PD - 94688 AMF28XXD SERIES 28V Input, Dual Output ADVANCED ANALOG RADIATION TOLERANT DC/DC CONVERTERS Description The AMF28XXD 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 ART2815T converter series. 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 AMF28XXD series. The physical configuration of the AMF28XXD series permits mounting directly to a heat conduction 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 AMF28XXD 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 AMF28XXD 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 ±5, ±12 and ±15 Volt Outputs 16 - 40 VDC Input Range (28 VDC Nominal) Low Input/Output Noise Total Ionizing Dose > 30KRads (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 Externally Synchronizable Electrical Performance Similar to AHF28XXD Series 1 07/25/03 AMF28XXD Series Specifications Absolute Maximum Ratings Input Voltage Range -0.5V to +50VDC Soldering Temperature 300°C for 10 seconds Storage Case Temperature 65°C to +135°C Recommmended Operating Conditions Input Voltage Range +16V to +40VDC Output Power Less than or equal to 12W Operating Case Temperature -55°C to +125°C Static Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Parameter Group A Subgroups Test Conditions Input Voltage Output Voltage AMF2805D AMF2812D AMF2815D 1 1 1 AMF2805D AMF2812D AMF2815D 2, 3 2, 3 2, 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 Output Ripple Voltage 1, 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 Output Current 1, 2 Output Power 1, 2 Output voltage Regulation 3 Line AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 Load AMF2805D AMF2805D AMF2805D 1, 2, 3 1, 2, 3 1, 2, 3 Vin = 28 Volts, 10% load on both outputs Vin = 16, 28, 40 Volts each output each output each output Min Nom Max Unit 16 28 40 V ±4.95 ±5.00 ±5.05 ±11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15 V V V ±4.90 ±11.76 ±14.70 ±5.10 ±12.24 ±15.30 V V V 240 100 80 2160 900 720 mA mA mA 12 12 12 W W W 25 25 25 60 60 60 mVPP mVPP mVPP ±10 ±10 ±10 ±25 ±50 ±50 mV mV mV ±10 ±10 ±10 ±50 ±50 ±50 mV mV mV Vin = 28 Volts, 100% load Vin = 16, 28, 40 Volts, 100% load, BW = 20 Hz to 2 MHz Vin = 16, 28, 40 Volts Iout = 10, 50%, and 100% load For Notes to Specifications, refer to page 5 2 www.irf.com AMF28XXD Series Static Characteristics (Continued) -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Parameter Cross Regulation Group A Subgroups 5 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 Input Ripple Current 3 AMF2805D AMF2812D AMF2815D 1, 2, 3 1, 2, 3 1, 2, 3 Input Current No Load Inhibit Efficiency3 Min Nom Max Unit 10 3 3 % % % 35 35 35 60 60 60 mA mA mA 8 8 8 12 12 12 mA mA mA 20 20 20 50 50 50 mAPP mAPP mAPP Minimum 1.0 watt on both outputs 10%-90% load 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 AMF2805D AMF2812D AMF2815D 1, 3 1, 3 1, 3 76 77 78 % % % AMF2805D AMF2812D AMF2815D 2 2 2 72 74 74 % % % 100 MΩ Isolation Capacitive Load Test Conditions 5, 6 1 Input to output or any pin to case (except pin 6) at 500Vdc 4 No effect on dc performance, total for both outputs AMF2805D AMF2812D AMF2815D Short Circuit Power Dissipation 1, 2, 3 MTBF Weight MIL-HDBK-217F, SF @ Tc=35°C 500 200 200 µF µF µF 6 watts 750 Khrs 36 g For Notes to Specifications, refer to page 5 www.irf.com 3 AMF28XXD Series Dynamic Characteristics -55°C ≤ TCASE ≤ +125°C, VIN=28 VDC ±5%, CL=0, unless otherwise specified. Group A Subgroups Parameter Short Circuit Recovery 6 AMF2805D AMF2812D AMF2815D Switching Frequency 3 4, 5, 6 Synchronization Input 3 Frequency Range Pulse Amplitude, Hi 