models vdc o utput single 5 12 15 dual ? 2 ? 5 description the mhe series dc/dc converters offer the high efficiencies associated with switching regulators, yet have full isolation and the excellent regulation typical of linear regulators. no external compo - nents are required for operation. mhe series converters are built using thick-film hybrid technology, and are sealed in metal packages for military, aerospace, and other high-reliability applications. unscreened models are solder sealed and are guaranteed to passa gross leak test (maximum leak rate of 1 x 10 -3 atm.-cc/sec). environmentally screened models are hermetically sealed and are screened as described in section c2. the mhe series converters are pulse-width modulated switching regulators operating in the forward mode, with a nominal switching frequency of 125 to 140 khz. isolation is achieved through the use of a transformer in the forward power circuit, and an optocoupler is used in the feedback/control loop. the full load output power is available over the full input voltage range. short-term transients of 50 volts will not impair normal operation for 28 volt input models. the efficiency is typically greater than 80% over the entire input voltage range and from approximately 25% of full load to full load. this feature makes the mhe series converters ideal for either battery or aircraft power applications. an inhibit function is provided on mhe series converters to allow power shutdown and startup from a logic input. the unit is inhibited when the inhibit input pin (pin 2) is connected to the input common (pin 10). the open circuit voltage of the inhibit pin is 8 to 10 vdc for 12 v input models or 11 to 13 vdc for 28 v input models. during inhibit, the input inhibit pin must sink approximately 1 ma. in the inhibit mode, converter output drops to less than 1 v and the input current is typically 8 ma. automatic current limiting circuitry protects the mhe series converters against short circuits. mhe series converters are rated to operate at full load up to a case temperature of 85?, with the output power derated linearly to zero at 115?. because of the unit s high efficiency, heat sinking require- ments are minimized, but due consideration should be given to removing self-generated heat when operating the device at maximum ratings. t o increase dissipation, heat conducting material (pcb, copper sheet, heat sink, etc.) should be brought into contact with the converter s baseplate. when the mhe series converters are used in applications requiring full power operation for extended periods of time, or in shock and vibration environments, it is highly recommended that the flange- mount option be used. this option provides improved thermal transfer capabilities as well as a mechanically secure mounting configuration. dc/dc c onverters 12 and 28 v olt i nput mhe series 20 wat t 1 size (max.): non-flanged 2.125 x 1.125 x 0.495 (case h6) inches ( 53.98 x 28.58 x 12.57 mm) flanged 2.910 x 1.125 x 0.495 (case k7) inches (73.91 x 28.58 x 12.57 mm) see section b8, cases h6 and k7, for dimensions. weight: 50 grams typical screening: standard or es. see section c2 for screening options, see section a5 for ordering information. f eatures ?5? to +85? operation 10 to 16 vdc input or 16 to 36 vdc input typical fully isolated opto-coupler feedback fixed frequency 125 khz typical topology ?push-pull forward transient protection 50 v for up to 50 ms 28 vin models inhibit function indefinite short circuit protection trimmable output on single models up to 83% efficiency
typical characteristics absolute maximum ratings recommended operating conditions inhibit output power 10 to 20 watts depending on model lead soldering temperature (10 sec per lead) 300? storage temperature range (case) ?5? to +125? 2 mhe series 20 watt dc/dc c onverters output voltage temperature coefficient 150 ppm/?, typical input to output capacitance 60 pf, typical current limit 125% of full load, typical isolation 100 megohm minimum at 500 v conversion frequency 125 khz, typical inhibit pin voltage (unit enabled) 11 to 13 v mhe28xxx 8 to 10 v mhe12xxx i nput voltage range c ontinuous 17 to 40 vdc mhe28xxx 10 to 16 vdc mhe12xxx t ransient 50 v for 50 msec on 28 v input models case operating temperature (tc) ?5? to +85? full power derating output power/current linearly from 100% at 85? to 0% at 115 c mhe28xxx models derate by 33% at 16 vin inhibit ttl open collector logic low (output disabled) logic low voltage 0.8 v referenced to input common logic high (output enabled) open collector electrical characteristics: 25 c tc, 28 vdc vin, 100% load, unless otherwise specified. single output mhe12xx models mhe1205s mhe1212s mhe1215s parameter condition min typ max min typ max min typ max units output voltage 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 vdc output current ?5? to +85? 3 1.25 1.0 a output power ?5? to +85? 15 15 15 w output ripple vol t age 0 to 1 mhz 35 70 35 70 35 70 mv p-p line regulation v in min to max 2 5 3 10 3 10 mv load regulation no load to full 10 20 5 15 10 20 mv input voltage continuous 10 12 16 10 12 16 10 12 16 vdc transient 50 ms v input current no load 24 32 32 ma input ripple current 10 khz ?2 mhz 30 80 30 80 30 80 ma p-p efficiency 78 81 79 82 80 83 % note: 1. guaranteed by design, not tested.
