PD - 94555 AHE28XXD SERIES 28V Input, Dual Output ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS Description The AHE Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to MIL-STD-704D input requirements, these devices have nominal 28VDC inputs with +12V and +15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated pushpull topology operating in the feed-forward mode at a nominal switching frequency of 250KHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits. The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical feedback circuits. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MILPRF-38534 for class H. The HB grade is processed and screened to the class H requirement, but may not be necessarily meet all of the other MIL-PRF-38534 requirements, e.g., element evaluation and Periodic Inspection (P.I.) are not required. Both grades are tested to meet the complete group “A” test specification over the full military temperature range without output power deration. Two grades with more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements. www.irf.com AHE Features n 17 to 40 VDC Input Range n 28 VDC Nominal Input n ±12V and ±15V Outputs Available n Indefinite Short Circuit and Overload Protection 3 n 12.9 W/in Power Density n 15 Watts Output Power n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from -55°C to +125°C Available n Popular Industry Standard Pin-Out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Efficiencies up to 82% n Shutdown from External Signal n Military Screening n 314,000 hour MTBF at 85°C (AUC) 1 10/25/02 AHE28XXD Series Specifications AHE2812D n ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table I. Electrical Performance Characteristics Test Output voltage Output current 9, 11 Output ripple voltage Output power 9 Line 10 Regulation Load 9 Regulation Input current 8, 9 4, 9, 11 Symbol Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified VOUT IOUT = 0 IOUT VIN = 17, 28, and 40 V dc VRIP VIN = 17, 28, and 40 V dc, B.W. = DC to 2MHz VIN =17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, ±313, and ±625mA VIN = 17, 28, and 40 V dc, IOUT = 0, ±313,and ±625 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = ±625mA B.W. = DC to 2MHz POUT VRLINE VRLOAD IIN Input ripple current 8 IRIP Output response to step 7 transient load changes 1,2,3 All 1,2,3 1 2,3 1,2,3 All All 1,2,3 Max ±12.12 ±12.24 ±625 mA 60 mVp-p 15 V W mV All 30 60 120 mV All 18 mA 40 All 80 % 1 All 100 MΩ 4 All 200 µF PD 1 All 6 W FS Short circuit, TC = +25°C IOUT = ±625mA 1 4,5,6 VOTLOAD 50% load to/from100%load CL 9 All Min ±11.88 ±11.76 0.0 1 ISO Switching frequency All Unit IOUT = ±625mA TC = +25°C Input to output or any pin to case (except pin 8) at 500V dc Tc = +25ºC No effect on dc performance, Tc = +25ºC 3 Overload, TC = +25°C Isolation Power dissipation load fault 1 2,3 1,2,3 Limits All EFF 6, 12 Device Types 1,2,3 Efficiency Capacitive load Group A Subgroups No load to/from 50% load 4 5,6 4 5,6 50 01 02 03 All 225 225 250 -300 6 275 245 275 +300 All -450 -500 -750 +450 +500 +750 mAp-p kHz mVpk For Notes to Specifications, refer to page 3 2 www.irf.com AHE28XXD Series Table I. Electrical Performance Characteristics - continued Test Symbol Conditions -55° ≤Tc ≤+125°C Vin = 28 Vdc ±5%, CL= 0 unless otherwise specified TTLOAD 50% load to/from 100% load AHE2812D Group A Subgroups Device Types 4 All Max 70 5,6 4,5,6 4,5,6 4,5,6 All All All 100 1500 5 1200 ms mVpk Limits Min Recovery time step transient load 1, 7 changes Unit µs Output response transient step line 5, 12 changes VOTLINE No load to 50% load 50% load to no load Input step 17 to 40V dc Recovery time transient step 1, 5, 12 line changes TTLINE Input step 40 to 17V dc Input step 17 to 40V dc 4,5,6 4,5,6 All All -1500 4 ms VTonOS TonD Input step 40 to 17V dc IOUT = 0 and ±625mA IOUT = 0 and ±625mA 4,5,6 4,5,6 4,5,6 All All All 4 600 10 mVpk ms 4,5,6 All 10 ms Turn on overshoot 2, 9 Turn on delay 9 Load fault recovery 12 TrLF Notes to Specifications 1 2 3 4 5 6 7 8 9 10 11 12 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±.1 percent of VOUT at 50 percent load. 