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www.irf.com 1 high reliability radiation hardened quad output dc-dc converter mah-series description total dose > 100 krad(si) see > 82 mev . cm 2 /mg low weight < 90 grams dc input ranges can be accommodated within an overall range from 20v to 100v o/p 1: +5.0v (up to 630ma) o/p 2: +5.0v (up to 530ma) o/p 3: -8.0v (up to 40ma) o/p 4: +12v (up to 60ma) output ripple: < 1mvrms (100hz - 50mhz) cs rejection input to outputs: > 90db (50hz - 1.0mhz) 10m ? @ 100vdc isolation input under-voltage protection meets conducted emission requirements of major power buses: 100hz - 100khz: 80dbuarms 100khz - 10mhz: -20db/decade 10mhz - 50mhz: 40dbuarms short circuit and overload protection meets derating requirements of eee-inst 002 and ecss-q-st-30-11 isolated on/off control via high level pulse command (latching relay) on/off status telemetry (relay contact type) output status telemetry (bi-level) temperature telemetry (thermistor) workmanship per ipc-a610 class 3 board is coated with arathane-5750 features nominal voltage input, quad output the mah-series of isolated dc-dc converters for space applications are low to medium power radiation hardened high reliability devices designed for hostile radiation environments such as those encountered by geostationary earth orbit satellites, deep space probes and communication systems. features include small size, high efficiency, low weight, and a good tolerance to total ionizing dose, single event effects, and environmental stresses such as temperature extremes, mechanical shock, and vibration. all components are fully derated to meet the requirements of eee-inst- 002 (nasa) and ecss-q-st-30-11 (esa). extensive documentation including worst case analysis, radiation susceptibility, thermal analysis, stress analysis, and reliability analysis are available. the mah-series converter has four outputs ? three positive and one negative - each is independently regulated via linear post regulators. the outputs are sequenced during turn-on and turn-off such that the negative output comes up first at turn-on and stays up at turn-off until the positive outputs have decreased. the mah-series converters incorporate a fixed frequency flyback power converter and internal emi filter that meets the requirements for most major satellite power buses. the converter includes input under voltage shut-down functionality. due to the linear post regulation of the outputs, the mah- series is well suited for use in rf-applications where low noise, high output voltage accuracy, and high cs attenuation is required. each converter is provided as a complete board assembly for installation into the host equipment chassis. the board is conformal coated (except for mating surfaces) and is mounted in the host chassis using screws. the board outline is l x w x h: (85mm x 71mm x 18mm). the weight is less than 90 grams. non-flight versions of the mah-series converters are available for system development purposes. variations in electrical specifications and screening to meet custom requirements can be accommodated receivers, beakons, frequency up and applications low to medium power rf systems (like down converters) on-board satellites pd-97814
2 www.irf.com mah-series (nominal voltage input, quad output) fig 1- block diagram circuit description electrical design description general output power is limited under any load fault condition to approximately 120% of rated output (for output 4 approximately 150%). an overload condition on positive outputs 2 and 4 causes the converter output to behave like a constant current source with the output voltage dropping below nominal. an overload condition at the negative output causes the positive outputs to shut-down in order to protect rf-transistors in the load. an overload on the positive output 1 result in hick-up operation of the positive outputs but sequencing with the negative output is respected. the converter will resume normal operation when the load current is reduced below the current limit point. an under-voltage protection circuit prohibits the converter from operating when the line voltage is too low for safe operation. in case of an under voltage event the converter will not start when the input voltage returns to its nominal level before an off-command followed by an on-command has been issued. the isolated on/off telecommand is made with a latching relay and is intended for use with a 12v or 26v pulse command. input filter the converter is supplied from the primary bus through an input filter. the input filter selected is a second order resistively damped filter. the filter is chosen in order to provide sufficient damping of the ripple current towards the bus and the ripple voltage towards the converter. as baseline for the filter dimensioning ce limit at 80dbuarms up to 100khz decreasing to 40dbuarms at 10mhz, continuing at 40db above 10mhz has been used. the input filter capacitors are non-redundant ceramic capacitors. the input bus is not protected from s/c faults from the primary side in the converter - protection element assumed implemented upstream the dc-dc converter. the bus is protected from failures on the secondary side by a primary current limiter and over current protection in the linear post regulators. due to the overload protection on the outputs, failure propagation from the output to the input bus, through the converter, is not possible. input filter fly-back trans - former rectifier rectifier & filter linear regulator rectifier & filter sequen - cing hold up capacitor bank rectifier & filter fly-back power switch pwm controller uvp monitor & latch latching relay current shunt linear regulator negative linear regulator on primary power bus tc on tc off on /off status tm dis able int.supply v1 v2 v3 pok int. supply status detection rectifier & filter linear regulator v4 enable low voltage supply off hold-up capacitors common uvp sense uvp sense output status telemetry o/p tm temp. tm thermistor temperature tel emetry
