PD-94554B AHE28XXS SERIES 28V Input, Single Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description The AHE28XXS 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 single 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. Three standard temperature grades are offered with screening options. Refer to Part Number section. They can be provided in a standard plug-in package for PC mounting or in a flanged package for more severe environments. 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. Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact IR Santa Clara with specific requirements. www.irf.com AHE Features n n n n n n n n n n n n n n 17V to 40VDC Input Range (28VDC Nominal) 5V, 12V and 15V Outputs Available Indefinite Short Circuit and Overload Protection 3 17 W/in Power Density 15W and 20W Output Power Models 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 84% Shutdown from External Signal Military Screening 325,000 hour MTBF at 85°C (AUC) Standard Microcircuit Drawings Available 1 01/08/07 AHE28XXS Series Specifications TCASE = -55°C to +85°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input Voltage Power Output 1 -0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S, 22.5W typ. for AHE2812S and AHE2815S Soldering Temperature Temperature Range Parameter 1 300°C for 10 seconds Operating Temperature -55°C to +125°C Storage Case Temperature -65°C to +135°C Conditions -55°C ≤ Tc ≤ +85°C Vin = 28 Vdc ±5%,C L = 0 Unless otherwise specified AHE2812S AHE2805S AHE2815S Min Typ Max Min Typ Max Min Typ Max Units 4.90 0.0 5.00 5.10 3000 60 11.76 0.0 12.00 15.00 30 12.24 1667 60 14.70 0.0 20 30 15.30 1333 60 VDC mADC mVp-p 5.00 5.05 11.88 20 12.00 12.12 14.85 20 15.00 15.15 VDC W ±0.5 ±0.5 ±1.0 ±1.0 ±0.5 ±0.5 ±1.0 ±1.0 ±0.5 ±0.5 ±1.0 ±1.0 % 28 8.0 40 18 35 50 28 8.0 40 18 35 50 28.0 8.0 40 18 35 50 Static Characteristic OUTPUT Voltage Current Ripple Accuracy 1 Power REGULATION Line Load INPUT 4 Voltage Range Current Ripple Current Efficiency Capacitive Load Load fault power 4 dissipation Isolation VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25°C, IOUT = 0 4.95 15 VIN = 17 to 40 VDC IOUT = to Full Load 17 Inhibited No Load Full Load TCASE = +25°C Half Load to Full Load No effect on performance 20 80 500 82 Recovery 2 Step Line Changes Output Transient 2 Recovery Turn-On Overshoot Delay3 25 79 200 83 6.0 17 25 80 200 84 6.0 VDC mADC mADC mV p-p % µF 6.0 W Input to Output @ 500Vdc 100 Dynamic Characteristic Step Load Changes Output Transient 17 100 100 MΩ 50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load ±150 -300 +300 25 500 7.0 ±200 -400 +400 25 500 7.0 ±200 -400 +400 25 500 7.0 mVpk mVpk mVpk µs µs msec Input step 17 to 40VDC Input step 40 to 17VDC Input step 17 to 40VDC Input step 40 to 17VDC VIN = 17 to 40VDC IOUT = 0 to Full load +180 -600 400 400 +180 -600 400 400 +180 -600 400 400 mVpk mVpk µs µs Load Fault 4 Recovery VIN = 17 to 40VDC 0 8.0 8.0 Weight Standard Package Flange Package 55 58 500 14 14 300 8.0 8.0 55 58 600 14 14 300 8.0 8.0 500 14 14 mVpk ms ms 55 58 g Notes to Specifications 1. Above +85°C case temperature, derate output power linearly to 0 and maximum input voltage linearly to 42V at 115°C case. 2. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of VOUT at 50% load. See typical waveforms. 3. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. 4. For operation at 16VDC, derate output power by 33%. 