View M3GB2800S_8749987.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.irf.com 1 hybrid-high reliability radiation hardened dc-dc converter m3gb-series description total dose > 200 krads(si), typically usable to > 300 krads(si) see hardened to let up to 82 mev . cm 2 /mg internal emi filter; converter capable of meeting mil-std-461c ce03 low weight, < 110 grams magnetically coupled feedback 18v to 50v dc input range up to 40w output power single and dual output models include 3.3, 5, 5.2, 12, 15, 5, 7, 12 and 15v high efficiency - to 83% -55c to +125c operating temperature range 100m ? @ 100vdc isolation under-voltage lockout short circuit and overload protection remote sense on single output models adjustable output voltage for all models synchronization input and output external inhibit > 7,000,000 hour mtbf features 28v input, single/dual output applications the m3gb-series of dc-dc converters are second generation design of the legacy m3g-series product family but with enhanced overall performance. m3gb- series is form, fit and functional equivalent to the first generation m3g-series. it is designed to be backward compatible to the m3g-series with the addition of an output voltage adjustment pin for the single output models. much the same as the original m3g-series, these converters are radiation hardened, high reliability converters designed for extended operation in hostile environments. their small size and low weight make them ideal for applications such as geostationary earth orbit satellites and deep space probes. they exhibit a high tolerance to total ionizing dose, single event effects and environmental stresses such as temperature extremes, mechanical shock, and vibration. the converters incorporate a fixed frequency single ended forward topology with magnetic feedback and an internal emi filter that utilizes multilayer ceramic capacitors that are subjected to extensive lot screening for optimum reliability. these converters are capable of meeting the conducted emissions and conducted susceptibility requirements of mil-std-461c without any additional components. external inhibit and synchronization input and output allow these converters to be easily incorporated into larger power systems. they are enclosed in a hermetic 3" x 2" x 0.475" package constructed of an aluminum/silicon-carbide (al/sic) base and an alloy 48 ring frame and they weigh less than 110 grams. the package utilizes rugged ceramic feed-through copper core pins and is sealed using parallel seam welding. m3gb non-flight versions of the m3gb-series converters are available for system development purposes. variations in electrical specifications and screening to meet custom requirements can be accommodated. manufactured in a facility fully qualified to mil-prf- 38534, these converters are fabricated utilizing dla land and maritime qualified processes. for available screening options, refer to device screening table in the data sheet. geostationary earth orbit satellites (geo) deep space satellites / probes strategic weapons and commun ication system pd-97823
2 www.irf.com m3gb-series (28v input, single/dual output) circuit description an internal emi filter allows the converter to meet the conducted emissions requirements of mil-std-461c on the input power leads. a two-stage output filter reduces the typical output ripple to less than 20mv peak-to-peak. output current is limited under any load fault condition to approximately 125% of rated. an overload condition causes the converter output to behave like a constant current source with the output voltage dropping below nominal. the converter will resume normal operation when the load current is reduced below the current limit point. this protects the converter from both overload and short circuit conditions. an under-voltage lockout circuit prohibits the converter from operating when the line voltage is too low to maintain the output voltage. the converter will not start until the line voltage rises to approximately 16.5 volts and will shut down when the input voltage drops below 15.3 volts. the 1.2v of hysteresis reduces the possibility of line noise interfering with the converter?s start-up and shut down. an external inhibit port is provided to control converter operation. the nominal threshold relative to the input return (pin 2) is 1.4v. if 2.0 volts or greater are applied to the inhibit pin (pin 3) then the converter will operate normally. a voltage of 0.8v or less will cause the converter to shut-down. the pin may be left open for normal operation and has a nominal open circuit voltage of 4.0v. design methodology the m3gb-series

!"# $%
!"# &% '( )#* + ,
,-. ) /

/ . 0

1!23" !34*
!35. 6
7 /

/ +

. 8!8)3
*
!8)3
(

/

. "

