients on each side. The adjustable heating element and fan, built-in temperature gauges, and no-contact IR camera mean that Figure 8. Vertical Wind Tunnel 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: 11 Cabot Boulevard, Mansfield, MA 02048-1151 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. Specifications are subject to change without notice. © 2017 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_HPQ-8.3-22-D48 Series.C01 Page 14 of 14