PD - 94689 AMF28XXS SERIES 28V Input, Single Output ADVANCED ANALOG RADIATION TOLERANT DC/DC CONVERTERS Description The AMF28XXS series of DC/DC converter modules has been specifically designed for operation in moderate radiation environments supplementing the higher radiation performance available in the Advanced Analog ART, ARH and G-Series converters. Environments presented to space vehicles operating in low earth orbits, launch boosters, orbiting space stations and similar applications requiring a low power, high performance converter with moderate radiation hardness performance will be optimally served by the AMF28XXS Series. The physical configuration of the AMF28XXS series permits mounting directly to a heat dissipation surface without the necessity of signal leads penetrating the heat sink surface. This package configuration permits greater independence in mounting and more mechanical security than traditional packages. Advanced Analog’s rugged ceramic seal pins are used exclusively in the package thereby assuring long term hermeticity. The AMF28XXS has been designed for high density using chip and wire hybrid technology that complies with the class H requirements of MIL-PRF-38534. Finished product are fabricated in a facility fully qualified to MIL-PRF-38534. The standard processing adopted for the AMF28XXS meets the requirements of MIL-PRF38534 for class H but with enhanced screening steps and includes element evaluation. Applicable generic lot qualification test data including radiation performance can be made available on request. Consult Advanced Analog for special requirements. www.irf.com AMF Features n n n n n n n n n n n n n n 12 Watts Output Power Available in 3.3, 5, 12 and 15 Volt Outputs 16 - 40 VDC Input Range (28 VDC Nominal) Low Input/Output Noise Total Ionizing Dose > 25KRads (Si) 2 No SEE to LET > 60 MeV-cm /mg -55°C to +125°C Operating Range Indefinite Short Circuit Protection Flexible Mounting High Power Density Fully Isolated - Input to Output and to Case Complimentary EMI Filter Available Synchronizable From An External Source Electrical Performance Similar to AHF28XXS Series 1 07/25/03 AMF28XXS Series Specifications Absolute Maximum Ratings Input Voltage Range Soldering Temperature Storage Case Temperature -0.5V to +50VDC 300°C for 10 seconds 65°C to +135°C Recommended Operating Ratings Input Voltage Range Output Power Operating Case Temperature +16V to +40VDC Less than or equal to 12W -55°C to +125°C Static Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Group A Subgroups Parameter Test Conditions Input Voltage Output Voltage Output Current Output Power 1 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S 1 1 1 1 1 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S 2, 3 2, 3 2, 3 2, 3 2, 3 1 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 AMF2803R3S All Others 1, 2, 3 1, 2, 3 Output Ripple Voltage 2 1, 2, 3 Output Voltage Regulation Line Line AMF2803R3S AMF2805S AMF2807R5SSS AMF2812S AMF2815S Load All 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 Vin = 28 Volts, 0% load Vin = 16, 28, 40 Volts Min Nom Max Unit 16 28 40 V 3.25 4.95 6.97 11.88 14.85 3.30 5.00 7.50 12.00 15.00 3.35 5.05 7.58 12.12 15.15 V V V V V 3.20 4.90 7.35 11.76 14.70 3.40 5.10 7.65 12.24 15.30 V V V V V 0 0 0 0 0 3000 2400 1600 1000 800 mA mA mA mA mA 10 12 W W 25 60 mVPP 10 10 10 10 10 25 25 50 50 50 mV mV mV mV mV 10 50 mV Vin = 16, 28, and 40 V dc Vin = 16, 28, 40 Volts, BW = 20 Hz to 2 MHz Vin = 16, 28, 40 Volts Iout = 0%, 50%, and 100% max For Notes to Specifications, refer to page 5 2 www.irf.com AMF28XXS Series Static Characteristics (Continued) -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Group A Subgroups Parameter Input Current No Load 1, 2, 3 Inhibit 1, 2, 3 Input Ripple Current Efficiency 1, 2, 3 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S 1, 3 1, 3 1, 3 1, 3 1, 3 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S 2 2 2 2 2 Isolation Test Conditions Min Vin=28V, Iout=0, Inhibit (pin 1)=open Inhibit (pin 1) shorted to input return (pin 7) Vin = 16, 28, 40 Volts, 100% load, BW = 20 Hz to 2 MHz 100% load 1 Input to output or any pin to case (except pin 6) at 500Vdc 4 4 4 4 4 No effect on dc performance Nom Max Unit 20 30 mA 8 12 mA 20 50 mAPP 72 76 77 78 78 % % % % % 70 72 73 75 75 % % % % % 100 MΩ Capacitive Load 3, 4 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S Short Circuit Power Dissipation 1, 2, 3 500 500 300 200 200 µF µF µF µF µF 6 watts 20 ms 600 KHz Short Circuit Recovery 4 Switching Frequency 4, 5, 6 0% load to 100% Load 4, 5, 6 100% load 500 MIL-HDBK-217F SF @ Tc = 35°C 750 MTBF Weight 550 Khrs 36 g For Notes to Specifications, refer to page 5 www.irf.com 3 AMF28XXS Series Dynamic Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Group A Parameter Subgroups Synchronization Input Frequency Range Pulse Amplitude, Hi 4 Pulse Amplitude, Lo 4 Pulse Rise time 4 Pulse Duty Cycle 4 