www.irf.com 3 mah-series (nominal voltage input, quad output) the interface circuit for the input filter is given in the diagram shown in fig. 2. fig 2 - inerface schematic for input filter fly-back converter the fly-back converter supplying all the outputs is built up around a standard uc1845a pwm controller. the switching element is a radiation hardened mosfet from international rectifier in to-39 package. the main transformer is a standard rm6 core. when the converter is commanded on and is up and running it supplies itself from an extra winding on the power transformer in order to maintain a reasonable efficiency. the converter operates in current mode control; hence it includes inherently a primary current regulation and primary current limitation. regulation is performed on the internal auxiliary supplying the pwm controller. the fly-back provides four outputs for supplying the functional outputs for the dc-dc. each output uses diode rectification and is filtered by use of solid tantalum capacitors. outputs 1 & 2 have an option for a filter at the inner side of the linear regulator and output 1 has also this option at the outside side of the linear regulator. this is to ensure that the converter ripple is removed to the maximum extent possible before entering the noise sensitive areas of the rf-equipment. the switching frequency is fixed and in the range 80khz to 160khz depending on the specific version of the mah-series. tc, tc status, primary under-voltage and start-up the dc-dc includes a galvanic isolated telecommand interface. the interface is made with a latching relay in a t0-5 package. free-wheeling diodes are implemented across the on and off coil to protect from inductive kick-back. the relay controls on/off switching of the converter by controlling the pwm controller supply voltage. the relay switches only the pwm controller supply voltage (approximately 15v). the relay contacts do therefore not see the full bus voltage. l3 l2 r1 c8 c6 r4 c9 c7 c1

l1 cr2 cr1 c5
c4
4 www.irf.com mah-series (nominal voltage input, quad output) fig 3 - interface schematic for telecommand interface with on/off status telementry the telemetry is provided as an on/off status telemetry, this telemetry is provided as an extra set of contacts on the relay. when the dc-dc converter is commanded off the relay contacts will be open circuit offering more than 10mohm resistance and when the dc-dc is commanded on the contacts will be closed presenting a low well-defined resistance. series diodes are included as an option in the design to ensure compliance to most satellite tm/tc subsystems. the input uvp circuit senses the bus voltage and compares it to the input uvp-threshold. if the input voltage is below the limit, the circuit gives shut down signal to the pwm. the uvp shut down function can be configured to be either latching or with automatic re-start. this configuration is set by manufacturer (not user changeable after product delivery). in case of latching uvp in the event of an uvp, the dc-dc will continue to be off when the input bus returns to its normal range; the trip condition is reset by issuing an off command followed by an on-command. the uvp trig level includes hysteresis for proper operation. linear regulators linear post regulators are used for the outputs to comply with the strict requirements for voltage precision, noise, ripple, and cs rejection. the linear post regulator is under normal load conditions operating in voltage mode with a high control bw. in case of an overload condition the current control loop will take over providing a constant current limitation. both the voltage and the current loop are based on discrete components, a standard quad op-amp (two amplifiers per linear regulator) and bipolar junction transistors as pass elements. the interface circuit for the on/off relay circuit is given in in fig 3. on off tc on tc on return tc off return tc off status tm status tm return output 1 (high current) and the low current output (output 4) has been realized slightly different compared to outputs 2 and 3. for the low current output the current limit is achieved by using a transistor to clamp the current this method is less accurate but as this output only carries 30ma this inaccurate current limit can be thermally controlled. for output 1 with up to 1.5a output current the serial pass element is a mosfet (irhf57034) in order to limit the voltage drop at the high output current. the voltage loop is built around an op-amp. this regulator does not include current limitation instead the current limiter is provided by the current limit of the flyback by the pwm used to control the flyback. the current limit will be constant down to a certain output voltage level where the flyback will start to enter a hick-up mode. output sequencing is maintained also in case of overload for output 1. all other outputs will have a constant current limitation.