*
! '"*33-+ 9 )+ !+ " + 2

3 '236-
* '"52-. synchronization input and output allow multiple converters to operate at a common switching frequency. converters can be synchronized to one another or to an externally provided clock. this can be used to eliminate beat frequency noise or to avoid creating noise at certain frequencies for sensitive systems. remote sense is provided on the single output models to compensate for voltage drops in the interconnects between the converter and the load. the output voltage of dual output models can be adjusted by a single external resistor. the m3bg-series converters utilize a single-ended forward topology with resonant reset. the nominal switching frequency is 500khz. electrical isolation and tight output regulation are achieved through the use of a magnetically coupled feedback. voltage feed-forward with duty factor limiting provides high line rejection and protection against output over voltage in the event of an internal control loop failure. this mechanism limits the maximum output voltage to approximately 30% over the nominal regardless of the line voltage.
www.irf.com 3 m3gb-series (28v input, single/dual output) 1 meets derating per mil-std-975 2 for operation at +125c see table note 13 3 max voltage is 75v for 5v models electrical performance characteristics for notes to specifications, refer to page 5 specifications limits parameter group a subgroup conditions -55 c t c +85 c v in = 28v dc 5%, c l = 0 unless otherwise specified min nom max unit input voltage (v in ) 18 28 50 v output voltage (v out ) m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d 1 1 1 1 1 1 1 1 1 2,3 2,3 2,3 2,3 2,3 2.3 2,3 2,3 2,3 i out = 100% rated load note 4 i out = 100% rated load note 4 3.29 4.99 5.19 11.95 14.94 4.99 6.97 11.95 14.94 3.26 4.95 5.15 11.88 14.85 4.95 6.93 11.88 14.85 3.31 5.01 5.21 12.00 15.00 5.01 7.00 12.00 15.00 3.33 5.03 5.23 12.05 15.06 5.03 7.03 12.05 15.06 3.34 5.05 5.25 12.12 15.15 5.05 7.07 12.12 15.15 v output power (p out ) m3g2803r3s all others 1,2,3 v in = 18, 28, 50 volts, note 2 0 0 30 40 w output current (i out ) m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d 1,2,3 v in = 18, 28, 50 volts, note 2 either output, note 3 either output, note 3 either output, note 3 either output, note 3 0 0 0 0 0 0 0 0 0 9.10 8.00 7.70 3.34 2.67 6.40 4.57 2.67 2.14 a line regulation (vr line ) single dual 1,2,3 v in = 18, 28, 50 volts i out = 0, 50%, 100% rated, note 4 -10 -20 10 20 mv load regulation (vr load ) 1,2,3 i out = 0, 50%, 100% rated, note 4 v in = 18, 28, 50 volts -0.5 0.5 % input voltage range -0.5v dc to +80v dc 3 input voltage range +18v dc to +60v dc output power internally limited in p ut volta g e ran g e 1 +18v dc to +45v dc lead temperature +300c for 10 seconds output power 0 to max. rated operating temperature -55c to +135c o p eratin g tem p erature 2 -55c to +125c storage temperature -55c to +135c o p eratin g tem p erature 1 -55c to +70c recommended operating conditions absolute maximum ratings
4 www.irf.com m3gb-series (28v input, single/dual output) electrical performance characteristics (continued) for notes to specifications, refer to page 5 limits parameter group a subgroup conditions -55 c t c +85 c v in = 28v dc 5%, c l = 0 unless otherwise specified min nom max unit cross regulation (vr cross ) m3gb2805d m3gb2807d m3gb2812d m3gb2815d 1,2,3 duals only, note 5 v in = 18, 28, 50 volts -5.0 -4.0 -2.0 -2.0 5.0 4.0 2.0 2.0 % input current (i in ) 1,2,3 i out = 0, pin 3 open 50 80 ma pin 3 shorted to pin 2 2.0 5.0 switching frequency (f s ) 1,2,3 sync. input (pin 4) open 475 500 525 khz output ripple (v rip ) m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d 1,2,3 i out = 100% rated load notes 4, 6 15 20 25 25 25 20 25 30 30 35 50 50 60 80 50 55 60 60 mv p-p