Output Response To Step Transient Load Changes 5 Test Conditions 4, 5, 6 Min Max Unit 20 700 10 0.8 100 80 KHz V V ns % 500 2.5 -0.5 Nom All 4, 5, 6 Load step 50%ó100% -300 +300 mV pk AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 Load step 0% ó50% -400 -500 -750 -750 -750 +400 +500 +750 +750 +750 mV pk mV pk mV pk mV pk mV pk Recovery Time, Step Transient Load Changes 5, 6 AMF2803R3S AMF2805S AMF2807R5S AMF2812S AMF2815S 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 Load step 50%ó100% 70 70 100 100 100 µS µs µs µs µs All 4, 5, 6 Load step 0% ó 50% 2 mS +500 +500 +1200 +1500 +1500 mV pk mV pk mV pk mV pk mV pk Output Response Transient Step Line Changes 4, 7 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S Recovery Time Transient Step Line Changes 4, 7 Turn On Overshoot 8 AMF2803R3S AMF2805S AMF2807R5SS AMF2812S AMF2815S Turn On Delay 8 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 Input step 16 ⇔ 40Vdc 100% Load -500 -500 -1200 -1500 -1500 4, 5, 6 Input step 16 ⇔ 40Vdc, 100% load 800 µs 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 0% load to 100% load 400 600 600 600 750 mV pk mV pk mV pk mV pk mV pk 4, 5, 6 0% load to 100% load 20 ms For Notes to Specifications, refer to page 5 4 www.irf.com AMF28XXS Series Notes to Specifications 1 Parameter guaranteed by line and load regulation tests. 2 Bandwidth guaranteed by design. Tested for 20 Hz to 2 MHz. 3 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 will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn on. 4 Parameter shall be tested as part of design characterization and after design or process changes. Therefore this Parameters shall be guaranteed to the limit specified. 5 Load step transition time between 2 and 10 microseconds. 6 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 % of VOUT at 50 percent load. 7 Input step transition time between 1 and 10 microseconds. Parameter guaranteed by design but not 100% tested. 8 Turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin while power is applied to the input. AMF28XXS Block Diagram EMI Filter 8 +Input 3 U nder-V oltage D etector 1 E nable 4 P rim ary H ousekeeping S upply +V out R eturn 6 C ase 2 S ync D rive P ulse W idth FB M odulator CS E rror Amp & R ef Input R eturn 7 Application Information Inhibit Function Device Synchronization Connecting the enable input (Pin 1) to input common (Pin 7) will cause the converter to shut down. It is recommended that the enable pin be driven by an open collector device capable of sinking at least 400 µA of current. The open circuit voltage of the enable input is 10.0 +1 VDC. When multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to a small difference in the switching frequency of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10 KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communication, radar or telemetry). Advanced Analog provides synchronization of multiple AMF type converters to match switching frequency of the converter to the frequency of the system clock, thus eliminating this type of noise. EMI Filter An optional EMI filter is available (AFH461) that will reduce the input ripple current to levels below the limits imposed by MIL-STD-461 CE03. www.irf.com 5 AMF28XXS Series Standard Process Screening for AMF28XXS Series Requirement MIL-STD-883 Method Engineering Model (/EM) CH+ Limits (No-Suffix) Temperature Range -55°C to +125°C -55°C to +125°C Element Evaluation MIL-PRF-38534 Ý ü Internal Visual 2017 Temperature Cycle 1010 Condition C Constant Acceleration 2001 Condition A, (3000g) PIND 2020 Condition A Burn-in, Tcase = +125°C 1015 160 hrs Interim Electrical + 25°C 48 hrs 160 hrs -55°C, +25°C, +125°C Read & Record Data -55°C, +25°C, +125°C Read & Record Data 2% Yes Burn-in, Tcase = +125°C MIL-PRF-38534 & Specification Final Electrical (Group A) PDA (25C, interim to final) Radiographic Inspection 2012 Fine & Gross 1014 External Visual 2009 Condition A, C Ý Yes Ý Per IR internal standards Radiation Specification Parameter Condition Min Typ Max Unit KRads (Si) Total Ionizing Dose MIL-STD-883, Method 1019.4 Operating bias applied during exposure 25 Heavy Ion (Single event effects) BNL Dual Van de Graf Generator 60 6 2 MeV •cm /mg www.irf.com AMF28XXS Series AMF28XXS Case Outline 1.130 Ø 0.140 0.17 5 3 4 6 7 0.03D x 0.25L 8 P ins 1.850 1.600 2.10 1.000 2 0.800 0.600 1 8 0.400 0.19 0.33 1.380 Tolerance unless otherwise specified: x.xx ±0.010 x.xxx ±0.005 Pin Designation Pin No. Designation 1 Enable 2 Sync Input 3 Positive Output 4 Output Common 5 N/C 6 Case Ground 7 Input Return 8 Positive Input Part Numbering AMF 28 05 S / EM Model Input Voltage 28 = 28V Output Voltage 03R3 = 3.3V, 05 = 5V, 12 = 12V, 15 = 15V Screening Blank = Flight Model (CH+) /EM = Engineering Model Outputs S = Single D = Dual WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 ADVANCED ANALOG: 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. 07/03 www.irf.com 7