www.irf.com 5 mah-series (nominal voltage input, quad output) with careful design of the control circuits and board layout a very high cs attenuation for the combination of fly-back converter and linear regulators is achieved, typically >100db. the linear regulators also provide high attenuation of the ripple from the fly-back converter giving a low output ce (typically < 0.25mvrms) at the switching frequency. this is obtained even with headroom <1v, hereby a reasonable efficiency for the overall converter can be offered. the linear regulators also ensure very high output accuracy better than 2% at worst case eol conditions including initial setting, line- and load regulation, temperature variations, ageing, and radiation degradation. output telemetry a bi-level status telemetry can be derived from either output 1 or output 2. implementation is using a voltage divider with filtering directly from the positive output selected (selection by manufacturer ? not user selectable after delivery). timing / sequencing the linear regulators provide most of the architecture needed to provide timing between the outputs. at turn on the negative output will come up first. when the negative output is present and in regulation it releases the positive outputs which hereafter slowly rises. at turn off the positive outputs will stop when the fly-back converter stops, and a small hold up circuit on the negative output ensures that the negative output keeps running after the positive outputs have been discharged by the load. also if the negative output is shorted the positive outputs will immediately be stopped. all done to ensure safe operation of the rf-electronics which often includes normally-on devices that requires presence of negative bias prior to applying positive voltages.

fig 4 - interface schematic for output status telementry temperature telemetry a thermistor is included in the design to provide temperature telemetry. fig 5 - interface schematic for the temperature telementry

ther mistor ysi 44907
6 www.irf.com mah-series (nominal voltage input, quad output) mechanical design the dc-dc is considered a module forming part of the complete host equipment. the dc-dc is ?open board? ready for installation into the host equipment housing. the dc-dc is delivered complete with input connections formed as solder pins and output solder terminals ready for installation with screws into the host equipment housing. the board is equipped with 8 mounting holes for m2 screws that serve as mechanical fixation, thermal path, and electrical return connection. the screw positions are hence a result of the mechanical design as well as the thermal analysis and emc considerations. the outline of the board is (l x w x h): 85mm x 71mm x 18mm. the mass is less than 90g. the input bus voltage, telecommand, and status telemetry is provided by 15 wrap around pins supported by a plastic socket. the input pin section is placed in a grid similar to a d-sub connector thus it is possible to offer a solution with a 15p d-sub connector for the input power and tm/tc signals (in which case the mass increases 15g). the output pins are provided using solder pads. the output pad section contains 8 pads allowing access to the outputs from both sides of the board. the dc-dc converter is conformal coated (except on mating surfaces). vibrational performance in order to limit the pcb deflections which are critical with respect to fatigue failures of component leads, the basic eigen frequency is approximately 1150hz. the component mechanical mounting techniques are based upon standards used for similar equipment. components with need of mechanical support with no natural mounting possibility (axial capacitors, br40 capacitors, rm cores etc.) are supported with a two-component epoxy glue (ec2216). the construction does not include individual components with very high mass hence a distributed fixation of the pcb into the mechanical housing with m2x5 steel screws is satisfactory. thermal design the dc-dc converter will keep temperature derating as per eee-inst-002 and ecss-q-st-30-11 up to an interface temperature at the mounting points of +75c. in order to respect the required component temperatures, a good thermal conductive path is required from the pcb and to the host equipment. this is achieved by a number of screw connections ? one additional screw (compared to the need for mechanical fixing and ground connection) are placed at a critical component location. critical components are placed close to the mounting screws of the pcb. the pcb is provided with eight copper layers which, besides establishing the electrical connections, are used also for heat transfer. additionally, plated through holes (0.5mm diameter) are used for establishing a heat path from the pcb component side to the solder side where needed. standard component mounting techniques considering the thermal constraints are used.
