PD - 94554A AHE28XXS SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS 28V Input, Single Output 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. These converters are manufactured in a facility certified to MIL-PRF-38534. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Two screening grades are available to satisfy a wide range of requirements. The CH grade converters are fully compliant to MIL-PRF-38534 for class H. The HB grade converters are processed to full class H screening but do not have class H element evaluation as required by MIL-PRF-38534. Both grades are fully tested and operate over the full military temperature range without derating of output power. Variations in electrical, mechanical and screening can be accommodated. www.irf.com AHE Features n 17 to 40 VDC Input Range (28 VDC Nominal) n 5V, 12V and 15V Outputs Available n Indefinite Short Circuit and Overload Protection 3 n 17 W/in Power Density n 15 and 20 Watts Output Power Models 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 84% n Shutdown from External Signal n Military Screening n 325,000 hour MTBF at 85°C (AUC) Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact Advanced Analog with specific requirements. 1 10/28/02 AHE28XXS Series Specifications TCASE = -55°C to +85°C, VIN = +28V ± 5% unless otherwise specified n ABSOLUTE MAXIMUM RATINGS 1 Input Voltage Power Output Soldering 1 Temperature Range Parameter -0.5V to 50V Internally limited, 17.5W typical for AHE2805S, 22.5W typical for AHE2812S and AHE2815S 300°C for 10 seconds Operating -55°C to +125°C case Storage -65°C to +135°C Conditions -55°C ≤ Tc ≤ +85°C Vin = 28 Vdc ±5%,CL = 0 Unless otherwise specified AHE2805S AHE2812S 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 % % 28.0 8 40.0 18 35 50 28.0 8 40.0 18 35 50 28.0 8 40.0 18 35 50 VDC mADC mADC mV p-p 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 17.0 Inhibited No Load Full Load TCASE = +25°C Half Load to Full Load No effect on performance 20 80 500 82 2 Recovery Step Line Changes Output Transient 2 Recovery Turn-On 3 Overshoot Delay 25 79 200 83 6 17.0 25 80 200 84 6 % µF 6 W Input to Output @ 500Vdc 100 Dynamic Characteristic Step Load Changes Output Transient 17.0 100 100 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 ±200 -400 +400 25 500 7 ±200 -400 +400 25 500 7 mVpk mVpk mVpk µsec µsec 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 µsec µsec Load Fault 4 Recovery VIN = 17 to 40VDC 0 8 8 Weight Standard Package Flange Package 55 58 500 14 14 300 8 8 55 58 600 14 14 300 8 8 500 14 14 mVpk msec msec 55 58 grams grams 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 VOUT has returned to within ±1% 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 n ABSOLUTE5MAXIMUM RATINGS Input Voltage Power Output Soldering 1 Temperature Range Parameter -0.5V to 50V Internally limited, 17.5W typical for AHE2805S/ES, 22.5W typical for AHE2812S/ES and AHE2815S/ES 300°C for 10 seconds Operating -55°C to +125°C case Storage -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 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 % % 28.0 8 40.0 18 35 50 28.0 8 40.0 18 35 50 28.0 8 40.0 18 35 50 VDC mADC mADC mV p-p Static Characteristic OUTPUT Voltage Current Ripple VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25°C, IOUT = 0 Accuracy 1 Power REGULATION Line Load INPUT 4 Voltage Range Current 4.95 15 VIN = 17 to 40 VDC IOUT = 0 to Full Load 17.0 Inhibited No Load Full Load TCASE = +25°C Half load to Full load No effect on performance Ripple Current Efficiency Capacitive Load Load fault power 4 dissipation Isolation 20 78 500 82 25 79 200 83 6 17.0 25 80 200 84 6 % µF 6 W Input to Output @ 500Vdc 100 Dynamic Characteristic Step Load Changes Output Transient Recovery 17.0 2 100 100 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 ±200 -400 +400 25 500 7 ±200 -400 +400 25 500 7 mVpk mVpk mVpk µsec µsec msec Input step 17 to 40VDC Input step 40 to 17VDC Input step 17 to 40VDC Input step 40 to 17VDC +180 -600 400 400 +180 -600 400 400 +180 -600 400 400 mVpk mVpk µsec µsec Step Line Changes Output Transient 2 Recovery TURN –ON Overshoot 3 Delay VIN = 17 to 40VDC IOUT = 0 to Full Load 4 0 8 500 14 14 Load Fault Recovery VIN = 17 to 40VDC 8 Weight Standard Package Flange Package 60 65 300 8 600 14 8 14 60 65 300 8 750 14 mVpk msec 8 14 msec 60 65 grams grams 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 VOUT has returned to within ±1% of VOUT 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 n ABSOLUTE 1MAXIMUM RATINGS Input Voltage