efficiency (e ff ) m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d 1,2,3 i out = 100% rated load note 4 72 78 78 77 77 78 78 77 78 75 80 80 80 81 80 80 81 82 % enable/inhibit input open circuit voltage drive current (sink) voltage range note 1 3.0 -0.5 5.0 100 50 v a v synchronization input frequency range pulse high level pulse low level pulse transition time pulse duty cycle ext. clock on sync. input (pin 4) note 1 450 4.0 -0.5 40 20 600 10 0.5 80 khz v v v/ s % current limit point expressed as a percentage of full rated load current 1,2,3 v out = 90% of nominal, note 4 118 125 130 % power dissipation, load fault (p d ) 1,2,3 short circuit, overload, note 8 12 18 w output response to step load changes (v tld ) 4,5,6 half load to/from full load, notes 4, 9 -300 300 mvpk recovery time, step load changes (t tld ) 4,5,6 half load to/from full load, notes 4, 9,10 50 200 s output response to step line changes (v tln ) 22v to/from 34v i out = 100% rated load, notes 1,4,11 -200 200 mv pk recovery time, step line changes (t tln ) 22v to/from 34v i out = 100% rated load, notes 1,4,10,11 50 200 s turn-on response overshoot (v os ) turn-on delay (t dly ) 4,5,6 no load, full load notes 4,12 1.0 2.0 5.0 % ms
www.irf.com 5 m3gb-series (28v input, single/dual output) electrical performance characteristics (continued) notes: electrical performance characteristics table 1. parameter is guaranteed to the limits specified in table by design, but not tested. limits apply to the operating range specified in table, unless otherwise specified. no group a subgroups are specified for this test. 2. parameter verified during line and load regulation tests. 3. limit represents 80% of total rated output current. to achieve rated output power, the remaining 20% of the total rated output current must be provided by the other output. 4. load current split equally between outputs on dual output models. 5. cross regulation is measured with 20% rated load on output under test while changing the load on the other output from 20% to 80% of rated. 6. guaranteed for a d.c. to 20mhz bandwidth. tested using a 20khz to 10mhz bandwidth. 7. capacitive load may be any value from 0 to the maximum limit without compromising dc performance. a capacitive load in excess of the maximum limit may interfere with the proper operation of the converter?s overload protection, causing erratic behavior during turn-on. 8. overload power dissipation is defined as the device power dissipation with the load set such that v out = 90% of nominal. 9. load step transition time 10 s. 10. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of its steady state value. 11. line step transition time 100 s. 12. turn-on delay time from either a step application of input power or a logic low to a logic high transition on the inhibit pin (pin 3) to the point where v out = 90% of nominal. 13. for operation at temperatures between +85c and +125c, derate the maximum input voltage linearly from 60v to 40v and the maximum output power linearly from 100% to 75%. limits parameter group a subgroup conditions -55 c t c +85 c v in = 28v dc 5%, c l = 0 unless otherwise specified min nom max unit capacitive load (c l ) m3gb2803r3s m3gb2805s m3gb2805r2s m3gb2812s m3gb2815s m3gb2805d m3gb2807d m3gb2812d m3gb2815d i out = 100% rated load no effect on dc performance notes 1, 4, 7 each output on duals 2200 1000 1000 180 120 500 300 90 60 f line rejection i out = 100% rated load dc to 50khz, notes 1, 4 40 50 db isolation 1 input to output or any pin to case except pin 6, test @ 100vdc 100 m ? device weight 110 g mtbf mil-hdbk-217f2, sf, 35 c 7.0 x 10 6 hrs
6 www.irf.com m3gb-series (28v input, single/dual output) fig 1. block diagram - single output fig 2. block diagram - dual output + - + -