www.irf.com 7 mah-series (nominal voltage input, quad output) design methodology declared parts lists defining the eee parts technical standard and declared materials lists with material data including outgassing and surface treatment is part of the design standard. the mah-series is developed using a proven conservative design methodology, which includes selecting radiation tolerant, and established reliability components and fully derating to the requirements of eee-inst- 002 and ecss-q-st-11. in addition to verification and qualification testing and full acceptance testing for deliverable units, the performance characteristics are verified by theoretical analysis including worst case analysis including radiation degradation, parts stress analysis, mechanical analysis and thermal analysis. reliability assessment per mil-hdbk-217f has also been carried out. generic envelope data sheet & existing models listings the mah-series is made as a generic design allowing for adaptations to different satellite power buses and tm/tc systems, different output voltages and currents within the overall envelope specification defined for the ml-series. for each released variant of the mah-series detailed data sheet exists with exact data for all parameters. existing variants are listed in table below. a generic envelope data sheet is presented to indicate the envelope specification within which the mah- series can be adapted to specific customer requirements that cannot be met with one of the existing model variants listed in table below. where the generic data sheet lists min rated or max rated value, it is necessary to look up the actual parameter in the data sheet for the specific variant in question ? for new variants please contact ir hirel sales department. mah-series product variant input voltage outputs data sheet no. product status mah34101505q 34v +5.1v, 1,200ma tbd active (32-37.5v) +10.2v, 320ma -5.0v, 30ma +15v, 10ma mah501509r205q 50v +5.1v, 1,500ma tbd active (49.2-50.5v) +9.2v, 250ma -5.0v, 35ma +15v, 10ma mah5009r21505r106q 50v +5.1v, 1,600ma tbd active (49.2 ? 50.5v) +9.2v, 220ma -6.0v, 40ma +15v, 30ma mah10005r210155r4q 100v +5.2v, 1,700ma tbd active (97-101v) +10.1v, 250ma -5.4v, 50ma +15v, 30ma mah10010r11505q 100v +10.1v, 850ma tbd active (97-101v) +5.1v, 850ma -5.4v, 50ma +15v, 30ma
8 www.irf.com mah-series (nominal voltage input, quad output) generic envelope data sheet & existing models listings (continued) mah-series product variant input voltage outputs data sheet no. product status mah50101505r206q 50v +5.2v, 1,700ma tbd active (45-50.5v) +10.1v, 220ma -6.0v, 65ma +15v, 30ma mah50101505r205r4q 50v +10.1v, 850ma tbd active (45-50.5v) +5.1v, 925ma -5.4v, 50ma +15v, 30ma mah70101505r206q 70v +5.2v, 1,700ma tbd active (68-71v) +10.1v, 220ma -6.0v, 65ma +15v, 30ma mah100101505r206q 100v +5.2v, 1,700ma tbd active (98-101v) +10.1v, 220ma -6.0v, 65ma +15v, 30ma mah341206d 34v +6v, 820ma tbd active (33-37v) +12v, 430ma mah100061205t 100v +6v, 1,550ma tbd active (97-103v) +12v, 50ma -5v, 50ma mah1000905t 100v +5v, 1,008ma tbd active (95-105v) +9v, 132ma -5v, 312ma mah10009050522q 100v +5v, 587ma tbd active (97-103v) +9v, 1,078ma -7v, 101ma +22v, 10ma
www.irf.com 9 mah-series (nominal voltage input, quad output) specifications electrical performance characteristics (generic) * meets full derating for notes to specifications, refer to page 12 input voltage range -0.5vdc to +max rated input voltage range (note 9) +min rated to +max rated output power internally limited output power 0 to max. rated operating mounting point -55c to +100c operating mounting point -40c to +75c * temperature (note 10) temperature (note 10) storage temperature -55c to +125c cold start temperature (note 9) -55c recommended operating conditions absolute maximum ratings conditions -40c t c +75c v in = v nom dc 5%, c l = 0 parameter condition unless otherwise specified min. nom. max. unit primary input voltage min