MFW2812D_10 INTERPOINT | Alldatasheet

Document overview

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Technical content

Features

  • –55°C to + 85°C operation
  • 19 to 40 VDC input
  • 50 V for 50 ms transient protection
  • Fully isolated
  • Fixed frequency switching
  • Remote sense on single models
  • Inhibit/sync function
  • Indefinite short circuit protection
  • Up to 84% efficiency mFw SeRIeS

70 WATTDC/DC COnVERtERs

28 VOl t Input

NOT RECOMMENDED FOR NEW DESIGNS Page 1 of 7 mFw Rev F 20100212 Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 • Redmond wA 98073-9705 425.882.3100 • power@crane-eg.com www.interpoint.com

derating Output pOwer/current and input vOltage recOmmended Operating cOnditiOns absOlute maximum ratings typical characteristics 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 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 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 temperatures are referenced to the temperature at the converter’s base- plate
  • 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. input Voltage range
  • 19 to 40 VDC continuous (see Derating) case operating temperature (tc)
  • –40°C to +85°C full power mFw SeRIeS

www.interpoint.com

Electrical Characteristics: 25°C Tc, 28 VdC Vin, 100% load, free run, unless otherwise specified. 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 4. Regulation effect on the negative dual output during the defined conditions. 5. Regulation effect on both dual outputs during the defined conditions. DUAL AnD tRIPLe OUtPUt mODeLS mFW2812d mFW2815d mFW2812T mFW2815T unIts paRaMEtER COnDItIOns MIn typ MaX MIn typ MaX MIn typ MaX MIn typ M aX Output V Ol t a gE Full lOaD MaIn — — — ±11.88 ±12 ±12.12 — — — ±14.85 ±15 ±15.15 4.95 5.05 5.10 4.90 4.95 5.05 VdC Dual Output CuRREnt1,2 VIn = 19 tO 40 MaIn — — — — 2.92 5.5 — — — — 2.33 4.4 — 4.0 10.0 — 1.67 4.2 — 4.0 10.0 — 1.33 3.33 A Dual Output pOwER1,2 MaIn — — — — 35 66.5 — — 70 — — — — 35 66.5 — — 70 — 20 50 — 20 50 — — 60 — 20 50 — 20 50 — — 60 Dual tOtal Output RIpplE Full lOaD bw ≤ 2 mHz MaIn — — — — 30 50 — — — — 30 50 — 50 85 — 50 85 — 50 85 — 50 85 mV p-p Dual lInE R Eg u l a tI On VIn = 19 tO 40 MaIn — — — — 10 25 — — — — 10 25 — 2 20 — 100 200 — 2 20 — 100 200 mV Dual lOaD R Eg u l a tI On3 nO lOaD tO Full MaIn — — — — 25 50 — — — — 25 50 — 5 20 — 480 600 — 5 20 — 300 450 mV Dual CROss R Eg u l a tI On4 Dual +pO = 3 w tO 35 w -pO = 35 w — 1.5 3.0 — 2.0 4.0 — 1.5 3.0 — 2.0 3.5 — — — — — — — — — — — — pO = 20 w tO 50 w -pO = 50 w tO 20 w CROss R Eg u l a tI On5 MaIn +pO = 33 w Dual +pO = 3 w tO 27 w -pO = 27 w tO 3 w — — — — — — — — — — — — — 2.3 6.0 — 5.4 9.0 — 2.3 5.0 — 5.0 7.0 MaIn +pO = 3 w tO 30 w Dual ±pO = 15 w Input V Ol t a gE 19 28 40 19 28 40 19 28 40 19 28 40 VdC Input CuRREnt nO lOaD — 75 90 — 30 35 — 75 90 — 30 35 — 60 110 — 30 35 — 60 110 — 30 35 mA InhIbItED Input RIpplE CuRREnt Full lOaD bw ≤ 10 mHz — 15 40 — 15 40 — 15 40 — 15 40 mA p-p EFFICIEnCy 80 83 — 80 83 — 80 84 — 80 84 — % staRtup DElay — 15 25 — 15 25 — 6 10 — 6 10 ms mFw SeRIeS www.interpoint.com

