M3H

M3H_15 IRF | Alldatasheet

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Technical content

Features

+28V Input, Single/Dual Output The M3H-Series of DC/DC converters are radiation tolerant, high reliability devices designed for moderate radiation environments such as those encountered by low earth orbit satellites and launch vehicles. For higher radiation environments, the M3G-Series of DC/DC converters is recommended. System upgrades to higher radiation tolerance applications can be easily accommodated with the M3G-Series converters because they have the same mechanical outline and are pin compatible. For physically smaller, lower output power single and dual output applications the M3L-Series of DC/DC converters are recommended. Features of the M3H-Series include up to 40 watt output power, small size, low weight and 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 derated to meet the requirements of MIL-STD-975 and MIL-STD-1547. Extensive documentation including Radiation Susceptibility, Thermal Analysis, Stress Analysis and MTBF are available. The converters incorporate a fixed frequency single forward topology with magnetic feedback and an internal EMI filter. These converters are capable of meeting the conducted emissions and conducted susceptibility requirements of MIL-STD-461C without any additional components. All models include an external inhibit port and have an adjustable output voltage. They are enclosed in a hermetic 3.0" x 2.5" x 0.445" steel package and weigh less than 125 grams. The package utilizes rugged ceramic feed-through copper core pins and is sealed using parallel seam welding. Manufactured in a facility fully qualified to MIL-PRF- 38534, these converters are fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet.

Applications

/G110/G32Low Earth Orbit Satellites (LEO) /G110/G32Launch Vehicles Non-flight versions of the M3H-Series converters are available for system development purposes. Variations in electrical specifications and screening to meet custom requirements can be accommodated. Consult IR Santa Clara for special requirements. M3H PD-94437D

2 www.irf.com M3H-SERIES The M3H-Series converters utilize a single 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 provides high line rejection. 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. 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 17 volts and will shut down when the input voltage drops below 16 volts. The one volt 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 converter’s operation is inhibited when this pin is pulled low. It is intended to be driven by an open collector logic device. The pin may be left open for normal operation and has a nominal open circuit voltage of 10.5V with respect to the input return (pin 2). Single output models feature remote sense to automatically correct for voltage drops between the converter output anf the load. The output voltage of dual output models can be adjusted using a single external resistor. Design Methodology The M3H-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. Heavy derating of the power MOSFET gate and drain voltages minimize the possibility of SEGR and SEB. A magnetic feedback circuit is utilized instead of opto- couplers to minimize temperature, radiation and aging sensitivity. PSPICE was used extensively to predict and optimize circuit performance for both beginning and end-of-life. Thorough design analyses include Radiation Susceptibility ( TREE ), Stress, Thermal, and Reliability ( MTBF ).

www.irf.com 3 M3H-SERIES Meets derating per MIL-STD-975 For operation at +125°C see table note 13 Electrical Performance Characteristics For Notes to Specifications, refer to page 5 Input voltage range -0.5Vdc to +60Vdc Input voltage range +18Vdc to +40Vdc Output power Internally limited Input voltage range 1 +18Vdc to +38Vdc Lead temperature +300°C for 10 seconds Output power 0 to Max. Rated Operating temperature -55°C to +135°C Operatin g temperature 2 -55°C to +125°C Storage temperature -55°C to +135°C Operating temperature 1 -55°C to +70°C Recommended Operating Conditions Absolute Maximum Ratings Specifications 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 18 28 40 V Output Voltage ( Vout ) M3H2803R3S M3H2805S M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D M3H2803R3S M3H2805S M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D 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 3.27 4.95 5.17 11.88 14.85 ±4.95 ±11.88 ±14.85 3.23 4.90 5.13 11.76 14.70 ±4.90 ±11.76 ±14.70 3.30 5.00 5.20 12.00 15.00 ±5.00 ±12.00 ±15.00 3.33 5.05 5.23 12.12 15.15 ±5.05 ±12.12 ±15.15 3.37 5.10 5.27 12.24 15.30 ±5.10 ±12.24 ±15.30 V Output power ( POUT ) M3H2803R3S All Others 1,2,3 VIN = 18, 28, 40 Volts, Note 2 W Output current ( IOUT ) M3H2803R3S M3H2805S M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D 1,2,3 V IN = 18, 28, 40 Volts, Note 2 Either Output, Note 3 Either Output, Note 3 Either Output, Note 3 9.10 8.00 7.70 3.34 2.67 6.40 2.67 2.14 A Line regulation ( VRLINE ) 1,2,3 V IN = 18, 28, 40 Volts IOUT = 0, 50%, 100% rated, Note 4 -0.5 0.5 % Load regulation ( VRLOAD ) 1,2,3 I OUT = 0, 50%, 100% rated, Note 4 VIN = 18, 28, 40 Volts -1.0 1.0 % Cross regulation ( VRCROSS ) M3H2805D M3H2812D M3H2815D 1,2,3 Duals only, Note 5 V IN = 18, 28, 40 Volts -5.0 -3.0 -3.0 5.0 3.0 3.0

