DC/DC Converters 28 Volt Input hr700 Series 70 Watt NOT RECOMMENDED FOR NEW DESIGNS Features • –40°C to + 85°C operation models VDC Output • 19 to 40 VDC input • 50 V for 50 ms transient protection dual • Fully isolated ±12 ±15 • Fixed frequency TRIPLE +5 & ±12 +5 & ±15 • Remote sense on single models • Inhibit/sync function • Indefinite short circuit protection • Up to 84% efficiency Size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm) See case L for dimensions. Weight: 140 grams typical Screening: Standard only. See screening table for more information. description HR700 Series DC/DC converters offer up to 70 watts of power from single, dual, or triple outputs in one package. The converters combine the small size and high reliability of hybrid-based components, the high efficiency of switching regulators, and the isolation, regulation, and low noise characteristics of linear regulators. small size The HR700 converters are manufactured using techniques that provide very small size and low profile components. Each converter uses less than eight square inches of board areas and is 0.595 inches high or less. The overall power density is 20 watts per cubic inch. high reliability Assembled using thick-film technology, the HR700 parts use the same manufacturing procedures and quality controls that we apply to converters designed for commercial airliners, the space shuttle, advanced fighter aircraft, and other high reliability applications. The steel cases are hermetically sealed in a dry nitrogen environment and are guaranteed a maximum leak rate of less than 10-3 atm-cc/sec. All devices are 100% electrically tested. high performance The HR700 series parts are high efficiency, low noise, pulse-width modulated converters which use a quasi-square wave forward converter design with a nominal switching frequency of 245 kHz. Isolation between input an output is provided with a transformer in the forward power loop and a wide band, temperature insensitive, optical link in the feedback control loop. Short circuit protection is Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 • Redmond WA 98073-9705 425.882.3100 • [email protected] www.interpoint.com provided by detecting peak primary switching current on a cycle basis and limiting it to approximately 130% of the full load input current. This method results in quick and positive current limiting under short circuit conditions. HR700 Series DC/DC converters are designed to provide full power operation over the input voltage range of 19 to 40 VDC. Operation below an input of 19 volts is possible with derated output power. Outputs are available as 5, 12, and 15 VDC single, dual and triple outputs. The converters typically provide greater than 80% efficiency over the entire input range. Line regulation is typically within 0.1% and load regulation within 0.2%. low noise The HR700 Series converters offer low noise on both the input and output lines. A two section, four pole, LC input filter is included to provide very low reflected line ripple current. Output ripple is maintained at less than 50 mV p-p for single and dual models and 85 mV p-p for triple output models. inhibit/sync feature An inhibit/sync pin is standard on all models of the HR700 Series converters. The pin serves as both an output inhibit and as a synchronization input. In the inhibit mode an open collector TTL compatible low (<0.8 V) will disable internal switching thereby inhibiting the unit’s output. Inhibiting in this manner results in an extremely low quiescent current. Page 1 of 7 HR700 Rev C - 20100212 DC/DC Converters absolute maximum ratings sync and inhibit Output Power •60 to 70 watts depending on model Lead Soldering Temperature (10 sec per lead) •300°C Storage Temperature Range (Case) •–55°C to +125°C Sync In (245 to 370 kHz.) •Duty cycle 70% min, 98% max. •Logic low 0.8V max •Logic high 4.5 V min •Referenced to input common •If sync is not used, leave unconnected Inhibit TTL Open Collector •Logic low (output disabled) Inhibit pin current 1 mA max •Referenced to input common •Logic high (output enabled) V = ≥ 4.5V recommended operating conditions Input Voltage Range •19 to 40 VDC continuous (see Derating) Case Operating Temperature (Tc) •–40°C to +85°C full power derating Output Power/Current and input voltage Temperatures are referenced to the temperature at the converter’s baseplate • Linearly derate output power/current from 100% at 85°C to 0% at 125°C. • Above 105°C linearly derate steady state input voltage to 33 volts at 125°C. • Indefinite short circuit protection is not guaranteed above 85°C case. • Operation below an input voltage of 19 volts, including operation in MIL STD-704E emergency power conditions, is possible with derated output power. See Figures 10 and 11. www.interpoint.com hr700 series 70 Watt Page 2 of 7 HR700 Rev C - 20100212 typical characteristics Output Voltage Temperature Coefficient •150 ppm/°C, typical Input to Output Capacitance •160 pF, typical Isolation •100 megohm minimum at 500 V Conversion Frequency •Free run mode 245 kHz, typical Inhibit Pin Voltage (unit enabled) •4.5 to 5.5 V DC/DC Converters hr700 series 70 Watt Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. dual and triple output models PARAMETER CONDITIONS output voltage output current1,2 line regulation cross regulation4 TYP MAX — 4.90 5.05 5.15 4.95 5.10 main — — — — — 2.92 main — — ±dual — total — main — dual — — — 30 5.5 — — — 66.5 — 70 — — — 100 — — — — 4.0 2.33 4.4 — 1.67 — — — 20 66.5 — 70 — — 100 35 — — 30 10.0 4.90 4.2 — 4.0 10.0 1.33 3.33 50 50 — 20 20 50 — 20 50 — 60 — — 60 — 50 100 — 50 100 — 50 100 — 50 100 2 25 — 2 25 100 225 — 100 225 5 30 — 5 30 main — — — — — — — dual — 10 30 — 10 30 main — — — — — — — dual — 25 50 — 25 50 — 300 600 — 300 600 — 1.5 3.0 — 1.5 3.0 — — — — — — — 2.0 4.0 — 2.0 3.5 — — — — — — — — — — — — — 2.3 6.0 — 2.3 5.0 — — — — — — — 5.4 9.0 — 5.0 7.0 19 28 40 19 28 40 19 28 40 19 28 40 100 — 100 — 115 — dual main +po = 33 w dual +po = 3 w to 27 w -po = 27 w to 3 w main +po = 3 w to 30 w dual ±po = 15 w input voltage input refl. ripple MAX MIN dual +po = 3 w to 35 w -po = 35 w input current TYP ±15.05 ±15.30 ±15.75 +po = 20 w to 50 w -po = 50 w to 20 w cross regulation5 hr703-28515 MIN ±11.50 ±11.80 ±12.10 — — hr703-28512 MAX ±14.75 ±15 ±15.25 35 — — TYP ±11.75 ±12 ±12.25 vin = 19 to 40 no load to full MIN — full load bw ≤ 2 MHz — hr702-2815 MAX main vin = 19 to 40 load regulation3 TYP dual full load output power1,2 output ripple hr702-2812 MIN 75 75 — no load — inhibited 85 85 115 — 25 35 — 25 35 — 30 35 — 30 35 full load bw ≤ 10 MHz — 15 50 — 15 50 — 15 50 — 15 50 UNITS VDC A W mV p-p mV mV % % VDC mA mA p-p efficiency 80 83 — 80 83 — 79 84 — 79 84 — % startup delay — 15 25 — 15 25 — 6 10 — 6 10 ms Notes 1.On dual output models the maximum combined output power is 70 watts. A maximum of 95% (66.5 W) is available from any single output. 2.On triple output models the maximum combined output power is 60 watts. A maximum of 50 watts is available from a single output. 3.Balanced loads www.interpoint.com 4.Regulation effect on the negative dual output during the defined conditions. 5.Regulation effect on both dual outputs during the defined conditions. Page 3 of 7 HR700 Rev C - 20100212 DC/DC Converters Thermal Management Calculating Maximum Ambient Temperature The HR700 Series of DC/DC converters has an upper operating temperature of + 85°C at the baseplate of the case. The degree of heat sinking required to remain within this limit may be determined from Figure 1 which shows the maximum allowed internal power dissipation (PDISS vs. ambient temperature for various heat sink thermal resistances. PDISS may be calculated as: PDISS = POUT / efficiency – POUT The efficiency for all combinations of POUT and VIN for the various models may be obtained from the graphs on the preceding pages. Example:Converter = HR702-2815, TAMB = 70°C, VIN = 28 VDC, POUT = 45 watts Efficiency = 85% (From Figure 7) PDISS = (45 / 85) – 45 = 7.95 watts From Figure 1 we can see that this situation will require thermal resistance of approximately 4.5°C / watt. Conversely we may also find the maximum ambient temperature which can be tolerated if we know the heat sink thermal resistance. Example:Converter = HR701-2805, VIN = 28 VDC, POUT = 45 W. Thermal Resistance = 3°C / watt. Efficiency = 83.5% (From Figure 3) PDISS = (45 / 0.835) – 45 = 8.89 watts. hr700 series 70 Watt From Figure 1 we can see that the maximum allowed ambient temperature is approximately 75°C. Heat Sink Recommendations An MFW Series converter in still air (other than convective currents) and with no conductive cooling paths other than through electrical connections at the pins will exhibit a thermal resistance of approximately 4°C / watt. In cases where this value proves to be too high it is recommended that additional heat