2 www.irf.com AHE28XXS Series Specifications TCASE = -55°C to +105°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input Voltage Power Output 5 -0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S/ES, 22.5W typ. for AHE2812S/ES and AHE2815S/ES Soldering Temperature 300°C for 10 seconds Temperature Range Parameter 1 Operating Temperature -55°C to +125°C Storage Case Temperature -65°C to +135°C Conditions -55°C ≤ Tc ≤ +105°C Vin = 28 Vdc ±5%,CL = 0 Unless otherwise specified AHE2812S/ES AHE2805S/ES AHE2815S/ES Min Typ Max Min Typ Max Min Typ Max Units 4.90 0.0 5.00 11.76 0.0 12.00 30 12.24 1667 60 14.70 0.0 15.00 20 5.10 3000 60 30 15.30 1333 60 VDC mADC mVp-p 4.95 15 5.00 5.05 11.88 20 12.00 12.12 14.85 20 15.00 15.15 VDC W ±0.5 ±0.5 ±1.0 ±1.0 ±0.5 ±0.5 ±1.0 ±1.0 ±0.5 ±0.5 ±1.0 ±1.0 % 28 8.0 40 18 35 50 28 8.0 40 18 35 50 28 8.0 40 18 35 50 Static Characteristic OUTPUT Voltage Current Ripple Accuracy Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Efficiency Capacitive Load Load fault power dissipation4 Isolation VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25°C, IOUT = 0 VIN = 17 to 40 VDC IOUT = 0 to Full Load Inhibited No Load Full Load TCASE = +25°C Half load to Full load No effect on performance 17 20 78 500 82 Recovery2 25 79 200 83 6.0 17 25 80 200 84 6.0 VDC mADC mADC mV p-p % µF 6.0 W Input to Output @ 500Vdc 100 Dynamic Characteristic Step Load Changes Output Transient 17 100 100 MΩ 50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load ±150 -300 +300 25 500 7.0 ±200 -400 +400 25 500 7.0 ±200 -400 +400 25 500 7.0 mVpk mVpk mVpk µs µs ms Input step 17 to Input step 40 to Input step 17 to Input step 40 to +180 -600 400 400 +180 -600 400 400 +180 -600 400 400 mVpk mVpk µs µs Step Line Changes Output Transient Recovery2 TURN –ON Overshoot Delay3 40VDC 17VDC 40VDC 17VDC VIN = 17 to 40VDC IOUT = 0 to Full Load 0 8.0 500 14 300 8.0 600 14 300 8.0 750 14 mVpk ms Load Fault Recovery4 VIN = 17 to 40VDC 8.0 14 8.0 14 8.0 14 ms Weight Standard Package Flange Package 60 65 60 65 60 65 g Notes to Specifications 1. 2. 3. 4. 5. Above +105°C case temperature, derate output power linearly to 0 at 125°C case. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of V OUT at 50% load. See typical waveforms. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. For operation at 16VDC, derate output power by 33%. Above +85°C case temperature, derate maximum input voltage linearly to 33V at +125°C case. www.irf.com 3 AHE28XXS Series Specifications TCASE = -55°C to +105°C, VIN = +28V ± 5% unless otherwise specified Absolute Maximum Ratings Input Voltage Power Output 1 -0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S/HB & CH, 22.5W typ. for AHE281XS/HB & CH Soldering Temperature 300°C for 10 seconds Temperature Range Parameter 1 Operating Temperature -55°C to +125°C Storage Case Temperature -65°C to +135°C Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%,CL = 0 Unless otherwise specified AHE2805S/HB&CH AHE2812S/HB&CH AHE2815S/HB&CH Min Typ Max Min Typ Max Min Typ Max Units 4.90 0.0 5.00 5.10 3000 60 11.76 0.0 12.00 30 12.24 1667 60 14.70 0.0 15.00 20 30 15.30 1333 60 VDC mADC mVp-p 4.95 15 5.00 5.05 11.88 20 12.00 12.12 14.85 20 15.00 15.15 VDC W Static Characteristic OUTPUT Voltage Current Ripple Accuracy Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Efficiency Capacitive Load Load fault power dissipation5 Isolation Dynamic Characteristic Step Load Changes Output TC =25°C Transient Recovery2 Step Line Changes Output TC = 25°C Transient Recovery2 TURN –ON Overshoot Delay3 Load Fault Recovery4 Weight VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25°C, IOUT = 0 VIN = 17 to 40 VDC TCASE = 25°C IOUT = 0 to Full Load 5.0 17 Inhibited No Load Full Load TCASE = +25°C No effect on performance Short Circuit TC =25°C Overload TC = 25°C Input to Output @ 500Vdc 30 35 mV 10 80 500 28 8.0 20 82 1000 50 50 40 18 35 50 17 80 200 28 8.0 25 83 1000 4.5 6.0 100 120 50 40 18 35 50 17 80 200 150 28 8.0 25 84 1000 4.5 6.0 100 40 18 35 50 4.5 6.0 100 VDC mADC mADC mV p-p % µF W MΩ 50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load ±150 -300 +300 25 100 ±300 -500 +500 70 200 5.0 ±200 -400 +400 25 500 ±300 -500 +500 70 1500 5.0 ±200 -400 +400 25 500 ±300 -500 +500 70 1500 5.0 mVpk mVpk mVpk µs µs ms Input step 17 to 40VDC Input step 40 to 17VDC Input step 17 to 40VDC Input step 40 to 17VDC +180 -600 400 400 +300 1000 800 800 +180 -600 400 400 +500 -1500 800 800 +180 -600 400 400 +500 -1500 800 800 mVpk mVpk µs µs 0 8.0 8.0 55 58 550 10 10 300 8.0 8.0 55 58 600 10 10 300 8.0 8.0 500 10 10 55 58 mVpk ms ms g VIN = 17 to 40VDC IOUT = 0 to Full Load VIN = 17 to 40VDC Standard Package Flange Package Notes to Specifications 1. 