4 www.irf.com M3H-SERIES Electrical Performance Characteristics ( continued ) For Notes to Specifications, refer to page 5 Limits Parameter Group A Subgrou p Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Output Ripple ( Vrip) M3H2803R3S M3H2805S M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D 1,2,3 V IN = 18, 28, 40 Volts IOUT = 100% rated load Notes 4, 6 mV p-p Input current, no load ( IIN ) M3H2803R3S M3H2805S 125 M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D 1,2,3 I OUT = 0, Pin 4 open 100 100 mA Input current inhibited 1,2,3 Pin 4 shorted to pin 2 8.0 mA Switching frequency ( FS ) 1,2,3 450 500 550 KHz Efficiency ( EFF ) M3H2803R3S M3H2805S M3H2805R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D 1,2,3 IOUT = 100% rated load Note 4 Enable Input ( Inhibit Function ) open circuit voltage drive current ( sink ) voltage range 1,2,3 Note 1 9.5 -0.5 11.5 500 V µA V Current Limit Point Expressed as a percentage of full rated load current 1,2,3 V out = 90% of Nominal, Note 4 105 130 % Power dissipation, load fault (PD) M3H2815D All others 1,2,3 Short Circuit, Overload, Note 8 W Output response to step load changes (V TLD) 4,5,6 Half Load to/from Full Load, Notes 4,9 -300 300 mV pk Recovery time, step load changes (TTLD) 4,5,6 Half Load to/from Full Load, Note 4,9,10 200 µs Output response to step line changes (VTLN) 4,5,6 18V to/from 40V IOUT = 100% rated load, Notes 1,4,11 -300 300 mV pk Recovery time, step line changes (TTLN) 4,5,6 18V to/from 40V IOUT = 100% rated load, Notes 1,4,10,11 200 µs Turn-on Response Overshoot (VOS) Turn-on Delay (TDLY) 4,5,6 No Load, Full Load for Dual Notes 4,12 2.0 ms Overshoot (VOS) Turn-on Delay (TDLY) 4,5,6 20 % Load, Full Load for Single Notes 4,12 2.0 ms

www.irf.com 5 M3H-SERIES Electrical Performance Characteristics ( continued ) Notes. Electrical Performance Characteristics 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) Output load current must be distributed such that at least 20% of the total load current is being provided by one of the outp uts. 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 using the circuit shown below. 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 µs. 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 µs. 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 pi n (pin 4) to the point where VOUT = 90% of nominal. 13) For operation at temperatures between +85°C and +125°C, derate the maximum output power linearly from 100% to 75%. Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL =0 Unless otherwise specified Min Nom Max Unit Capacitive Load (CL) M3H2803R3S M3H2805S M3H2005R2S M3H2812S M3H2815S M3H2805D M3H2812D M3H2815D IOUT = 100% rated load No effect on DC performance Notes 1, 4, 7 Each output on duals 2200 1000 1000 180 120 500 µF Line Rejection 1 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 3, test @ 500VDC 100 MΩ Device Weight 125 g MTBF MIL-HDBK-217F2, SF, 35°C 1.5 x 106 Hr