Power Output Soldering 1 Temp Range Parameter -0.5V to 50V Internally limited, 17.5W typical for AHE2805S/HB&CH, 22.5W typical for AHE281XS/HB&CH 300°C for 10 seconds Operating -55°C to +125°C case Storage -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 11.76 0.0 12.00 15.00 30 12.24 1667 60 14.70 0.0 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 35 mV 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 5 dissipation Isolation Dynamic Characteristic Step Load Changes Output TC =25°C Transient Recovery 2 Step Line Changes Output TC = 25°C Transient 2 Recovery TURN –ON Overshoot 3 Delay 4 Load Fault Recovery 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 10 17.0 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 80 500 28.0 8 20 82 1000 30 50 50 40.0 18 35 50 17.0 80 200 28.0 8 25 83 1000 4.5 6 100 120 50 40.0 18 35 50 17.0 80 200 28.0 8 25 84 1000 4.5 6 100 150 mV 40.0 18 35 50 VDC mADC mADC mV p-p % µF W W MΩ 4.5 6 100 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 ±200 -400 +400 25 500 ±300 -500 +500 70 1500 5 ±200 -400 +400 25 500 ±300 -500 +500 70 1500 5 mVpk mVpk mVpk µsec µsec msec 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 µsec µsec 0 8 8 55 58 550 10 10 300 8 8 55 58 600 10 10 300 8 8 500 10 10 55 58 mVpk msec msec grams grams 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 VOUT has returned to within ±1% of VOUT 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 AHE28XXS Block Diagram 5 + V ou t 1 EMI F ilter + Inp u t 4 R e tu rn 2 E n a ble D rive 1 P u lse W id th M o du lato r FB 9 S ync E rror Amp & Ref D rive 2 3 V ADJ In p ut R e tu rn 10 Application Information Inhibit Function Output Voltage Adjustment (AHE2805 only) 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. 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. 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. www.irf.com Table 1 Output adjustment resistor values Resistance Pin 3 to 4 (Ω) None 390K 145K 63K 22K 0 Output Voltage Increases (%) 0 +1% +2% +3% +4% +5% 5 AHE28XXS Series 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). Advanced Analog offers an option, which provides synchronization of multiple AHE/ATW/ATO type converters, thus eliminating this type of noise. 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. See Part Number section. Typical Synchronization Connection + In R e tu rn A FC 461 or A FV 461 O utput + In C a se R e tu rn O utput A H E 28xxS - M S TR R e tu rn R e tu rn M ST R +O utpu t + In C a se S ystem B us A H E 28xxD -S LV R e tu rn -O utput R e tu rn SL V + In C a se O utput A H E 28xxS -S LV R e tu rn R e tu rn SL V 6 www.irf.com AHE28XXS Series AHE28XXS Case Outlines Non-Flanged Flanged 0.050 0.800 1.110 10 8 7 6 5 0.495 M ax 4 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 Pins 0.495 Ø 0.162 2 H oles Part Numbering Pin Designation Pin No. 2.110 AHE 28 05 S F / CH - M STR Designation S ync O ptio n M ode l 1 Positive Input 2 Enable Input 3 Output Adjust * 4 Output Return 5 Positive Output 6 N/C 7 N/C 8 Case Ground 9 N/C or Sync. 10 Input Return M S TR = M a ster SL V = S la ve Input V oltage S cree nin g 28 = 28V – O utput V oltage 5 = ±5, 1 2 = ±12, 15 = ±15 , ES, H B, CH P ackag e O ption s O utputs S = S ing le D = D ual F = F la nge O m it fo r S tan dard * AHE2805S only. AHE2812S / 2815S have N/C on Pin 3 www.irf.com 7 AHE28XXS Series Available Screening Levels and Process Variations for AHE28XXS 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 & Specifications 1014 48hrs @ 85°C 25°C 48hrs @ 125°C 25°C 160hrs @ 125°C -55, +25, +125°C 160hrs @ 125°C -55, +25, +125°C 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 5962-8968301HXX 5962-8968301HZX 5962-8968302HXX 5962-8968302HZX 5962-8968303HXX 5962-8968303HZX Vendor CAGE Code 52467 52467 52467 52467 52467 52467 Vendor Similar PIN AHE2805S/CH AHE2805SF/CH AHE2805S/CH-SLV AHE2805SF/CHSLV AHE2805S/CH-MSTR AHE2805SF/CH-MSTR Standard Military Drawing PIN 5962-9162501HXX 5962-9162501HZX 5962-9162502HXX 5962-9162502HZX 5962-9162503HXX 5962-9162503HZX Vendor CAGE Code 52467 52467 52467 52467 52467 52467 Vendor Similar PIN AHE2815S/CH AHE2815SF/CH AHE2815S/CH-SLV AHE2815SF/CH-SLV AHE2815S/CH-MSTR AHE2815SF/CH-MSTR Standard Military Drawing PIN 5962-9158001HXX 5962-9158001HZX 5962-9158002HXX 5962-9158002HZX 5962-9158003HXX 5962-9158003HZX Vendor CAGE Code 52467 52467 52467 52467 52467 52467 Vendor Similar PIN AHE2812S/CH AHE2812SF/CH AHE2812S/CH-SLV AHE2812SF/CH-SLV AHE2812S/CH-MSTR AHE2812SF/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