3 mhe series 20 watt dc/dc c onverters note 1. guaranteed by design, not tested. 2. on dual output models at least 25% of the load should be on the positive output. electrical characteristics: 25? tc, 28 vdc vin (12 vin for 12 v models), 100% load, unless otherwise specified. single and dual mhe28xx models mhe2805s MHE2812S mhe2815s mhe2812d mhe2815d parameter conditions min typ max min typ max min typ max min typ max min typ max units output voltage 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 11.88 12.00 12.12 14.85 15.00 15.15 vdc output current 2 ?5 to +85? 3.0 1.67 1.33 0.63 0.5 a output power 2 ?5 to +85? 15 20 20 15 15 w output ripple voltage 0 - 1 mhz 35 60 60 80 30 60 30 50 30 50 mv p-p line regulation v in min to max 2 10 3 10 3 10 3 12 3 15 mv load regulation no load to full 10 20 5 15 5 15 5 15 5 15 mv input voltage continuous 17 28 40 17 28 40 17 28 40 17 28 40 17 28 40 vdc transient 50 ms 50 50 50 50 50 v input current no load 18 30 30 35 35 ma input ripple current 10 khz - 2 mhz 20 50 25 50 25 50 25 50 25 50 ma p-p efficiency 78 81 79 82 80 83 76 79 76 79 %
output adjustment resistor values for mhe2805s and mlp2805s 4 mhe series 20 watt dc/dc c onverters model numbering key p in out pin single output dual output 1 positive input positive input 2 inhibit inhibit 3 output adjust positive output 4 output common output common 5 positive output negative output 6 no connection no connection 7 no connection no connection 8 case ground case ground 9 no connection no connection 1 0 input common input common see section b8, case h6 and k7 for dimensions. output adjustment all single output models: the output can be adjusted upward by using the output adjust (pin3). the resistance between output adjust (pin 3) and output common (pin 4) will determine the magnitude of the increase in the output. the table above is applicable only to mhe2805s. resistance output v oltage pin 3 to 4 increase (%) 0 390k +1% 145k +2% 63k +3% 22k +4% 0 +5% f igure 1: p in o ut mhe series rev d 20060630 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 spec - ifications without notice. mhe series is a trademark of interpoint corporation. copyright 1995 - 2006 interpoint corporation. all rights reserved. m he 28 12 s f / es b ase model input voltage output voltage screening number of outputs case option (non-flanged case has no designator in
this position) (s = single, d = dual) (standard screening has no designator
in this position.) b ottom view m he s quared corner and dot on t op of cover indicate pin one. d otted line outlines flanged package option. 12 6 10 345 7 8 9
b8-17 case h c ases case h bottom view see figures 29 ?34 for pin configurations. 2.125 max (53.98) 1.125 max (28.58) materials header cold rolled steel/nickel/gold cases h1 and h2 cold rolled steel/nickel/tin cases h3, h4, and h5 cover kovar/nickel cases h1 and h2 cold rolled steel/nickel/tin cases h3, h4, and h5 pins #52 alloy ceramic seal case h1 case h2 (except mhv series single and dual) compression glass seal mhv series single and dual case h3, h4, h5 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. dot on top of case indicates pin one 0.155 (3.94) 0.955 (24.26) seam seal 0.000 0.040 dia (1.02) 0.000 0.000 0.400 max. (10.16) 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.110 (28.19) 12 3 4 5 fmc emi filter: screening e standard, es, or 883 sfmc emi filter: screening e space standard, h, or k bottom view case h1 squared corner and dot on top of case indicate pin one. f igure 29: c ase h1 f igure 28: c ase h m aximum d imensions note: although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. please refer to the numerical dimensions for accuracy.