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 (pin 2) while power is applied to the input. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. Total power at both outputs. For operation at 16 V dc input, derate output power by 33 percent. Input step transition time between 2 and 10 microseconds. 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. Load step transition time between 2 and 10 microseconds. Bandwidth guaranteed by design. Tested for 20 KHz to 2MHz. Tested at each output. When operating with unbalanced loads, at least 25 percent of the load must be on the positive output to maintain regulation. Parameter guaranteed by line and load regulation tests. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified in Table I. www.irf.com 3 AHE28XXD Series Specifications AHE2815D n ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table II. Electrical Performance Characteristics Test Output voltage Output current 9, 11 Output ripple voltage 8, 9 4, 9, 11 Symbol Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified VOUT IOUT = 0 IOUT VIN = 17, 28, and 40 V dc VRIP VIN = 17, 28, and 40 V dc, B.W. = dc to 2 mHz VIN =17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, ±250, and ±500mA VIN = 17, 28, and 40 V dc, IOUT = 0, ±250,and ±625 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = ±500mA B.W. = DC to 2MHz POUT VRLINE Output power Line 9, 10 Regulation Load 9 Regulation Input current VRLOAD IIN Input ripple current 8 IRIP Power dissipation load fault 9 Switching frequency PD IOUT = ±500mA TC = +25°C Input to output or any pin to case (except pin 8) at 500V dc Tc = +25°C No effect on dc performance, Tc = +25°C 3 Overload, TC = +25°C FS IOUT = ±500mA Output response to step transient load 7 changes VOTLOAD 50% load to/from100%load Efficiency EFF Isolation ISO Capacitive load 6, 12 CL No load to/from 50% load Group A Subgroups Device Types 1 2,3 1,2,3 All 1,2,3 All 1,2,3 1 2,3 1,2,3 All All 1,2,3 All Limits Min ±14.85 ±14.70 0.0 Unit Max ±15.15 ±15.30 ±500 mA 60 mVp-p 15 V W mV All 35 75 150 mV All 18 mA 40 1,2,3 All 1 All 80 % 1 All 100 MΩ 4 All 200 µF 1 All 6 W 4,5,6 01 02 03 All 225 225 250 -300 275 245 275 +300 kHz All -450 -500 -750 +450 +500 +750 4 5,6 4 5,6 50 mAp-p mV pk Refer Notes to Specifications, refer to page 5 4 www.irf.com AHE28XXD Series Table II. Electrical Performance Characteristics - continued Test Symbol AHE2815D Conditions -55°C ≤Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Group A Subgroups Device Types TTLOAD 50% load to/from 100% load 4 All Max 70 µs Output response transient step 5, 12 line changes VOTLINE No load to 50% load 50% load to no load Input step 17 to 40V dc 5,6 4,5,6 4,5,6 4,5,6 All All All 100 1500 5 1500 ms mV pk Recovery time transient step line 1, 5, 12 changes TTLINE Input step 40 to 17V dc Input step 17 to 40V dc 4,5,6 4,5,6 All All -1500 4 ms Turn on 9 overshoot 2, 9 Turn on delay VTonOS Input step 40 to 17V dc IOUT = 0 and ±500mA 4,5,6 4,5,6 All All 4 600 mV pk TonD IOUT = 0 and ±500mA 4,5,6 All 10 ms Load fault 12 recovery TrLF 4,5,6 All 10 ms Limits Min Recovery time step transient 1, 7 load changes Unit Notes to Specifications 1 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±.1 percent of VOUT at 50 percent load. 2 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 (pin 2) while power is applied to the input. 3 An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 4 Total power at both outputs. For operation at 16 Vdc input, derate output power by 33 percent. 5 Input step transition time between 2 and 10 microseconds. 6 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. 7 Load step transition time between 2 and 10 microseconds. 8 Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. 9 Tested at each output. 10 When operating with unbalanced loads, at least 25 percent of the load must be on the positive output to maintain regulation. 11 Parameter guaranteed by line and load regulation tests. 