2. Above +125°C case temperature, derate output power linearly to 0 at 135°C case. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of V OUT at 50% load. See typical waveforms. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. For operation at 16VDC, derate output power by 33%. 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. 3. 4. 5. 4 www.irf.com AHE28XXS Series Block Diagram 5 +Vout +Input 1 EMI Filter Inhibit Input 2 Sync 4 Output Return Drive 1 Pulse Width Modulator FB 9 Error Amp & Ref Drive 2 3 VADJ Input Return 10 Application Information Device Synchronization Inhibit Function 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). Intenational Rectifier offers an option, which provides synchronization of multiple AHE/ATW/ATO type converters, thus eliminating this type of noise. 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 EMI filter (AFC461), available as an option, will reduce the input ripple current to levels below the limits imposed by MIL-STD-461B CEO. Output Voltage Adjustment (AHE2805 only) Typical Synchronization Connection The output voltage of the AHE2805S converter can be adjusted upward by connecting an appropriate resistor between Output Adjust (Pin 3) and Output Common (Pin 4) as shown in Table 1 below. + In Return AFC461 or AFV461 Output + In Case Return Return AHE28xxS - MSTR Output Return MSTR Table 1 Output adjustment resistor values : Resistance Pin 3 to 4 ( ) None 390K 145K 63K 22K 0 Output Voltage Increases (%) 0 +1% +2% +3% +4% +5% + In Case System Bus Return AHE28xxD -SLV +Output Return -Output SLV + In Case Return AHE28xxS -SLV Output Return SLV www.irf.com 5 AHE28XXS Series 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 (pin9) 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. See Part Number section. Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 5962-89683 5962-91580 5962-91625 6 Vendor Cage Code 52467 52467 52467 IR Standard Part Number AHE2805S AHE2812S AHE2815S www.irf.com AHE28XXS Series Mechanical Outlines Non-Flanged Flanged 0.050 0.800 6 10 8 7 4 5 4 X 0.400 =1.600 3 1.110 2.110 Max 2 2.560 1 2.880 Max 9 0.040 D X 0.26 L Pins Ø 0.162 2 Holes 0.495 Max 2.110 0.495 Pin Designation Pin # Designation 1 + Input 2 Inhibit Input 3 Output Adjust * 4 Output Return 5 + Output 6 NC 7 NC 8 Case Ground 9 NC or Sync. 10 Input Return * AHE2805S only. AHE2812S / 2815S have NC on Pin 3 www.irf.com 7 AHE28XXS Series Device Screening Requirement MIL-STD-883 Method Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual No Suffix ES d -20°C to +85°C -55°C to +125°C 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 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 N/A N/A PIND 2020 N/A N/A Burn-In 1015 N/A 48 hrs@hi temp Final Electrical MIL-PRF-38534 25°C 25°C d 160 hrs@125°C 160 hrs@125°C -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +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 N/A N/A N/A External Visual 2009 Yes Yes Yes c 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 S F /CH - MSTR Model Input Voltage Nominal Sync Option MSTR = Master SLV = Slave Omit for Standard Screening Level (Please refer to Screening Table) 28 = 28V No Suffix, ES, HB, CH Output Voltage Package Option 05 = 5V 12 = 12V 15 = 15V Output F = Flange Blank = Non-Flanged S = Single 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 8 www.irf.com