b8-21 case h c ases 0.160 (4.06) 0.960 (24.38) solder seal solder tip-off 0.000 0.040 dia (1.02) 0.000 0.000 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) 0.560 (14.22) 0.255 (6.48) 1.855 (47.12) 2.110 (53.59) 1.120 (28.45) 12 4 5 fma-461and fmb-461 emi filter: screening ?standard of es bottom view case h5 0.495 max (12.57) squared corner and dot on top of case indicate pin one. 3 0.160 (4.06) 0.960 (24.38) 0.655 (16.64) 1.055 (26.80) 1.455 (36.96) 0.000 0.000 0.255 (6.48) 1.855 (47.12) 2.110 (53.59) 1.120 (28.45) 12 6 10 mhe series: screening ?standard or es bottom view case h6 345 7 8 9 0.040 dia (1.02) 0.25 +0.05/-0.00 (6.4 +1.3/-0.0) solder seal solder tip-off 0.000 0.495 max (12.57) dot on top of case indicates pin one hr151 series and hr152 series: no screening options f igure 34: c ase h6 f igure 33: c ase h5
b8-26 case k c ases materials header case k1 - k3 cold rolled steel/nickel/gold cases k4 - k8 cold rolled steel/nickel/tin cover case k1 - k3 kovar/nickel case k4 - k8 cold rolled steel/nickel/tin pins #52 alloy (all cases) case k1, k2, and k3 (except mhv series single and dual) ceramic seal cases k4 - k8 and mhv series single and dual (k3) compression glass seal case dimensions in inches (mm) tolerance 0.005 (0.13) for three decimal places 0.01 (0.2) for two decimal places unless otherwise specified case k bottom view see figures 42 - 48 for pin configuration 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. flange thickness: cases k1, k2, k3 and mlp series (k5) 0.060 (1.52) cases k4, k5 (except mlp series), k6, k7, and k8 0.067 +0.005/-0.007 (1.70 +0.13/-0.8) 1.125 max (28.58) 2.910 max (73.91) dot on top of case indicates pin one f igure 41: c ase k m aximum d imensions
b8-30 case k c ases 0.155 (3.94) 0.955 (24.26) 0.000 0.040 dia (1.02) 0.000 0.000 0.25 0.03 (6.4 0.8) 0.555 (14.1) 0.245 (6.22) 1.845 (46.86) 2.090 (53.01) 1.115 (28.32) 12 4 5 flanged cases: designator required in case option position of model number. fma-461 and fmb-461 emi filters: screening e standard or es bottom view case k6 0.162 dia (4.11) 0.230 (5.84) 2.320 (58.93) solder seal solder tip-off 0.495 max (12.57) squared corner and dot on top of case indicate pin one. 3 f igure 47: c ase k6 0.155 (3.94) 0.955 (24.26) 0.000 0.25 0.03 (6.4 0.8) 0.040 dia (1.02) solder seal solder tip-off 0.495 max (12.57) 0.000 0.000 0.245 (6.22) e 0.230 (5.84) 1.845 (46.86) 2.320 (58.93) 1.115 (28.32) 12 6 10 flanged case: designator required in case option position of model number. mhe series: screening e standard or es bottom view case k7 345 7 8 9 0.645 (16.38) 1.045 (26.54) 1.445 (36.70) 0.555 (14.1) squared corner and dot on top of case indicate pin one. f igure 48: c ase k7
c2-12 qa screening 85?c products test (85?c products excluding hr products) standard /es pre-cap inspection method 2017 yes yes temperature cycle (10 times) method 1010, cond. b, -55?c to 125?c no yes constant acceleration method 2001, 500 g no yes burn-in 96 hours at 70?c ambient (typical) no yes final electrical test mil-prf-38534, group a subgroups 1 and 4: +25?c case yes yes hermeticity testing fine leak, method 1014, cond. a no yes gross leak, method 1014, cond. c no yes gross leak, dip (1 x 10 -3 ) yes no final visual inspection method 2009 yes yes test methods are referenced to mil-std-883 as determined by mil-prf-38534. mfw series mtw series mhe serie s mrh series mto series msr series fm/fma/fmb emi filters msf emi filter 85? p roducts applies to the following products:
|