rated nominal max rated v output voltage ( v out ) note 1 ( each output ) +v1 1 0% i out 100% rated load 99.5 100 100.5 +v2 1 99.5 100 100.5 -v3 1 99.5 100 100.5 +v4 1 99.5 100 100.5 +v1 2 0% i out 100% rated load 99.0 101.0 +v2 2 99.0 101.0 -v3 2 99.0 101.0 +v4 2 99.0 101.0 +v1 3 0% i out 100% rated load 98.0 102.0 +v2 3 98.0 102.0 -v3 3 98.0 102.0 +v4 3 98.0 102.0 output power ( p out ) ( each output ) +v1 1,2,3 v in = min rated, nominal, max rated 8.0 +v2 either output 5.0 -v3 total output power for all 1.5 +v4 outputs limited to 13w 0.5 output current ( i out ) ( each output ) +v1 1,2,3 v in = min rated, nominal, max rated 0 1,700 +v2 either output, note x (??) 0 850 -v3 0 300 +v4 0 30 w ma limits % % %
10 www.irf.com mah-series (nominal voltage input, quad output) for notes to specifications, refer to page 12 electrical performance characteristics (generic) (continued) conditions -40c t c +75c v in = v nom dc 5%, c l = 0 parameter condition unless otherwise specified min. nom. max. unit line regulation ( vr line ) 1,2,3 v in = min rated, nominal, max rated ( each output ) i out = 10%, 50%, 100% rated -1.0 1.0 mv load regulation ( vr load ) 1,2,3 v in = min rated, nominal, max rated ( each output ) i out = 10%, 50%, 100% rated -1.0 1.0 mv cross regulation (vr cross ) 1,2,3 v in = min rated, nominal, max rated note 1 1.0 mv input current 1,2,3 i out = 0, commanded on 10 15 commanded off 2.0 switching frequency ( f s ) 1,2,3 notes 1, 7 min rated nominal max rated khz input under-voltage trig level 1,2,3 0% i out 100% rated load min rated max rated v output sequencing i out > 20% for output 1, 2, 4 turn-on delay 1,2,3 output 3 to output 1, 2, 4 2.0 12 turn-off delay output 1-2-4 to output 3 1.0 8.0 output ripple ( v rip ) v in = min rated, nominal, max rated ( each output ) i out = 100% rated load +v1 1 frequency domain 100hz - 50mhz 1.0 +v2 note 1 1.0 -v3 1.0 +v4 1.0 +v1 1,2 time domain 100hz - 50mhz max rated +v2 notes 1, 2 max rated -v3 max rated +v4 max rated efficiency ( e ff ) for combined output power of no greater than 20% of p max 1,2,3 i out = 20% rated load min rated 50% of p max i out = 50% rated load min rated 100% of p max i out = 100% rated load min rated telecommand i/f pulse voltage high nominal 26v type 1,2,3 note 1 +22 +30 v nominal 12v type +12 +17 v pulse voltage low -40 0.5 v pulse duration 10 1000 ms mv pp % limits ma ms mv rms
www.irf.com 11 mah-series (nominal voltage input, quad output) electrical performance characteristics (generic) (continued) for notes to specifications, refer to page 12 conditions -40c t c +75c v in = v nom dc 5%, c l = 0 parameter condition unless otherwise specified min. nom. max. unit telemetry converter on 1,2,3 min rated max rated ? converter off 1.0 m ? current limit point ( each output ) +v1 1,2,3 v out = 100mv below nominal min rated max rated +v2 min rated max rated -v3 min rated max rated +v4 min rated max rated output response to step load changes ( v tld ) +v1 1,2,3 20% to/from full load min rated max rated +v2 note 3 min rated max rated -v3 min rated max rated +v4 min rated max rated recovery time step load changes ( t tld ) +v1 1,2,3 20% to/from full load 2.5 +v2 notes 3, 4 2.5 -v3 2.5 +v4 2.5 turn-on response overshoot ( v os ) 10% load, full load +v1 1,2,3 % of nominal output voltage 105 +v2 note 5 105 -v3 105 +v4 105 turn-on delay ( t dly ) 2.0 10 ms capacitive load ( c l ) +v1 1,2,3 i out = 100% rated load max rated +v2 no effect on dc performance max rated -v3 notes 1, 6 max rated +v4 each output max rated % f limits ma mv pk ms
