PD-94555B AHE28XXD SERIES 28V Input, Dual Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER 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 ±5V, ±12V and ±15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated push-pull 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 fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet. Variations in electrical, mechanical and screening can be accommodated. Contact IR Santa Clara for special requirements. www.irf.com AHE Features n n n n n n n n n n n n n n n 17V to 40VDC Input Range 28VDC Nominal Input ± 5V, ±12V and ±15V Outputs Available Indefinite Short Circuit and Overload Protection 3 12.9W/in Power Density 15W Output Power Fast Loop Response for Superior Transient Characteristics Operating Temperature Range from -55°C to +125°C Available Popular Industry Standard Pin-Out Resistance Seam Welded Case for Superior Long Term Hermeticity Efficiencies up to 82% Shutdown from External Signal Military Screening 314,000 hour MTBF at 85°C (AUC) Standard Microcircuit Drawings Available 1 01/08/07 AHE28XXD Series Specifications AHE2805D Absolute Maximum Ratings Input voltage -0.5V to +50VDC Soldering temperature 300°C for 10 seconds Operating case temperature -55°C to +125°C Storage case temperature -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 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 Input current IIN Input ripple current 8 IRIP PD 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 FS Short circuit, TC = +25°C IOUT = ±625mA VOTLOAD 50% load to/from100%load Efficiency EFF Isolation ISO Capacitive load 6, 12 CL Power dissipation load fault Switching frequency 9 Output response to step 7 transient load changes No load to/from 50% load Group A Subgroups Device Types Limits 1 2,3 1,2,3 All All 1,2,3 All 1,2,3 1 2,3 1,2,3 All All All 25 50 110 1,2,3 All 18 Min ±4.95 ±4.90 0.0 Unit Max ±5.05 ±5.10 ±625 mA 60 mVp-p 15 V W mV mV mA 40 1,2,3 All 1 All 80 % 1 All 100 MΩ 4 All 200 µF 1 All 6.0 W 1 4,5,6 4 5,6 4 5,6 50 01 02 03 All 225 225 250 -300 6.0 275 245 275 +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 AHE2805D Group A Subgroups Device Types Limits 4 All Max 70 5,6 4,5,6 4,5,6 4,5,6 All All All 100 1500 5.0 1200 ms mVpk 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 4.0 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 4.0 600 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 Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±0.1 % of V OUT at 50 % 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 16V dc input, derate output power by 33 %. 5 Input step transition time between 2.0µs and 10µs. 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 2.0µs and 10µs. 8 Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 9 Tested at each output. 10 When operating with unbalanced loads, at least 25 % 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 I. www.irf.com 3 AHE28XXD Series Specifications AHE2812D Absolute Maximum Ratings Input voltage -0.5V to +50VDC Soldering temperature 300°C for 10 seconds Operating case temperature -55°C to +125°C Storage case temperature -65°C to +135°C Table II. Electrical Performance Characteristics Test Output voltage Output current 9, 11 Output ripple voltage Output power 9 Line 10 Regulation Load 9 Regulation 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 Input current IIN Input ripple current 8 IRIP PD 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 FS Short circuit, TC = +25°C IOUT = ±625mA VOTLOAD 50% load to/from100%load Efficiency EFF Isolation ISO Capacitive load 6, 12 CL Power dissipation load fault Switching frequency 9 Output response to step 7 transient load changes No load to/from 50% load 4 Group A Subgroups Device Types 1 2,3 1,2,3 All All 1,2,3 All 1,2,3 1 2,3 1,2,3 All All 1,2,3 Limits Min ±11.88 ±11.70 0.0 Unit Max ±12.12 ±12.24 ±625 mA 60 mVp-p 15 V W mV All 30 60 120 mV All 18 mA 40 1,2,3 All 1 All 80 % 1 All 100 MΩ 4 All 200 µF 1 All 6.0 W 1 4,5,6 4 5,6 4 5,6 50 01 02 03 All 225 225 250 -300 6.0 275 245 275 +300 All -450 -500 -750 +450 +500 +750 mAp-p KHz mVpk www.irf.com AHE28XXD Series Table II. 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 Limits 4 All Max 70 5,6 4,5,6 4,5,6 4,5,6 All All All 100 1500 5.0 1200 ms mVpk 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 4.0 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 4.0 600 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 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±0.1% of V OUT at 50 % 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 16V dc input, derate output power by 33 %. 