www.irf.com 7 m3gb-series (28v input, single/dual output) fig 3. typical conducted emissions, positive lead fig 4. typical line rejection
8 www.irf.com m3gb-series (28v input, single/dual output) fig 5. typical efficiency @25c, m3gb2805s fig 6. typical efficiency @25c, m3gb2815d 40 50 60 70 80 90 0 102030405060708090100 percentage of r ated l oad, % e f f icien cy, % 18v input 28v input 50v input 40 50 60 70 80 90 0 102030405060708090100 p ercentage of rated l oad, % e f f ici en cy, % 18v input 28v input 50v input
www.irf.com 9 m3gb-series (28v input, single/dual output) radiation performance characteristics test method min typ unit mil-prf-883, method 1019 total ionizing dose (gamma) operating bias applied during exposure, full rated load, v in = 28v 200 300 krads(si) dose rate (gamma dot) mil-std-883, method 1023 temporary saturation operating bias applied during exposure, 1e8 rads(si)/sec survival full rated load, v in = 28v 4e10 1e11 (supported by analysis) neutron fluence mil-std-883, method 1017 8e12 1e13 neutrons/cm 2 (supported by analysis) heavy ions (let) single event effects operating bias applied during exposure, seu, sel, segr, seb full rated load, v in = 18v, 28v, 50v 82 mev cm 2 / m g application notes: a) attachment of the converter. the following procedure is recommended for mounting the converter for optimum cooling and to circumvent any potential damage to the converter. 5. tighten the screws with an appropriate torque driver. torque the screws up to 6 inlb in the sequence shown above. 1. check the mounting surfaces and remove foreign material, burrs if any or anything that may interfere with the attachment of the converter. 2. place the gasket on the surface reserved for the converter and line it up with the mounting holes. 3. place the converter on the gasket and line both up with mounting holes. 4. install screws using appropriate washers and tighten by hand (~ 4 inoz) in the sequence shown below. the procedure for mounting the converter is as follows: ensure that flatness of the plate where m3gb converter to be mounted is no greater than 0.003? per linear inch. it is recommended that a thermally conductive gasket is used to promote the thermal transfer and to fill any voids existing between the two surfaces. ir recommends sil-pad 2000 with the thickness of 0.010". the shape of the gasket should match the footprint of the converter including the mounting flanges. the gasket is available from ir. the m3gb-series converter requires either m3 or 4-40 size screws of attachment purposes.
10 www.irf.com m3gb-series (28v input, single/dual output) b) output voltage adjustment. to adjust the output voltage of the single output models, a resistor (r adj ) is connected between the adjust pin (pin 8) and either the positive or negative remote sense pins, depending on whether the output voltage is to be adjusted higher or lower than the nominal set-point. this allows the outputs to be reliably adjusted by approximately +10% to -20% of the nominal output voltage. refer to fig. 7 and use equations provided to calculate the required resistance (r adj ). fig 7. configuration for adjusting single output voltage single output: for all single output models, to adjust the output voltages higher: r adj = 10 x (v nom ?2.5) -50 v out -v nom where: r adj is in kohms r adj is connected to the -out pin and v nom < v out < 1.1v nom (fig. 7, note 2) v nom is the nominal output voltage with the adjust pin left open v out is the desired output voltage for all single output models, to adjust the output voltages lower: r adj = 4 x (v nom ?2.5) x ( v out ?2.5) -50 v out -v nom where: r adj is in kohms r adj is connected to the +out pin and 0.8v nom < v out < v nom (fig. 7, note 1) v nom is the nominal output voltage with the adjust pin left open v out is the desired output voltage
