PD-97440C GH-SERIES HIGH RELIABILITY, HIGH EFFICIENCY RADIATION HARDENED DC-DC CONVERTER 28V Input, Single Output 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 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. 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 capacitor with 50V rating is used for incircuit 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 carbidealuminum (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. www.irf.com GH Features n n n n n n n n n n n n n n n n n Total Ionizing Dose (TID) > 100 KRad(Si) SEE Hardened to LET Level > 82 MeV.cm2/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% -55°C to +85°C Operating Temperature Range 100MΩ @ 100VDC Isolation Under-Voltage Lockout Short Circuit and Overload Protection Output Voltage Adjust Synchronization Output and Input Remote Sense External Inhibit Applications n n n Deep Space Satellites / Probes Strategic Weapons and Communication System Geostationary Earth Orbit Satellites (GEO) Manufactured in a facility fully qualified to MILPRF-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. Non-flight versions of the GH-Series converters are available for system development purposes. Variations in electrical specifications and screening to meet custom requirements can be accommodated. 1 10/12/12 GH-SERIES (28V Input, Single Output) Specifications Absolute Maximum Ratings Recommended Operating Conditions Input voltage range Output power Lead temperature Operating temperature Storage temperature Input voltage range Output power Operating temperature -0.5Vdc to +50Vdc Internally limited +300°C for 10 seconds -55°C to +125°C -55°C to +135°C Operating temperature 1 +18Vdc to +40Vdc 0 to Max. Rated -55°C to +85°C -55°C to +80°C 1 Meets derating per MIL-STD-975 Electrical Performance Characteristics Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Input Voltage Output Voltage (Vout) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S Output power (POUT) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S Output current (IOUT) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S 1 1 1 1 1 1 IOUT = 100% rated load Limits Unit Min Nom 18 28 Note 3 0.98 1.48 1.77 2.47 3.28 4.98 1.00 1.50 1.80 2.50 3.30 5.00 0.96 1.45 1.75 2.45 3.24 4.93 2,3 2,3 2,3 2,3 2,3 2,3 VIN = 18, 28, 40 Volts, Note 2 1,2,3 VIN = 18, 28, 40 Volts, Note 2 1,2,3 Max 40 V 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 0 0 0 0 0 0 20 30 36 50 50 50 0 0 0 0 0 0 20 20 20 20 15.15 10 V W A Line regulation (VRLINE) 1,2,3 VIN = 18, 28, 40 Volts IOUT = 0, 50%, 100% rated -10 10 mV Load regulation (VRLOAD) 1,2,3 IOUT = 0, 50%, 100% rated VIN = 18, 28, 40 Volts -0.5 0.5 % Input current (IIN) 1,2,3 IOUT = 0, Pin 3 open 130 200 mA Pin 3 shorted to pin 2 2.0 5.0 For Notes to Electrical Performance Characteristics, refer to page 4 2 www.irf.com GH-SERIES (28V Input, Single Output) Electrical Performance Characteristics Parameter Switching frequency (FS) Synchronization Input frequency range pulse high level pulse low level pulse transition time pulse duty cycle Output ripple (VRIP) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S Efficiency (EFF) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S Inhibit Input open circuit voltage drive current (sink) voltage range Group A Subgroup Min Nom Max 1,2,3 Sync. Input (Pin 4) open 450 500 550 KHz Ext. Clock on Sync. Input (Pin 4) Note 1 450 4.0 -0.5 80 20 600 10.0 0.5 KHz V V V/µs % IOUT = 100% rated load 1 1,2,3 1,2,3 Turn-on Response Overshoot (VOSH) Turn-on Delay (TDLY) Note 1 80 5 5 5 10 10 10 70 72 75 81 83 85 15 15 15 25 25 30 73 75 78 84 85 87 3.0 -0.5 Power dissipation, load fault (PD) Output response to step load changes (VTLD) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S Recovery time, step line changes (TTLN) Unit 1,2,3 1,2,3 Output response to step line changes (VTLN) Limits IOUT = 100% rated load Note 4 Current Limit Point Expressed as a percentage of full rated load current Recovery time, step load changes (TTLD) GH2801S GH2801R5S GH2801R8S GH2802R5S GH2803R3S GH2805S ( continued ) Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified mV p-p % 5.0 100 50 V µA V Vout = 90% of Nominal 125 135 % Short Circuit, Overload, Note 6 17 25 W Half Load to/from Full Load, Note 7 -300 -300 -300 -300 -300 -300 4,5,6 300 300 300 300 300 300 mV pk Half Load to/from Full Load, Notes 7, 8 250 250 250 250 250 250 4,5,6 4,5,6 4,5,6 4,5,6 24V to/from 32V IOUT = 100% rated load, Notes 1, 9 -50 24V to/from 32V IOUT = 100% rated load, Notes 1, 8, 9 No Load, Full Load Note 10 0 µs 50 mV pk 200 µs 250 5.0 mV ms For Notes to Electrical Performance Characteristics, refer to page 4 www.irf.com 3 GH-SERIES (28V Input, Single Output) Electrical Performance Characteristics Parameter Capacitive Load (CL) Line Rejection Electromagnetic Interference (EMI), conducted emission (CE) Isolation ( continued ) Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C V IN = 28V DC ± 5%, CL = 0 unless otherwise specified 1 IOUT = 100% rated load No effect on DC performance Notes 1, 5 1 IOUT = 100% rated load DC to 50KHz, Note 1 1 IOUT = 100% rated load, Note 1 1 Input to Output or Any Pin to Case except pin 13, test @ 100VDC Limits Unit Min Nom 5000 40 60 µF dB Per Fig. 3 100 MΩ Device Mass MTBF Max 110 MIL-HDBK-217F2, SF, 35°C, Note 11 6 g Hrs 5.8x10 Notes for the 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) limits. 