12 www.irf.com mah-series (nominal voltage input, quad output) notes: specification and electrical performance characteristics tables 1. parameter is tested as part of design characterization or after design changes. thereafter, parameter shall be guaranteed to the limits specified. 2. guaranteed for a d.c. to 50mhz bandwidth. tested using a 10.7 mhz bandwidth. 3. load step transition time 10 s. 4. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of its steady state value. 5. turn-on delay time from application of telecommand pulse to the point where output 2 = 98% of nominal output voltage. 6. capacitive load may be any value from 0 to the maximum limit without compromising the output sequencing performance. a capacitive load in excess of the maximum limit may influence the output sequencing performance and start-up time, converter operation and dc performance will remain intact. 7. the switching frequency and 1st and 2nd harmonic of the input ripple is tested on every unit. 8. mil-hdbk-217f2 stress-dependent method is used with 2 exceptions: for soldering a fixed failure rate at 0.035fit is used and for power mosfets the dissipated power (instead of rated power) is used for the pr parameter. 1 fit is 1 failure in 10 9 hours. 9. the converter meets full derating per eee-inst-002 and ecss-q-30-11 with the following exception: for schottky diode jans1n5819 a maximum derated junction temperature of +110c. for eee-inst-002 it is required that ceramic capacitors with a voltage stress below 10v shall be rated for minimum 100v - in the product such capacitors is rated for 50v minimum. 10. although operation temperatures between -55c to +100c and -40c to+75c is guaranteed, no parameter limits are specified. electrical performance characteristics - definition of conditions condition definition comment 1 bol @ +25c interface temperature initial setting 2 bol @ -40c to +75c interface temperature initial setting and worst case temperature variation 3 eol @ -40c to +75c interface temperature worst case performance including initial setting, temperature variation, aging and radiation degradation electrical performance characteristics (generic) (continued) conditions -40c t c +75c v in = v nom dc 5%, c l = 0 parameter condition unless otherwise specified min. nom. max. unit emc conducted i out = 100% rated load susceptibility (line rejection) 1 primary power sine wave injection of 90 100 db 2v p-p , 100hz to 1.0mhz, note 1 electromagnetic interference i out = 100% rated load (emi), conducted emission 1 notes 1, 7 (ce) isolation 1 input to output, any potential to 10 m ? telecommand input and any potential to telemetry output, test @ 100vdc device weight 90 g failure rate mil-hdbk-217f2, sf, 35c, note 8 100 fits limits per fig. 2 limits
www.irf.com 13 mah-series (nominal voltage input, quad output) grounding and isolation scheme test plan - ebb the ebb must pass the following tests: test no. type of test location* remarks 1 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) ird acceptance test procedure 2 electrical performance test in temperature (q-level) ird acceptance test procedure 3 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) ird acceptance test procedure 4 final inspection ird general inspection procedure model definition and test plans model definition parameter grounding & isolation performance isolation: prim. to secondary: telecommand: tc status tm: o/p status tm: temperature tm: >10mohm // < 50nf floating floating referenced to secondary return floating grounding: secondary return bound to chassis via multiple screw connections. model description build standard ebb the ebb is an electrical representative model. the ebb is intended to be used by customers in their proto type at equipment level. ebb models are built at ir?s danish design center. the pcb will be had soldered by the engineering group (certified operator). no staking and conformal coating is foreseen. preferably same type of eee parts as intended for flight, but lower grade will be used for convenience. for resistors and capacitors different types with same basic characteristics may be used eqm the eqm is an electrical and mechanical representative model. the eqm is intended to be used by customer in their eqm at equipment level. flight standard for processes. same type of eee parts as intended for flight, but lower grade may be used for convenience. fm flight standard models. full flight standard