www.irf.com 11 m3gb-series (28v input, single/dual output) fig. 8. configuration for adjusting dual output voltage the dual output voltage of the dual output models, a resistor (r adj ) is connected between the adjust pin (pin 8) and either output. this allows the outputs to be reliably adjusted by approximately +10% to -20% of the nominal output voltage. refer to fig. 8 and use equations provided to calculate the required resistance (r adj) . dual output: for all dual output models, to adjust the output voltages higher: r adj = 10 x (v nom ?1.25) -75 v out -v nom where: r adj is in kohms r adj is connected to the -out pin and v nom < v out < 1.1v nom (fig. 8, note 2) v nom is the nominal magnitude of the output voltages with the adjust pin left open v out is the desired magnitude of the output voltages for all dual output models, to adjust the output voltages lower: -75 r adj = 8 x (v nom ? 1.25) x ( v out ?1.25) v out -v nom where: r adj is in kohms r adj is connected to the +out pin and 0.8v nom < v out < v nom (fig. 8, note 1) v nom is the nominal magnitude of the output voltages with the adjust pin left open v out is the desired magnitude of the output voltages
12 www.irf.com m3gb-series (28v input, single/dual output) mechanical diagram pin designation (single/dual) 3.055 max. 0.500 2.00 0.45 1.10 2.500 2.30 0.200 typ. non- cum. 0.30 1.400 ref. 3.50 ref. 0.475 max. 0.080 max. 0.260 pin ?0.040 r0.0625 4 places 0.50 0.60 0.20 tolerance : .xx 0.01 .xxx 0.005 1 2 3 4 5 12 13 11 10 9 8 7 6 0.25 2.055 max. flange detail 0.40 0.25 0.14 r 0 . 0 6 2 5 pin # designation pin # designation 1 + input 8 adjust 2 input return 9 - sense / nc 3 inhibit 10 + sense / nc 4 sync. input 11 nc / - output 5 sync. output 12 output return 6 case ground 13 + output 7nc
www.irf.com 13 m3gb-series (28v input, single/dual output) part numbering device screening requirement mil-std-883 method no suffix ck em temperature range -55c to +85c -55c to +85c -55c to +85c element evaluation mil-prf-38534 class k class k n/a non-destructive bond pull 2023 yes yes n/a internal visual 2017 yes yes temperature cycle 1010 cond c cond c cond c constant acceleration 2001, y1 axis 3000 gs 3000 gs 3000 gs pind 2020 cond a cond a n/a 320 hrs @ 125c 320 hrs @ 125c 48 hrs @ 125c ( 2 x 160 hrs ) ( 2 x 160 hrs ) final electrical mil-prf-38534 -55c, +25c, -55c, +25c, -55c, +25c, ( group a ) & specification +85c +85c +85c pda mil-prf-38534 2% 2% n/a seal, fine and gross 1014 cond a, c cond a, c cond a radiographic 2012 yes yes n/a external visual 2009 yes yes burn-in 1015 world headquarters: 101 n, sepulveda blvd, el segundo, california 90245, tel: (310) 252-7105 ir san jose: 2520 junction avenue, san jose, california 95134, tel: (408) 434-5000 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 05/2015 notes: best commercial p ractice. ck is a dla land and maritime ( formerl y dscc ) p art markin g used to desi g nate a class k com p liant h y brid. the ck marking does not indicate the hybrid is radiation certified. no suffix is a radiation rated device but not available as a dla land and maritime qualified smd per mil-prf-38534. international rectifier currentl y does not have a dla land and maritime certified radiation hardness assurance pro g ram . output voltage model nominal input voltage 28 = 28v screening level (please refer to screening table) no suffix, ck, em 03r3 = 3.3v, 05 = 5v 05r2 = 5.2v, 12 = 12v 15 = 15v output s = single d = dual m3gb 28 05 s /xx x lead finish for ck only c = gold plated a = solder dipped blank for no suffix and em lead finish for no suffix = gold plated lead finish for em is gold plated or solder dipped depending on availability

▲Up To Search▲

Price & Availability of M3GB2800S

	To Download M3GB2800S Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .