M3G500515TEMA

M3G5003R305T IRF | Alldatasheet

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Technical content

Features

50V Input, Triple Output

Applications

/G110/G32Geostationary Earth Orbit Satellites (GEO) Non-flight versions of the M3G-Series converters are available for system development purposes. Variations in electrical specifications and screening to meet custom requirements can be accommodated. The M3G-Series of DC-DC 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. /G110/G32Deep Space Satellites / Probes /G110/G32Strategic Weapons and Communication Systems 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 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 (AlSiC) 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. HYBRID-HIGH RELIABILITY RADIATION HARDENED DC-DC CONVERTER 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. M3G PD-94559M

2 www.irf.com M3G-SERIES (50V Input, Triple Output) Circuit Description 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. The current limit point exhibits a slightly negative temperature coefficient to reduce the possibility of thermal runaway. 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 36 volts and will shut down when the input voltage drops below 34 volts. This two volts 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 Synchronization input and output allow multiple converters to operate at a common switching fre- quency. 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. An internal EMI filter reduces the conducted emissions to less than 5mA rms on the input power leads. A two stage output filter reduces the typical output ripple to less than 20mV peak-to-peak. The main (+5 volt) output is regulated by the control loop and typically exhibits better than 1% regulation. The auxiliary (±12 volt or ±15 volt) outputs are maintained through tight coupling in the power transformer and main output filter inductor and typically exhibit better than 5% regulation. The main output and auxiliary outputs are isolated from each other. The M3G-Series was developed using a proven conservative design methodology which includes selecting radiation tolerant and established reliability components and fully derating to the requirements of MIL-STD-975 and MIL-STD-1547 except for the CDR type ceramic capacitors, a capacitor with 50V rating is used for in-circuit voltage stress of less than 10V. Careful sizing of decoupling capacitors and current limiting resistors minimizes the possibility of photo-current burn-out. Heavy derating of the radiation hardened power MOSFET virtually eliminates the possibility of SEGR and SEB. A magnetic feedback circuit is utilized instead of opto- couplers to minimize temperature, radiation and aging sensitivity. PSPICE and RadSPICE were used extensively to predict and optimize circuit performance for both beginning and end-of-life. Thorough design analyses include Radiation Susceptibility (TREE ), Worst Case, Stress, Thermal, Failure Modes and Effects (FMEA) and Reliability (MTBF). The M3G-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 20% over the nominal regardless of the line voltage.

www.irf.com 3 M3G-SERIES (50V Input, Triple Output) Electrical Performance Characteristics Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Input Voltage 1, 2, 3 Note 2 V Output Voltage ( Vout ) (main) M3G500512T (aux.) M3G500515T (aux.) (main) M3G500512T (aux.) M3G500515T (aux.) 2, 3 IOUT = 100% rated load, Note 5 IOUT = 100% rated load, Note 5 4.98 ±11.50 ±14.60 4.93 ±11.30 ±14.40 5.00 ±11.80 ±14.90 5.02 ±12.10 ±15.20 5.07 ±12.30 ±15.40 V Output power ( POUT ) 1, 2, 3 VIN = 38, 50, 60 Volts, Note 2 W Output current ( I OUT ) (main) M3G500512T (aux.) M3G500515T (aux.) 1, 2, 3 VIN = 38, 50, 60 Volts, Notes 2,3,4,5 400 ±83 ±67 4000 ±833 ±667 mA Line regulation ( VRLINE ) (main) M3G500512T (aux.) M3G500515T (aux.) 1, 2, 3 IOUT = 10%, 50%, 100% rated VIN = 38, 50, 60 Volts Note 5 -10 -120 -150 120 150 mV Load regulation ( VRLOAD ) (main) M3G500512T (aux.) M3G500515T (aux.) 1, 2, 3 IOUT = 10%, 50%, 100% rated VIN = 38, 50, 60 Volts Notes 5,13 -50 -400 -500 400 500 mV Cross regulation ( VRCROSS ) (main) M3G500512T (aux.) M3G500515T (aux.) 1, 2, 3 VIN = 38, 50, 60 Volts IOUT = 2.5A to 1A and 2.5 to 4A on main output and ±half rated on aux. outputs -3.5 -3.0 3.5 3.0 For Notes to Electrical Performance Characterstics Table, refer to page 5 Input voltage range -0.5Vdc to +80Vdc Input voltage range +38Vdc to +60Vdc Output power Internally limited Output power 0 to Max. Rated Lead temperature 300°C for 10 seconds Operating case temperature -55°C to +125°C Operating temperature -55°C to +135°C Storage temperature -55°C to +135°C Recommended Operating Conditions Absolute Maximum Ratings Specifications For operation at +125°C see table note 15

4 www.irf.com M3G-SERIES (50V Input, Triple Output) Electrical Performance Characteristics ( continued ) For Notes to Electrical Performance Characterstics Table, refer to page 5 Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Input current ( IIN ) 1, 2, 3 IOUT = 0, Pin 3 open Pin 3 shorted to pin 2 5.0 mA Output ripple ( VRIP ) (main) M3G500512T (aux.) M3G500515T (aux.) 1, 2, 3 VIN = 38, 50, 60 Volts IOUT = 100% rated load, Notes 5, 6 mV p-p Switching frequency ( F S ) 1, 2, 3 Sync. Input (Pin 4) open 450 500 550 KHz Efficiency ( Eff) 1, 2, 3 IOUT = 100% rated load Note 5 Inhibit Input open circuit voltage drive current ( sink ) voltage range Note 1 3.0 -0.5 5.0 100 V µA 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 -0.5 600 0.5 KHz V V V/µs Current Limit Point Expressed as a percentage of full rated output power 1, 2, 3 Vout = 90% of Nominal, Note 5 135 Power dissipation, load fault (P 1, 2, 3 Short Circuit, Overload, Note 8 W Output response to step load changes (VTLD) 4, 5, 6 Half Load to/from Full Load, Notes 5,9 -300 300 mV pk Recovery time, step load changes (TTLD) 4, 5, 6 Half Load to/from Full Load, Note 5,9,10 100 µs Output response to step line changes (VTLN) 18V to/from 50V IOUT = 100% rated load, Notes 1,5,11 -300 300 mV pk Recovery time, step line changes (T TLN) 18V to/from 50V IOUT = 100% rated load, Notes 1,5,10,11 100 µs

www.irf.com 5 M3G-SERIES (50V Input, Triple Output) Electrical Performance Characteristics ( continued ) Notes: Electrical Performance Characteristics Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Turn-on Response Overshoot (VOS) (main) M3G500512T (aux.) M3G500515T (aux.) Turn-on Delay (T DLY) 4, 5, 6 No Load, Full Load Notes 5,12 1.0 500 750 1000 5.0 mV ms Capacitive Load (CL) (main) (Each aux. output) IOUT = 100% rated load, No effect on DC performance, Notes 1, 5, 7 1000 200 µF Line Rejection IOUT = 100% rated load DC to 50KHz, Notes 1, 5 dB Isolation Input to Output or Any Pin to Case except pin 10, test @ 500VDC 100 MΩ Device Weight 110 g MTBF MIL-HDBK-217F2, SF, 35ºC 5 x 10 Hrs 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. Although operation with no load is permissible, light loading on the main (+5 volt) output may cause the output voltage of th e auxiliary outputs(±12 volt or ±15 volt) to drop out of regulation. It is therefore recommended that at least 200 mA or 20 perce nt of the total output power, whichever is greater, be taken from the main (+5 volt) output. 4. Although operation with no load is permissible, heavy loading on the main (+5 volt) output may cause the output voltage of th e auxiliary outputs(±12 volt or ±15 volt) to rise out of regulation. It is therefore recommended that at least 50 mA or 20 percen t of the total output power, whichever is greater, be taken from the auxiliary (±12 volt or ±15 volt) outputs. 5. Unless otherwise specified, “Rated” load is 20W on the main (+5 volt) output and 10 watts each on the auxiliary (±12 volt or ±15 volt) outputs. Load currents of up to 5A and ±1A on the main and auxiliary outputs respectively are acceptable as long as the total output power does not to exceed 40 watts. 7. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. 8. A capacitive load in excess of the maximum limit may interfere with the proper operation of the converter’s overload protecti on, causing erratic behavior during turn-on. 9. Overload power dissipation is defined as the device power dissipation with the load set such that V OUT = 90% of nominal. 10. Load step transition time /G179 10 µs. 11. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1% of its steady state value. 12. Line step transition time /G179 100 µs. 13. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on the inhibit pi n(pin3 to the point where VOUT = 90% of nominal. 14. Load is varied for output under test while the remaining outputs are loaded at 50% of rated. Regulation relative to output voltage at 50% rated load. 15. Although operation at temperatures between +85°C and +125°C is guaranteed, no parametric limits are specified.

