features ? ? total ionization dose (tid) > 100 krad(si) ? ? see hardened to let level > 82 mev ? cm 2 /mg ? ? internal emi filter ? ? low weight, < 110 grams ? ? magnetically coupled feedback ? ? 18v to 40v dc input range ? ? up to 50w output power ? ? single output models include 1v, 1.5v, 1.8v, 2.5v, 3.3v and 5v ? ? high efficiency - to 87% ? ? -55c to +85c operating temperature range ? ? 100m ? @ 100v dc isolation ? ? under-voltage lockout ? ? short circuit and overload protection ? ? output voltage adjust ? ? synchronization output and input ? ? remote sense ? ? external inhibit ? high reliability, high efficiency radiation hardened dc-dc converter gh gh-series description the gh-series is a family of low voltage single output dc-dc converters. they are specifically designed in response to the need for low voltage at moderate current levels with the high efficiency and tight regulation dictated by modern digital processing applications. the converters are radiation hardened, high re liability converte rs designed for extended operation in hostile environments. their small size and low weight make them ideal for applications such as geostationary eart h 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. all components are fully de-rated to meet the requirements of mil-std-975, mil-std-1547 except for the cdr type of capacitors, a c apacitor with 50v rating is used for in-circuit voltage stress of less than10v. thorough analyses and documentation including beginning-of-life (bol) and end-of-life (eol) electrical worst case (wca) operation, component stress and de-rating, radiation susceptibility (tree), thermal stress, failure mode and effects (fmea), and reliability (mtbf) are available for customer review. the design incorporates a fixed frequency topology with magnetic feedback. synchronous rectification is deployed to maximize efficiency performance. the converters include an internal emi filter that is capable of meeting the conducted emission requirements of most major satellite power busses. incorporation of many functional features including on/off command, remote sensing, and under-voltage lockout make the design suitable for today?s space design applications. the converter is enclosed in a hermetically sealed package with the overall dimensions of 3.5"l x 2.50?w x 0.475"h including the i/o pins and mounting tabs. the package base material is silicon carbide-aluminum (aisic). the package ring frame is alloy 48. the package utilizes rugged ceramic feed-through copper core i/o pins and is sealed using parallel seam welding. the total mass of a converter is less than 110 grams. 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. 1 2016-05-16 pd-97440d 28v input, single output applications ? ? geostationary earth orbit satellites (geo) ? ? deep space satellites / probes ? ? strategic weapons and communication system non-flight versions of t he gh-series converters are available for system development purposes. variations in electrical specifications and screening to meet custom requirements can be accommodated.
gh-series (28v input, single output) 2 2016-05-16 electrical performan ce characteristics for notes to electrical performance characteristics, refer to page 4. specifications absolute maximum ratings ? recommended operating conditions ??? input voltage range -0.5v dc to +60v dc input voltage range 1 +18v dc to +40v dc output power internally limited output power 0 to max. rated lead temperature +300c for 10 seconds operating case temperature -55c to +85c operating case temperature -55c to +125c (note 13) operating case temperature 1 storage temperature -55c to +135c -55c to +70c ? 1. meets derating per mil-std-975 parameter group a subgroup conditions -55c ? t c ? +85c v in = 28v dc 5%, c l = 0 unless otherwise specified limits unit min nom max input voltage 18 28 40 v output voltage (v out ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 1 1 1 1 1 1 2,3 2,3 2,3 2,3 2,3 2,3 i out = 100% rated load note 3 0.98 1.48 1.77 2.47 3.28 4.98 0.96 1.45 1.75 2.45 3.24 4.93 1.00 1.50 1.80 2.50 3.30 5.00 note 3 1.02 1.52 1.83 2.53 3.32 5.02 1.04 1.55 1.85 2.55 3.36 5.07 v output power (p out ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 1,2,3 v in = 18, 28, 40 volts, note 2 0 0 0 0 0 0 20 30 36 50 50 50 w output current (i out ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 1,2,3 v in = 18, 28, 40 volts, note 2 0 0 0 0 0 0 20 20 20 20 15.15 10 a line regulation (vr line ) 1,2,3 v in = 18, 28, 40 volts i out = 0, 50%, 100% rated -10 10 mv load regulation (vr load ) 1,2,3 i out = 0, 50%, 100% rated v in = 18, 28, 40 volts -0.5 0.5 % input current (i in ) 1,2,3 i out = 0, pin 3 open pin 3 shorted to pin 2 130 2.0 200 5.0 ma switching frequency (f s ) 1,2,3 sync. input (pin 4) open 450 500 550 khz
gh-series (28v input, single output) 3 2016-05-16 electrical performance characteristics (continued) for notes to electrical performance characteristics, refer to page 4. parameter group a subgroup conditions -55c ? t c ? +85c v in = 28v dc 5%, c l = 0 unless otherwise specified limits unit min nom max 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 80 20 600 10.0 0.5 80 khz v v v/? s % output ripple (v rip ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 1,2,3 i out = 100% rated load note 4 5 5 5 10 10 10 15 15 15 25 25 30 mvp-p efficiency (e ff ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 1 i out = 100% rated load 70 72 75 81 83 85 73 75 78 84 85 87 % inhibit input open circuit voltage drive current (sink) voltage range 1,2,3 note 1 3.0 -0.5 5.0 100 50 v ? a v current limit point expressed as a percentage of full rated load current 1,2,3 v out = 90% of nominal 125 135 % power dissipation, load fault (p d ) 1,2,3 short circuit, overload, note 6 17 25 w output response to step load changes (v tld ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 4,5,6 half load to/from full load, note 7 -300 -300 -300 -300 -300 -300 300 300 300 300 300 300 mvpk recovery time, step load changes (t tld ) gh2801s gh2801r5s gh2801r8s GH2802R5S gh2803r3s gh2805s 4,5,6 half load to/from full load, notes 7, 8 250 250 250 250 250 250 ? s output response to step line changes (v tln ) 4,5,6 24v to/from 32v i out = 100% rated load, notes 1, 9 -50 50 mvpk
gh-series (28v input, single output) 4 2016-05-16 electrical performance characteristics (continued) parameter group a subgroup conditions -55c ? t c ? +85c v in = 28v dc 5%, c l = 0 unless otherwise specified limits unit min nom max recovery time, step line changes (t tln ) 4,5,6 24v to/from 32v i out = 100% rated load, notes 1, 8, 9 200 ? s turn-on response overshoot (v osh ) turn-on delay (t dly ) 4,5,6 no load, full load note 10 0 250 5.0 mv ms capacitive load (c l ) 1 i out = 100% rated load no effect on dc performance notes 1, 5 5000 ? f line rejection 1 i out = 100% rated load dc to 50khz, note 1 40 60 db electromagnetic interference (emi), conducted emission (c e ) 1 i out = 100% rated load, note 1 per fig. 3 isolation 1 input to output or any pin to case except pin 13, test @ 100vdc 100 m ? device mass 110 g mtbf mil-hdbk-217f2, sf, 35c, note 11 5.8x10 6 hrs ? notes for electrical performance characteristics table 1. parameter is tested as part of design characterization or after design changes. thereafter, parameter shall be guaranteed to the limits specified. 2. parameter verified during line and load regulation tests. 3. these are beginning-of-life (bol) limit s. end-of-life (eol) limits are -3% and +3 % of nominal limit for min and max, respectively. 4. guaranteed for a d.c. to 20mhz bandwidth. tested using a 20khz to 10mhz bandwidth. 5. 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. 6. overload power dissipation is defined as the dev ice power dissipation with the load set such that v out = 90% of nominal. 7. load step slew rate ? 0.5a/? s. 8. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of its steady state value. 9. line step slew rate ?? 1.0v/ ? s. 10. turn-on delay time from either a step application of input power or a logic low to a logic high transition on the inhibit p in (pin 3) to the point where v out = 90% of nominal. 11. mil-hdbk mosfet failure rates replaced by empi rical failure rate data supplied by ir hirel. radiation performance characteristics test inspection method min typ unit total ionizing dose (gamma) mil-prf-883, method 1019.5 operating bias applied during exposure, half rated load, v in = 28v 100 krads(si) single event effects seu, sel, segr, seb heavy ions (let) operating bias applied during exposure, half rated load, v in = 18v, 28v & 50v test lab: cyclotron institute texas a & m university 82 mev ? cm 2 /mg ir hirel currently does not have a dla land and maritime certified radiation hardness assurance program.