CalCulatIng MaXIMuM aMbIEnt tEMpERatuRE The mFW 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 dissi- pation (P dISS 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 = mFW2815d, 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 resis- tance 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 = mFW2805S, VIN = 28 VdC, P oUT = 45 W. thermal Resistance = 3°C / watt. Efficiency = 83.5% (From Figure 3) PdISS = (45 / 0.835) – 45 = 8.89 watts. From Figure 1 we can see that the maximum allowed am bient temper- ature is ap prox imately 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 approxi- mately 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 recom- mended 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 calcula - tions 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. Degrees Centigrade Watts 20° 40° 60° 80° 100° 120° 140° U=4 °C/W 3°C/W 2°C/ W U=0 °C/W Internal Power Dissipation (max) vs. Ambient Temperature FIGuRE 1 pin Out FIGuRE 2: PIN OuT See case L for dimensions. pin dual Output triple 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, 10 No Connection main (+5) output Squared corner indicates pin one. BOTTOM VIEW MFW 1 2 3 4 mFw SeRIeS www.interpoint.com

Typical Performance Curves: 25°C Tc , 28 VdC Vin, 100% load, free run, unless otherwise specified. FIguRE 3 10 20 30 40 50 60 70 40 V 28 V 19 V Efficiency (%) Output Power (Watts) MFW2812D Efficiency vs Line & Load FIguRE 5 10 20 30 40 50 60 70 40 V 28 V 19 V Efficiency (%) Output Power (Watts) MFW28512T Efficiency vs Line & Load 10 20 30 40 50 60 70 40 V 28 V 19 V Efficiency (%) Output Power (Watts) MFW2815D Efficiency vs Line & Load FIguRE 4 10 20 30 40 50 60 70 40 V 28 V 19 V Efficiency (%) Output Power (Watts) MFW28515T Efficiency vs Line & Load FIguRE 6 Input Voltage (Volts) 10 20 30 40 50 60 70 283R5S 2815S 2812S 2805S Output Power (Watts) Low Line Dropout vs. Load (50 mV drop) MFW Single Output Models FIguRE 7 FIguRE 8 10 20 30 40 50 60 70 MFW2815D MFW2812D MFW28512T MFW28515TInput Voltage (Volts) Output Power (Watts) Low Line Dropout vs. Load (50 mV drop) MFW Dual and Triple Output Models mOdel numbering key MFW 28 512 T / ES Base Model Input Voltage Output Voltage Screening Number of Outputs (D = dual, T = triple) (Main and Aux. Vout for triple models) (Standard screening has no designator in this position.) mFw SeRIeS www.interpoint.com

2.850 (72.39) 0.550 (13.97) 1.600 (40.64) 0.350 (8.89) 0.000 0.00 0.000 0.180 (4.57) (1.02 +0.18/-0.00) 0.595 max (15.11) 0.250 +0.05/-0.00 (6.35 +1.3/-0.0) 0.625 (15.88) 0.825 (20.96) 1.025 (26.04) 1.325 (33.66) 1.425 (36.20) 1.625 (41.28) 2.280 (57.91) (1.02 +0.13/-0.05) BOTTOM VIEW 12 3 4 Squared corner indicates pin one CASE L 0.141 dia. x 6 (3.58) 2.460 max (62.50) 3.20 max (81.3) 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 mFw SeRIeS www.interpoint.com

ST A N D A R D A N D /ES (N O N-QML) PR O D U C T S EN V I R O N M E N T A L SC R E E N I N G 1 test perFOrmed standard nOn-Qml2 /es nOn-Qml2 Pre-cap Inspection Method 2017, 2032 yes yes Temperature Cycle (10 times) Method 1010, Cond. B, -55°C to +125°C, ambient no yes Constant Acceleration Method 2001, 500 g no yes Burn-in Method 1015 3 96 hours no yes Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 and 4: +25°C case yes yes Hermeticity Test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10 -3) no no yes yes yes no Final visual inspection Method 2009 yes yes test methods are referenced to mIL-StD-883 as determined by mIL-PRF-38534. Notes: 1. refers to products that do not offer QmL screening. 2. Standard and /eS, non-QmL products, do not meet all of the requirements of mIL-PRF-38534. 3. Burn-in designed to bring the case temperature to the maximum case temperature of the product. Refer to the specific product information for the maximum case temperature. test methods are referenced to mIL-StD-883 as determined by mIL-PRF-38534. Notes: 1. refers to products that do not offer QmL screening. 2. Standard and /eS, non-QmL products, do not meet all of the requirements of mIL-PRF-38534. 3. Burn-in designed to bring the case temperature to the maximum case temperature of 85°C. mFw SeRIeS mFw Series DC/DC Converters, mFw Rev F 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