10 CASE

Figure 1. Block Diagram

8 www.irf.com M3G-SERIES (50V Input, Triple Output) Ensure that flatness of the plate where M3G 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 M3G-series converter requires either M3 or 4-40 size screws for attachment purposes. The procedure for mounting the converter is as follows: 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 in·oz) in the sequence shown below. Application Note: A) Attachment of the Converter 5. Tighten the screws with an appropriate torque driver. Torque the screws up to 6 in·lb in the sequence shown above. The following procedure is recommended for mounting the converter for optimum cooling and to circumvent any potential damage to the converter.

www.irf.com 9 M3G-SERIES (50V Input, Triple Output) Mechanical Diagram Pin Designation (Triple) Pin # Designation Pin # Designation 1 + Input 8 NC

2 Input Return 9 NC

3 Inhibit 10 Case Ground

4 Sync. Input 11 - Aux. Output 5 Sync. Output 12 Aux. Output Return 6 Main Return 13 +Aux. Output 7 + Main Output 3.055 MAX. 0.500 2.00 0.45 1.10 2.5002.30 0.200 Typ. Non- cum. 0.30 1.400 Ref. 3.50 Ref. 0.475 MAX. 0.080 Max. 0.260 Pin Ø0.040 R0.0625 4 places 0.50 0.60 0.20 Tolerance : .XX ±0.01 .XXX ±0.005 0.25 2.055 MAX. FLANGE DETAIL 0.40 0.25 0.14 R0.0625

10 www.irf.com M3G-SERIES (50V Input, Triple Output) Part Numbering Device Screening Requirement MIL-STD-883 Method No Suffix /c100 CK /c100 EM Temperature Range -55°C to +85°C -55°C to +85°C -55°C to +85°C 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 /c99 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 @ 125°C 320 hrs @ 125°C 48 hrs @ 125°C ( 2 x 160 hrs ) ( 2 x 160 hrs ) Final Electrical MIL-PRF-38534 -55°C, +25°C, -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +85°C +85°C +85°C 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 /c99 Burn-In 1015 WORLD HEADQUARTERS: 233 Kansas St., 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. 09/2012 Main Output Voltage Model Nominal Input Voltage 50 = 50V Screening Level (Please refer to Screening Table) No Suffix, CK, EM 03R3 = 3.3V 05 = 5V 12 = 12V 15 =15V Output T = Triple M3G 50 05 15 T /XX X Auxiliary Output Voltage 05 = ± 5V, 12 = ± 12V 15 = ± 15V 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 Notes: /c99 Best commercial practice. /c100 CK is a DLA Land and Maritime (formerly DSCC) part marking 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 Land and Maritime qualified SMD per MIL-PRF-38534. International Rectifier currently does not have a DLA Land and Maritime certified Radiation Hardness Assurance Program.