14 www.irf.com mah-series (nominal voltage input, quad output) test plan - eqm test plan - fm note: location* - ird: ir?s danish design center, skovlunde, denmark - irsj: ir?s site in san jose, california, usa the eqm must pass the following tests: test no. type of test location* remarks 1 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) irsj acceptance test procedure 2 thermal cycling with electrical monitoring of input and outputs (q-level) irsj acceptance test procedure 10 cycles 3 electrical performance test in temperature (q-level) irsj acceptance test procedure 4 random vibration test in (q-level) external test house vibration test procedure 5 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) irsj acceptance test procedure 6 mechanical measurements irsj acceptance test procedure 7 final inspection irsj general inspection procedure the fm must pass the following tests: test no. type of test location* remarks 1 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) irsj acceptance test procedure 2 electrical performance test in temperature (a-levels) irsj acceptance test procedure 3 electrical performance test, room temperature incl. limited emc test (ce 50khz-1mhz) irsj acceptance test procedure 4 electrical performance test, room temperature irsj acceptance test procedure 5 mechanical measurements irsj acceptance test procedure 6 final inspection irsj general inspection procedure
www.irf.com 15 mah-series (nominal voltage input, quad output) radiation performance tid the tid radiation performance is guaranteed by worst case analysis with radiation degradation data for each radiation sensitive component used in the dc-dc converter. for tid radiation verification testing (rvt) for each wafer lot for all sensitive components is part of the eee parts requirements per table below. see the see radiation performance is guaranteed by a combination of derating and mitigation at circuit level. for mitigation at circuit level both theoretical analysis and testing with imposed see effects are performed. the applicable see and mitigation concept is presented in table below. the maximum output perturbation is 5% of the nominal output voltage during any see. component type applicable see mitigation concept rh mosfet segr vds derating in combination with see soa curves from manufacturer data sheet op-amp set, 15us perturbation to rail mitigation at circuit level (filtering) voltage reference set, 10us perturbation to rail mitigation at circuit level (filtering) set, 15us perturbation to rail mitigation at circuit level (filtering) double pulses mitigation at circuit level (filtering, no saturation of magnetic parts) pwm missing pulses mitigation at circuit level (filtering, no saturation of magnetic parts) component type rvt plan (applicable to all flight lots) jans2n2222a ldrs 0.01 to 0.1 rad/s up to 200krad per ir rvt plan jans2n2907a ldrs 0.01 to 0.1 rad/s up to 200krad per ir rvt plan jans2n5153 ldrs 0.01 to 0.1 rad/s up to 200krad per ir rvt plan jans2n5154 ldrs 0.01 to 0.1 rad/s up to 200krad per ir rvt plan jansr2n7492t2 rvt by manufacturer (hdr) irhf57214sescs rvt by manufacturer (hdr) jansr2n7616ub rvt by manufacturer (hdr) jansr2n7626ub rvt by manufacturer (hdr) lm124awr rvt by manufacturer (eldrs) is2-1009rh rvt by manufacturer (hdr) ldrs 0.01 to 0.1 rad/s up to 100krad per ir rvt plan uc1845a ldrs 0.01 to 0.1 rad/s up to 100krad per ir rvt plan tid rvt plan table