sinking be supplied. The simplest method of accomplishing this is to firmly attach the converter to a PCB thereby providing a conductive thermal path. Secondly it is recommended that airflow be provided over the converter. Although each situation requires a thorough thermal analysis these two measures can reduce the thermal resistance to as low as 2°C / watt. If calculations indicate further heat sinking is required it is recommended that additional thermal mass be provided either under the base plate or on top of the converter’s mounting flanges or both. PIN OUT 20 W /W C/W °C/W °C/ 4°CU=3° U=2 U=0 U= Watts 15 10 5 PinDual OutputTriple Output 1 Positive Input Positive Input 2 Case Ground Case Ground 3 Input Common Input Common 4 Inhibit/Sync In Inhibit/Sync In 5 Negative Output Neg. Aux. Output 6 Positive Output Positive Aux. Output 7, 8 Output Common Output Common 9, 10No Connection Main (+5) Output Squared corner indicates pin one. 20° 40° 60° 80° 100° 120° 140° Degrees Centigrade Internal Power Dissipation (max) vs. Ambient Temperature Figure 1 1 2 3 4 BOTTOM VIEW MFW See case L for dimensions. 9 7 5 10 8 6 Figure 2: Pin Out www.interpoint.com Page 4 of 7 HR700 Rev C - 20100212 DC/DC Converters hr700 series 70 Watt Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 87 19 V 85 83 83 83 81 79 28 V 77 75 40 V 81 79 28 V 77 75 40 V 73 71 EFFICIENCY (%) 85 73 30 40 50 60 10 20 30 40 50 60 75 40 V 20 HR702-2815 EFFICIENCY VS. LINE & LOAD 40 50 60 70 HR703-28512 EFFICIENCY VS. LINE & LOAD Figure 4 Figure 3 30 OUTPUT POWER (WATTS) HR702-2812 EFFICIENCY VS. LINE & LOAD Figure 5 19 83 81 28 V 77 75 40 V INPUT VOLTAGE (VOLTS) 19 V 85 73 28 V 77 10 OUTPUT POWER (WATTS) 79 79 70 OUTPUT POWER (WATTS) 87 81 71 70 HR702-2815 18 HR701-2815 INPUT VOLTAGE (VOLTS) 20 19 V 73 71 10 EFFICIENCY (%) 87 19 V 85 EFFICIENCY (%) EFFICIENCY (%) 87 17 HR701-2812 16 HR701-2815 15 18 HR702-2812 17 HR703-28512 HR703-28515 16 15 71 10 20 30 40 50 60 10 70 20 30 40 50 60 70 10 OUTPUT POWER (WATTS) OUTPUT POWER (WATTS) Figure 6 model numbering key Base Model HR70 2 - 28 Number of Outputs (2 = dual, 3 = triple) Input Voltage Output Voltage (Main and aux. Vout for triple models) www.interpoint.com 40 50 60 Figure 8 Figure 7 Figure 9 30 70 LOW LINE DROPOUT VS LOAD (50mV DROP) LOW LINE DROPOUT VS LOAD (50mV DROP) HR703-28515 EFFICIENCY VS. LINE & LOAD 20 OUTPUT POWER (WATTS) Page 5 of 7 HR700 Rev C - 20100212 12 DC/DC Converters hr700 series 70 Watt CASE L Squared corner indicates pin one Solder Seal 3.20 max (81.3) 0.141 dia. x 6 (3.58) 2.850 (72.39) 1 .0.040 +0.005/-0.002 (1.02 +0.13/-0.05) 2 3 4 BOTTOM VIEW 1.600 (40.64) Solder Tip-off 9 7 5 10 8 6 0.550 (13.97) 0.350 (8.89) Case dimensions in inches (mm) Tolerance ±0.005 (0.13) for three decimal places ±0.01 (0.3) for two decimal places unless otherwise specified CAUTION Heat from reflow or wave soldering may damage the device. Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin Materials Header Cold Rolled Steel/Nickel/Tin Cover Cold Rolled Steel/Nickel/Tin Pins #52 alloy pins 1-4, and 9-10 #52 alloy with copper core pins 5-8, ceramic seal Case L, Rev C, 20060803 Please refer to the numerical dimensions for accuracy. All information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. Copyright © 1999-2006 Interpoint Corp. All rights reserved. Figure 9: Case l www.interpoint.com Page 6 of 7 HR700 Rev C - 20100212 2.280 (57.91) 2.460 max (62.50) 1.625 (41.28) 1.325 (33.66) 1.425 (36.20) 1.025 (26.04) 0.825 (20.96) 0.625 (15.88) 0.00 0.180 (4.57) 0.250 +0.05/-0.00 (6.35 +1.3/-0.0) 0.000 0.040 +0.007/-0.000 (1.02 +0.18/-0.00) 0.595 max (15.11) 0.000 DC/DC Converters hr700 series 70 Watt HR INDUSTRIAL (STANDARD, NON-QML) PRODUCTS ENVIRONMENTAL SCREENING hr industrial standard nOn-Qml1 test perFOrmed Pre-cap Inspection Method 2017, 2032 yes Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 and 4: +25°C case yes Hermeticity Test Gross Leak, Dip (1 x 10-3) yes Final visual inspection Method 2009 yes TestmethodsarereferencedtomIL-STD-883asdeterminedbymIL-PRF-38534. Notes: 1.Standard,non-QmLproducts,donotmeetalloftherequirementsofmIL-PRF-38534. HR700 Series DC/DC Converter, HR700 Rev C - 20100212. This revision supersedes all previous releases. All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. HR700 Series is a trademark of Interpoint. Copyright © 1999 - 2010 Interpoint Corporation. All rights reserved. www.interpoint.com Page 7 of 7