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 device power dissipation with the load set such that VOUT = 90% of nominal. 7. Load step slew rate ≤ 0.5A/µs. 8. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of its steady state value. 9. Line step slew rate ≤1.0V/µs. 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 pin (pin 3) to the point where VOUT = 90% of nominal. 11. MIL-HDBK MOSFET failure rates replaced by empirical failure rate data supplied by International Rectifier. Radiation Performance Characteristics Test Conditions Min Typ Unit MIL-PRF-883, Method 1019.5 Total Ionizing Dose (Gamma) Operating bias applied during exposure, Half Rated Load, VIN = 28V 100 Krads(Si) 82 MeVxcm /mg Heavy Ions (LET) Single Event Effects Operating bias applied during exposure, SEU, SEL, SEGR, SEB Half Rated Load, VIN = 18V, 28V & 50V 2 Test lab: Cyclotron Institute, Texas A & M University International Rectifier currently does not have a DLA Land and Maritime certified Radiation Hardness Assurance Program. 4 www.irf.com GH-SERIES (28V Input, Single Output) Fig. 1 –Typical Efficiency vs Output Curent @ 25°C, 5V Output (GH2805S) 90 Efficiency vs. Output Current at 25ºC, 5V Output (GH2805S) 85 Efficiency, % 80 75 70 65 18V Vin 28V Vin 40V Vin 60 55 50 45 40 0 2 4 6 8 10 Output Current, A Fig. 2 –Typical Efficiency vs Temperature, 5V Output (GH2805S) Efficiency vs. Temperature, 5V Output (GH2805S) 90 85 Efficiency, % 80 75 -55ºC 25ºC 85ºC 70 65 60 55 50 0 2 4 6 8 10 Output Current, A www.irf.com 5 GH-SERIES (28V Input, Single Output) Fig. 3 – EMI CE03 Specification Limits and Typical Performance Fig. 4 Block Diagram - Single Output 7/8 PEAK CURRENT DETECTION EMI FILTER Input 1 Output 9/10 Inhibit 3 UVLO & INHIBIT Output Return BIAS +12V SUPPLY Case 13 Input 2 Return +9V Sec. Bias SENSE AMPLIFIER ERROR AMPLIFIER Ref Sync 4 Input Sync 5 Output 6 OSCILLATOR REF & S.S. Aout PWM Bout CONTROLLER Vfb Clk S.S. 6 +Sense 11 -Sense 12 Output Adjust SAMPLE & HOLD FEEDBACK TRIGGER www.irf.com GH-SERIES (28V Input, Single Output) Application Note: The GH-Series converters have an Output Adjust pin (pin 12), which when connected via an external resistor (RADJ) 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 (RADJ). For all Models, to adjust the output voltage higher: R ADJ = 2× A -B V OUT - V NOM where: RADJ is in Kohms RADJ is connected to -sense and VNOM < VOUT < 1.1VNOM VNOM is the nominal output voltage with the Adjust Pin left open VOUT is the desired output voltage A and B are parameters defined in Table 1 For all Models, to adjust the output voltage lower: R ADJ = where: 1 ⎛ ⎞ A ⎜ − 0.5 ⎟⎟ ⎜ C (V ⎝ OUT − A) ⎠ -B RADJ is in Kohms RADJ is connected to +sense and D < VOUT < VNOM VNOM is the nominal output voltage with the Adjust Pin left open VOUT 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 www.irf.com 7 GH-SERIES (28V Input, Single Output) Mechanical Diagram 3.055 MAX. 0.500 0.080 Max. 2.00 R0.0625 4 places 0.30 0.50 0.20 13 1 12 2 11 10 0.60 9 3 8 4 7 5 6 2.055 MAX. 2.30 2.500 0.200 Typ. Noncum. 1.400 Ref. Pin Ø0.040 0.45 1.10 0.260 FLANGE DETAIL 3.50 Ref. 5 62 .0 R0 0.25 0.25 0.14 0.475 MAX. 0.40 Tolerance : .XX .XXX ±0.01 ±0.005 Pin Designation 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 7 + Sense Output 13 Case Standard Microcircuit Drawing Equivalence Table 8 Standard Microcircuit IR Standard Drawing Number Part Number 5962-1021701KXX GH2803R3S/CKX 5962-1021901KXX GH2805S/CKX www.irf.com GH-SERIES (28V Input, Single Output) Device Screening Requirement MIL-STD-883 Method Temperature Range No Suffix d CK d -55°C to +85°C -55°C to +85°C EM -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 c 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 Burn-In 1015 ( 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 c Notes: c d Best commercial practice. 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 Martime qualified SMD per MIL-PRF-38534. International Rectifier currently does not have a DLA Land and Maritime certified Radiation Hardness Assurance Program. Part Numbering GH 28 05 S /XX X Model Nominal Input Voltage 28 = 28V Output Voltage 01 = 1V, 01R5 = 1.5V 01R8 = 1.8V, 02R5 = 2.5V 03R3 = 3.3V, 05 = 5V 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 depending on availability Screening Level (Please refer to Screening Table) No Suffix, EM, CK Number of Outputs S = Single 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. 10/2012 www.irf.com 9