16 www.irf.com mah-series (nominal voltage input, quad output) eee parts technical standard component screening notes: 1. screening as per mil-prf- 9016 with additional screening as per teledyne test specification 0-40-837 rev b 2. custom magnetics (chokes and transformers) screening is as per mil-std-981 with exception for: radiographic inspection, monitoring during last thermal shock cycle, power burn-in component component type specification quality / screening class level (minimum) capacitors br40 escc 3001/030 escc level b cdr31-34 bp mil-prf-55681 mil-s cdr31-34bx mil-prf-55681 mil-s cwr29 mil-prf-55365 weibull c, surge current option b 1n6640us mil-prf-19500/609 jans 1n5806us mil-prf-19500/477 jans 1n5819ur-1 mil-prf-19500/586 jans relays j422-26m shock resistant tr-hirel-1/422 see note 1 mpp toroids product specific mil-std-981 see note 2 ferrite toroids product specific mil-std-981 see note 2 bipolar junction 2n2222a mil-prf-19500/255 jans transistors 2n2907a mil-prf-19500/291 jans 2n5153 mil-prf-19500/545 jans 2n5154 mil-prf-19500/544 jans power mosfet irhlub770z4 mil-prf-19500/744 jans irhlub7970z4 mil-prf-19500/745 jans irhf57034 mil-prf-19500/703 jans irhf57214se mil-prf-19500/703 jans resistors rm1005b mil-prf-55342 mil-r rm1206b mil-prf-55342 mil-r rwr81 mil-prf-39007 mil-s transformers ferrite rm6, product specific mil-std-981 see note 2 is2-1009 mil-prf-38535 qml v lm124a mil-prf-38535 qml v uc1845a mil-prf-38535 qml v zeners 1n4105ur-1 mil-prf-19500/435 jans 1n4109ur-1 mil-prf-19500/435 jans 1n4110ur-1 mil-prf-19500/435 jans ics diodes inductors
www.irf.com 17 mah-series (nominal voltage input, quad output) dpa rules pin designation tables component component type specification quality / screening class level (minimum) capacitors ceramic, solid tantalum 3 pcs / value /datecode diodes qpl-listed 3 pcs / datecode no precap csi ic?s qpl-listed 3 pcs / datecode no precap csi relays 3 pcs / datecode resistors none transistors qpl-listed 3 pcs / datecode no precap csi non-qpl 3 pcs / datecode precap csi (except for ir mosfets, tested to be scs parts) pin # function 101 v1 (positive) 102 v1 return 103 v4 (positive) 104 v4 return 105 voltage telemetry 106 voltage telemetry return 107 v3 return 108 v3 (negative) 109 v2 return 110 v2 (positive) output terminals assignment list indent:output terminals (solder, pins, straight) pin # pin # function 1 main bus return 9 main bus return 2 tm temp 10 tm temp return 3 main bus 11 main bus 4 chasis (ground) 12 tm voltage 5 chasis (ground) 13 tc on return 6tc on 14 tc off return 7 tc off 15 tm status 8 tm status return indent: input terminals (solder, pins, straight) input terminals assignment list
18 www.irf.com mah-series (nominal voltage input, quad output) recommended mounting stud design it is foreseen with a mounting stud design with circular mounting studs made out of aluminum with a diameter of 4.0mm and a treaded hole support mounting with m2 screws. 5pcs m2 screws are used for mounting the board. mounting torque shall be 30ncm 5.0ncm. electrical terminal design
www.irf.com 19 mah-series (nominal voltage input, quad output) mechanical diagram
20 www.irf.com mah-series (nominal voltage input, quad output) part numbering world headquarters: 101 n, sepulveda blvd., el segundo, california 90245, usa tel: (310) 252-7105 ir san jose: 2520 junction avenue, san jose, california 95134, usa tel: (408) 434-5000 ir denmark: literbuen 10c, dk-2740 skovlunde, denmark, tel: +45 4457 5010 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 10/2013 application information standard documentation

users?s manual end item data package with coc, applicable configuration, mip photo and test results design justification documentation the following documentation can be made available upon request: worst case analysis parts stress analysis thermal analysis mechanical analysis fmeca reliability assessment declared components list declared materials list declared process list each conbverter is delivered with the following documentation. output 1 model nominal input voltage 100 = 100v 05 = +5v number of outputs q = quad outputs quality level ebb = elegant bread board model eqm = engineering qualification model blank = fight model mah-series output 2 05 = +5v mah 100 05 05 08 12 q /xxx output 3 08 = -8v output 4 12 = +12v

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