12 Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified in Table II. www.irf.com 5 AHE28XXD Series AHE28XXD Block Diagram 3 + V ou t 1 + In put EMI F ilter 4 R eturn R egu la tor 2 E n able 5 -V out D rive 1 P u ls e W id th M odulator F B 9 S y nc E rro r A m p & R e fe re n ce D rive 2 In put R eturn 10 Application Information Advanced Analog offers an option that provides synchronization of multiple AHE/ATW converters, thus eliminating this type of noise. Inhibit Function Connecting the inhibit input (Pin 2) to input common (Pin 10) will cause the converter to shut down. It is recommended that the inhibit pin be driven by an open collector device capable of sinking at least 400µA of current. The open circuit voltage of the inhibit input is 11.5 ±1 VDC. EMI Filter An optional EMI filter (AFC461) will reduce the input ripple current to levels below the limits imposed by MIL-STD-461 CEO3. Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to slight difference in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communications, radar or telemetry). To take advantage of this capability, the system designer must assign one of the converters as the master. Then, by definition, the remaining converters become slaves and will operate at the masters’ switching frequency. The user should be aware that the synchronization system is fail-safe; that is, the slaves will continue operating should the master frequency be interrupted for any reason. The layout must be such that the synchronization output (pin 9) of the master device is connected to the synchronization input (pin 9) of each slave device. It is advisable to keep this run short to minimize the possibility of radiating the 250KHz switching frequency. The appropriate parts must be ordered to utilize this feature. After selecting the converters required for the system, a ‘MSTR’ suffix is added for the master converter part number and a ‘SLV’ suffix is added for slave part number. Typical Synchronization Connection + In R eturn A F C 461 or A F V 461 O u tput C ase R eturn O u tput + In A H E 2 8xxS R eturn R eturn M STR S y stem Bus + In A H E 2 8xxS O u tput or O the r R eturn C o m pa ta ble R eturn C ase S LV O u tput + In C ase A H E 2 8xxS R eturn R eturn S LV 6 www.irf.com AHE28XXD Series AHE28XXD Case Outlines Non-Flanged Flanged Ø 0.162 2 H oles 0.050 0.800 6 10 8 7 4 5 4 X 0.400 =1.600 3 2.110 M ax 2 2.560 1 2.880 M ax 9 0.040 D X 0.26 L P ins 2.110 0.495 0.495 M ax 1.110 Part Numbering Pin Designation ( AHE2812D & AHE2815D ) Pin No. Designation 1 Positive Input 2 Inhibit Input 3 Positive Output 4 Output Common 5 Nagative Output 6 N/C 7 N/C 8 Case Ground 9 N/C or Sync. 10 Input Common A H E 28 15 D F / C H - M S TR 28 = 2 8V O u tp u t V o lta g e 12 = 1 2, 15 = 1 5 O u tp u ts www.irf.com S yn c O p tio n M odel In p u t V o lta g e S = S ing le, D = D ual M S T R = M a ste r S L V = S la ve O m it fo r S ta n d a rd S cre e n in g – , ES, HB, CH P a ck a g e O p tio n s F = Flan ge O m it fo r S tandard 7 AHE28XXD Series Available Screening Levels and Process Variations for AHE28XXD Series Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual MIL-STD-883 Method No Suffix -20 to +85°C ES Suffix -55°C to +125°C HB Suffix -55°C to +125°C CH Suffix -55°C to +125°C MIL-PRF-38534 2017 1010 ∗ 2001 Yes Cond B Yes Cond C Yes Cond C 500g Cond A Cond A 1015 MIL-PRF38534 48hrs @ 85°C 25°C 48hrs 96hrs @ 125°C 25°C 160hrs @ 125°C -55, +25, +125°C 160hrs @ 125°C -55, +25, +125°C 1014 Cond C Cond A, C Cond A, C Cond A, C 2009 ∗ Yes Yes Yes * Per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference Standard Military drawing PIN 5962-9204001HXX 5962-9204001HZX 5962-9204002HXX 5962-9204002HZX 5962-9204003HXX 5962-9204003HZX Vendor CAGE Code 52467 52467 52467 52467 52467 52467 Vendor Similar PIN AHE2812D/CH AHE2812DF/CH AHE2812D/CH-SLV AHE2812DF/CH-SLV AHE2812D/CH-MSTR AHE2812DF/CH-MSTR Standard Military drawing PIN 5962-9157501HXX 5962-9157501HZX 5962-9157502HXX 5962-9157502HZX 5962-9157503HXX 5962-9157503HZX Vendor CAGE Code 52467 52467 52467 52467 52467 52467 Vendor Similar PIN AHE2815D/CH AHE2815DF/CH AHE2815D/CH-SLV AHE2815DF/CH-SLV AHE2815D/CH-MSTR AHE2815DF/CH-MSTR 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. 10/02 8 www.irf.com