gh-series (28v input, single output) 5 2016-05-16 efficiency vs. output current at 25oc, 5v output (gh2805s) 40 45 50 55 60 65 70 75 80 85 90 0246810 output current, a efficiency, % 18v vin 28v vin 40v vin fig. 1 ?typical efficiency vs output current @ 25c, 5v output (gh2805s) efficiency vs. temperature, 5v output (gh2805s) 50 55 60 65 70 75 80 85 90 0246810 output current, a efficiency, % -55oc 25oc 85oc fig. 2 ?typical efficiency vs temperature, 5v output (gh2805s)
gh-series (28v input, single output) 6 2016-05-16 fig. 4 - block diagram - single output fig. 3 ? emi ce03 specification limits and typical performance 1 2 3 input inhibit input return output output return 4 sync input -sense 13 sync output bias supply uvlo & inhibit emi filter peak current detection +12v oscillator pwm controller sample & hold feedback trigger case sense amplifier error amplifier +sense vfb ref & s.s. ref aout bout s.s. output adjust clk +9v sec. bias 6 11 12 5 7/8 9/10
gh-series (28v input, single output) 7 2016-05-16 application note: the gh-series converters have an output adjust pin (pin 12), which when connected via an external resistor (r adj ) to either the ?sense (pin 11) or +sense (pin 6), allows the nominal output voltage to be adjusted. use the following equations with the parameters listed in table 1 to calculate the required resistor value (r adj ). for all models , to adjust the output voltage higher: b- v - v a = r nom out adj ? where: r adj is in kohms r adj is connected to -sense and v nom < v out < 1.1v nom v nom is the nominal output voltage with the adjust pin left open v out is the desired output voltage a and b are parameters defined in table 1 for all models, to adjust the output voltage lower: b - a vc a = r out adj ? ? ? ? ? ? ? ? ? ? where: r adj is in kohms r adj is connected to +sense and d < v out < v nom v nom is the nominal output voltage with the adjust pin left open v out is the desired output voltage a, b, c and d are parameters defined in table 1 table 1. equation parameters by model model equation parameters a b c d gh2801s 0.714 14.3 5.0 0.965 gh2801r5s 0.937 12.6 3.33 1.425 gh2801r8s 1.047 11.5 2.78 1.689 GH2802R5S 1.25 10 2.0 2.292 gh2803r3s 1.425 8.34 1.52 2.937 gh2805s 1.667 6.68 1.0 4.233
gh-series (28v input, single output) 8 2016-05-16 pin designation mechanical outline ? pin # designation pin # designation 1 input 8 output 2 input return 9 output return 3 inhibit 10 output return 4 sync input 11 - sense 5 sync output 12 output adjust 6 + sense 13 case 7 output standard microcircuit drawing equivalence table standard microcircuit drawing number ir standard part number 5962-1021701kxx gh2803r3s/ckx 5962-1021901kxx gh2805s/ckx 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
gh-series (28v input, single output) 9 2016-05-16 device screening notes: ? best commercial practice. ?? ck is a dla land and maritime (formerly dscc) part markin g used to designate a class k compliant hybrid. the ck marking does not indicate the hybrid is radiation certified. no suffix is a radiation rated device but not available as a dla qualified smd per mil-prf-38534. ? any engineering model (em) build with the ?em? suffix shall only be form, fit and functional equivalent to its flight model (fm) counterpart, and it may not meet the radiation perfor mance. the em model shall not be expected comply with mil- prf-38534 flight quality/workmanshi p standards, and configuration control. an em build may use electrical equivalent commercial grade components. ir hirel will provide a list of non-compliance items upon request. part numbering requirement mil-std-883 method no suffix ? em ? temperature range ? -55c to +85c -55c to +85c element evaluation mil-prf-38534 class k n/a non-destructive bond pull 2023 yes n/a internal visual 2017 yes ? temperature cycle 1010 cond c cond c constant acceleration 2001, y1 axis 3000 gs 3000 gs pind 2020 cond a n/a burn-in 1015 320 hrs @ 125c (2 x 160 hrs) 48 hrs @ 125c final electrical (group a) mil-prf-38534 & specification -55c, +25c, +85c -55c, +25c, +85c pda mil-prf-38534 2% n/a seal, fine and gross 1014 cond a, c cond a radiographic 2012 yes n/a external visual 2009 yes ? ck ? -55c to +85c class k yes yes cond c 3000 gs cond a 320 hrs @ 125c (2 x 160 hrs) -55c, +25c, +85c 2% cond a, c yes yes ir hirel headquarters: 101 n. sepulveda blvd., el segundo, california 90245, usa tel: (310) 252-7105 ir hirel leominster: 205 crawford st., leominster, massac husetts 01453, usa tel: (978) 534-5776 ir hirel san jose: 2520 junction avenue, san jose, california 95134, usa tel: (408) 434-5000 data and specifications subject to change without notice.
gh-series (28v input, single output) 10 2016-05-16 important notice the information given in this document shall be in no event regarded as guarantee of conditions or characteristic. the data contained herein is a characterization of the co mponent based on internal standards and is intended to demonstrate and provide guidance for typical part performan ce. it will require further evaluation, qualification and analysis to determine suitability in the application environm ent to confirm compliance to your system requirements. with respect to any example hints or any typical values stat ed herein and/or any information regarding the application of the product, infineon technologies hereby disclaims any and a ll warranties and liabilities of any kind including without limitation warranties on non- infringement of inte llectual property rights and any third party. in addition, any information given in this document is subject to customer?s compliance with its obligations stated in this document and any applicable legal requirements, norms and standards concerning customer ?s product and any use of the product of infineon technologies in customer?s applications. the data contained in this document is exclusively intended fo r technically trained staff. it is the responsibility of any customer?s technical departments to evaluate the suitab ility of the product for the intended applications and the completeness of the product information given in this document with respect to applications. for further information on the product, technology, delivery terms and conditions and prices, please contact your local sales representative or go to ( www.infineon.com/hirel). warning due to technical requirements products may contain dangerou s substances. for information on the types in question, please contact your nearest infineon technologies office.
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