6 Pulse Amplitude, Lo 6 Pulse Rise time 6 Pulse Duty Cycle 6 Output Response To Step Transient Load Changes 3, 7 Recovery Time, Step Transient Load Changes 3, 7, 8 Output Response Transient Step Line Changes 3, 6, 9 AMF2805D AMF2812D AMF2815D Recovery Time Transient Step Line Changes 3, 6, 9 Turn On Overshoot 3, 10 Turn On Delay 3, 10 4, 5, 6 4, 5, 6 4, 5, 6 Test Conditions Min Nom Max Unit 25 25 25 ms ms ms 600 KHz 20 700 10 0.8 100 80 KHz V V ns % 0% load to 100% Load 100% load 4, 5, 6 500 500 2.5 -0.5 550 4, 5, 6 Load step 50%ó100% -200 +200 mV pk 4, 5, 6 Load step 10% ó 50% --800 +800 mV pk 4, 5, 6 Load step 50%ó100% 70 µs 4, 5, 6 Load step 10% ó50% 2000 µs +450 +750 +750 mV pk mV pk mV pk 1200 µs Input step 16ó 40Vdc, 100% Load -450 -750 -750 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 Input step 16 ó 40Vdc, 100% load All 4, 5, 6 0% load 600 mV pk AMF2805D AMF2812D AMF2815D 4, 5, 6 4, 5, 6 4, 5, 6 100% load 400 300 300 mV pk mV pk mV pk 4, 5, 6 0% load to 100% load 25 ms For Notes to Specifications, refer to page 5 4 www.irf.com AMF28XXD Series Notes to Specifications 1. 2. 3. 4. 5. Applicable to positive and negative outputs. Maximum combined output is 12 watts. 10.8 watts (max.) is available from either output (90%). Load current split equally between +VOUT and VOUT. 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output. Capacitive value 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. 6. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the limit specified. 7. Load step transition time between 2 and 10 microseconds. 8. Recovery time is measured from initiation of the transient to where Vout has returned to within ±1% of Vout at 50% load. 9. Input step transient time between 1 and 10 microseconds. 10. 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. AMF28XXD Block Diagram 8 + In put 3 EMI F ilter 4 1 E nable P rim a ry H ouseke eping S upply 5 + V out R etu rn -V ou t 6 C ase 2 S ync D rive P uls e W idth FB M odulato r E rror Amp & R ef CS In put R etu rn 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. If the user chooses not to use the inhibit function, it may be left open and the converter will function normally. Because it is internally pulled up, the open circuit voltage of the inhibit input is 10.0 +1VDC. 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 AMF28XXD Series Standard Process Screening for AMF28XXD Series Requirement MIL-STD-883 Method CH+ Limits Temperature Range -55°C to +125°C Element Evaluation MIL-PRF-38534 Internal Visual 2017 Yes Temperature Cycle 1010 Condition C Constant Acceleration 2001 Condition A, (3000g) PIND 2020 Condition A Burn-in Interim Electrical; @160 hrs 1015 320 hrs @ +125°C (2 x 160 hrs) Final Electrical (Group A) Read & Record Data MIL-PRF-38534 & Specification -55°C, +25°C, +125°C PDA (25C, interim to final) 2% Radiographic Inspection 2012 Yes Fine & Gross 1014 Condition A, C External Visual 2009 Yes Radiation Specification Parameter Condition Min Typ Max Unit KRads (Si) Total Ionizing Dose MIL-STD-883, Method 1019.4 Operating bias applied during exposure 30 Heavy Ion (Single event effects) BNL Dual Van de Graf Generator 60 6 2 MeV •cm /mg www.irf.com AMF28XXD Series AMF28XXD 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 Part Numbering Pin Designation Pin No. AMF 28 05 D / EM Designation 1 Enable 2 Sync Input 3 Positive Output 4 Output Return 5 Negative Output 6 Case Ground 7 Input Return 8 Positive Input Model Input Voltage 28 = 28V Output Voltage 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