6 www.irf.com M3H-SERIES Radiation Performance Characteristics Test Conditions Min Typ Highest Level Tested Unit Total Ionizing Dose ( Gamma ) MIL-STD-883, Method 1019 Operating bias applied during exposure, Full Rated Load, VIN = 28V 25 40 60 Krads (Si) Single Event Effects SEU, SEL, SEGR, SEB Heavy ions (LET) Operating bias applied during exposure, Full Rated Load, V IN = 28V 37 82 82 MeV•cm /mg Dose Rate ( Gamma Dot ) Temporary Saturation Survival MIL-STD-883, Method 1023 Operating bias applied during exposure, Full Rated Load, VIN = 28V 1E8 1E10 1.5E9 Rads (Si)/sec Neutron Fluence MIL-STD-883, Method 1017 3E12 8E12 Neutrons /cm Proton Fluence E > 10MeV TBD N/A protons /cm Full Rated Load OUTPUT RETURN DUT 50 ohm Back Term. 0.1 uF 50 ohm Coax. 50 ohm Term. 1 uF Oscilloscope or Equivalent with 10 MHz Bandwidth. Multiply readings by 2. Note : Specification guaranteed to 20MHz Bandwidth. Circuit for Measuring Output Ripple Voltage International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program.

Figure 1. Block Diagram - Single Output Figure 2. Block Diagram - Dual Output

6 CASE

Figure 5. Line Rejections, 28Vdc + 8Vac-p

10 www.irf.com M3H-SERIES 3.00 0.500 2.000 0.450 1.100 2.5002.300 0.200 Typ. Non-cum. 0.300 1.400 Ref. 3.50 Ref.

0.445 Max

0.080 Max. 0.260 Pin Ø0.040 R0.0625 4 places 0.500 0.600 0.200 Tolerance : .XX ±0.01 .XXX ±0.005 0.25 3.00 2.000 Mechanical Outline Pin Designation (Single/Dual) Pin # Single Pin # Dual 1 + Input 1 + Input

2 Input Return 2 Input Return

3 Inhibit 3 Inhibit

6 Case Ground 6 Case Ground

11 NC 11 - Output

12 Output Return 12 Output Return

www.irf.com 11 M3H-SERIES Part Numbering WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information . Data and specifications subject to change without notice. 09/2006 M3H 28 05 S /EM Model Input Voltage Nominal 28 = 28V Output Voltage 03R3 = 3.3V, 05 = 5V 12 = 12V, 15 = 15V Output S = Single D = Dual Screening Level (Please refer to Screening Table) No suffix, EM Device Screening Requirement MIL-STD-883 Method No Suffix EM Temperature Range -55°C to +85°C -55°C to +85°C Element Evaluation MIL-PRF-38534 Class H w/SEM N/A Non-Destructive Bond Pull 2023 Yes N/A Internal Visual 2017 Yes /c99 Temperature Cycle 1010 Cond C Cond C Constant Acceleration 2001, Y1 Axis 3000 Gs 3000 Gs PIND 2020 N/A N/A Burn-In 1015 160 hrs @ 125°C 48 hrs @ 125°C Final Electrical MIL-PRF-38534 -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +85°C +85°C PDA MIL-PRF-38534 N/A N/A Seal, Fine and Gross 1014 A1, C Cond A Radiographic 2012 N/A N/A External Visual 2009 Yes /c99 Notes: /c99 Best commercial practice. International Rectifier currently does not have a DSCC certified Radiation Hardness Assurance Program