5 Input step transition time between 2.0µs and 10µs. 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 2.0µs and 10µs. 8 Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 9 Tested at each output. 10 When operating with unbalanced loads, at least 25 % 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 Specifications AHE2815D Absolute Maximum Ratings Input voltage -0.5V to +50VDC Soldering temperature 300°C for 10 seconds Operating case temperature -55°C to +125°C Storage case temperature -65°C to +135°C Table III. Electrical Performance Characteristics Test Output voltage Output current 9, 11 Output ripple voltage 8, 9 4, 9, 11 Output power Line 9, 10 Regulation Load 9 Regulation 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 VRLOAD Input current IIN Input ripple current 8 IRIP 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 VOTLOAD 50% load to/from100%load Efficiency EFF Isolation ISO Capacitive load 6, 12 Power dissipation load fault 9 Switching frequency Output response to step transient load 7 changes CL No load to/from 50% load Refer Notes to Specifications, refer to page 5 6 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 6.0 W 4,5,6 01 02 03 All 225 225 250 -300 275 245 275 +300 KHz -450 -500 -750 +450 +500 +750 mVpk All 4 5,6 4 5,6 50 mAp-p www.irf.com AHE28XXD Series Table III. 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 5.0 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 4.0 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 4.0 600 mV pk TonD IOUT = 0 and ±500mA 4,5,6 All 10 ms 4,5,6 All 10 ms Limits Min Recovery time step transient 1, 7 load changes Load fault 12 recovery TrLF Unit Notes to Specifications 1 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±0.1 % of VOUT at 50 % 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 16Vdc input, derate output power by 33 %. 5 Input step transition time between 2.0µs and 10µs. 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 2.0µs and 10µs. 8 Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz. 9 Tested at each output. 10 When operating with unbalanced loads, at least 25 % 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 III. www.irf.com 7 AHE28XXD Series Block Diagram 3 +Vout +Input 1 EMI Filter 4 Output Return Inhibit Input Regulator 2 Sync 5 -Vout Drive 1 Pulse Width Modulator FB 9 Error Amp & Reference Drive 2 Input Return 10 Application Information International Rectifier 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 ± 1.0VDC. 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 Return AFC461 or AFV461 Output + In Case Return Output AHE28xxS Return Return MSTR System Bus + In AHE28xxS Output or Other Return Compatable Return Case SLV Output + In Case AHE28xxS Return Return SLV 8 www.irf.com AHE28XXD Series Mechanical Outlines Flanged Ø 0.162 2 Holes Non-Flanged 0.050 0.800 6 10 8 7 4 5 4 X 0.400 =1.600 3 2.110 Max 2 2.560 1 2.880 Max 9 0.040 D X 0.26 L Pins 2.110 0.495 1.110 0.495 Max Pin Designation Pin # Designation 1 + Input 2 Inhibit Input 3 + Output 4 Output Return 5 - Output 6 NC 7 NC 8 Case Ground 9 NC or Sync. 10 Input Return Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 5962-92040 5962-91575 www.irf.com Vendor Cage Code 52467 52467 IR Standard Part Number AHE2812D AHE2815D 9 AHE28XXD Series Device Screening Requirement MIL-STD-883 Method Temperature Range No Suffix ES d -20°C to +85°C -55°C to +125°C Element Evaluation HB e -55°C to +125°C CH -55°C to +125°C MIL-PRF-38534 N/A N/A N/A Class H 2023 N/A N/A N/A N/A Internal Visual 2017 c Yes Yes Yes Temperature Cycle 1010 N/A Cond B Cond C Cond C Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs PIND 2020 N/A N/A N/A N/A 48 hrs@hi temp Non-Destructive Bond Pull Burn-In 1015 N/A Final Electrical MIL-PRF-38534 25°C ( Group A ) & Specification 25°C d 160 hrs@125°C 160 hrs@125°C -55°C, +25°C, -55°C, +25°C, +125°C +125°C PDA MIL-PRF-38534 N/A N/A N/A 10% Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C Radiographic 2012 N/A External Visual 2009 c N/A N/A N/A Yes Yes Yes Notes: Best commercial practice Sample tests at low and high temperatures -55°C to +105°C for AHE, ATO, ATW Part Numbering AHE 28 15 D F /CH - MSTR Model Input Voltage Nominal 28 = 28V Output Voltage 05 = ±5V 12 = ±12V 15 = ±15V Sync Option MSTR = Master SLV = Slave Omit for Standard Screening Level (Please refer to Screening Table) No Suffix, ES, HB, CH Package Option F = Flange Blank = Non-Flanged Output D = Dual 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. 01/2007 10 www.irf.com