AHE2800S Series Hybrid - High Reliability DC/DC Converters DESCRIPTION The AHE2800S 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-704 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 250 KHz. 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 fully qualified to MIL-PRF-38534. All processes used to manufacture these converters have been qualified to enable Lambda 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 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. Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact Lambda Advanced Analog with specific requirements. FEATURES ■ 17-40VDC input range (28VDC nominal) ■ 5V, 12V and 15V outputs available ■ Indefinite short circuit and overload protection ■ 17W/in3 power density ■ 15 and 20 watts 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) SPECIFICATIONS TCASE = -55°C to +85°C, VIN = + 28V ±5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage1 Power Output Soldering Temperature Range1 -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 Parameter ±5%, C=0, unless otherwise specified STATIC CHARACTERISTICS OUTPUT VIN = 17 TO 40 VDC Voltage IOUT = 0 TO Full Load Current Ripple Full Load, DC to 1MHz Accuracy TCASE = 25°C, IOUT = 0 Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Min 4.90 0.0 4.95 15 VIN = 17 to 40VDC IOUT = 0 to Full Load 17.0 Inhibited No Load Full Load EFFICIENCY TCASE = +25°C Half Load to Full Load CAPACITIVE LOAD No effect on performance AHE2805S Typ Max 5.00 5.10 3000 20 60 5.00 5.05 ±0.5 ±0.5 ±1.0 ±1.0 28.0 8 40.0 18 35 50 20 80 82 11.88 20 17.0 12.00 12.24 1667 30 60 12.00 12.12 ±0.5 ±0.5 ±1.0 ±1.0 28.0 8 40.0 18 35 50 25 83 Input to Output @ 500VDC Input step 17 to 40VDC Input step 40 to 17V DC Input step 17 to 40VDC Input step 40 to 17VDC TURN-ON Overshoot Delay3 VIN = 17 to 40VDC IOUT = 0 to Full Load LOAD FAULT RECOVERY4 WEIGHT 100 Min AHE2815S Typ Max 14.70 0.0 14.85 20 17.0 15.00 VDC mADC mVpp VDC W ±0.5 ±0.5 ±1.0 ±1.0 % % 28.0 8 40.0 18 35 50 VDC mADC mADC mV p-p 84 % 200 µF 6 100 Units 15.30 1333 30 60 15.00 15.15 25 80 200 6 DYNAMIC CHARACTERISTICS STEP LOAD CHANGES Output 50% Load 100% Load Transient No Load 50% Load 50% Load No Load 50% Load 100% Load Recovery2 No Load 50% Load 50% Load No Load STEP LINE CHANGES Output Transient Recovery2 AHE2812S Typ Max 11.76 0.0 79 500 LOAD FAULT POWER DISSIPATION4 ISOLATION Min 6 100 W MΩ ±150 -300 +300 25 500 7 ±200 -400 +400 25 500 7 ±200 -400 +400 25 500 7 mVpk mVpk mVpk µsec µsec msec +180 -600 400 400 +180 -600 400 400 +180 -600 400 400 mVpk mVpk µsec µsec 0 8 500 14 300 8 600 14 300 8 500 14 mVpk msec VIN = 17 to 40VDC 8 14 8 14 8 14 msec Standard Package Flange Package 55 58 55 58 grams grams 55 58 Notes: 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 SPECIFICATIONS TCASE = -55°C to +105°C, VIN = + 28V ±5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage5 Power Output Soldering Temperature Range1 -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 Parameter ±5%, C=0, unless otherwise specified STATIC CHARACTERISTICS OUTPUT VIN = 17 TO 40 VDC Voltage IOUT = 0 TO Full Load Current Ripple Full Load, DC to 1MHz Accuracy TCASE = 25°C, IOUT = 0 Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Min AHE2805S/ES Typ Max 4.90 0.0 4.95 15 VIN = 17 to 40VDC IOUT = 0 to Full Load 17.0 Inhibited No Load Full Load 5.00 5.10 3000 20 60 5.00 5.05 ±0.5 ±0.5 ±1.0 ±1.0 28.0 8 40.0 18 35 50 20 EFFICIENCY TCASE = +25°C Half Load to Full Load CAPACITIVE LOAD No effect on performance 500 Input to Output @ 500VDC 100 78 82 11.76 0.0 11.88 20 17.0 12.00 12.24 1667 30 60 12.00 12.12 ±0.5 ±0.5 ±1.0 ±1.0 28.0 8 40.0 18 35 50 25 79 83 Input step 17 to 40VDC Input step 40 to 17V DC Input step 17 to 40VDC Input step 40 to 17VDC TURN-ON Overshoot Delay3 VIN = 17 to 40VDC IOUT = 0 to Full Load LOAD FAULT RECOVERY4 WEIGHT Min AHE2815S/ES Typ Max 14.70 0.0 14.85 20 17.0 15.00 VDC mADC mVpp VDC W ±0.5 ±0.5 ±1.0 ±1.0 % % 28.0 8 40.0 18 35 50 VDC mADC mADC mV p-p 25 80 84 % µF 6 100 Units 15.30 1333 30 60 15.00 15.15 200 6 DYNAMIC CHARACTERISTICS STEP LOAD CHANGES Output 50% Load 100% Load Transient No Load 50% Load 50% Load No Load 50% Load 100% Load Recovery2 No Load 50% Load 50% Load No Load STEP LINE CHANGES Output Transient Recovery2 AHE2812/ES Typ Max 200 LOAD FAULT POWER DISSIPATION4 ISOLATION Min 6 100 W MΩ ±150 -300 +300 25 500 7 ±200 -400 +400 25 500 7 ±200 -400 +400 25 500 7 mVpk mVpk mVpk µsec µsec msec +180 -600 400 400 +180 -600 400 400 +180 -600 400 400 mVpk mVpk µsec µsec 0 8 500 14 VIN = 17 to 40VDC 8 14 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: 1. Above +105°C case temperature, derate output power linearly to 0 at 125°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%. 5. Above +85°C case temperature, derate maximum input voltage linearly to 33V at +125°C case. 3 SPECIFICATIONS TCASE = -55°C to +125°C, VIN = + 28V ±5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage1 Power Output Soldering Temperature Range1 -0.5V to +50V Internally Limited, 17.5W typical for AHE2805S/HB&CH, 22.5W typical for AHE2812S/HB&CH and AHE2815S/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 Parameter ±5%, C=0, unless otherwise specified STATIC CHARACTERISTICS OUTPUT VIN = 17 TO 40 VDC Voltage IOUT = 0 TO Full Load Current Ripple Full Load, DC to 1MHz Accuracy TCASE = 25°C, IOUT = 0 Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current AHE2805S/HB&CH Min Typ Max 4.90 0.0 4.95 15 VIN = 17 to 40VDC TCASE = 25°C IOUT = 0 to Full Load 5.00 5.10 3000 20 60 5.00 5.05 1025 10 17.0 Inhibited No Load Full Load 28.0 8 20 AHE2812S/HB&CH Min Typ Max AHE2815S/HB&CH Min Typ Max 11.76 0.0 14.70 0.0 11.88 20 12.00 12.24 1667 30 60 12.00 12.12 30 5 50 40.0 18 35 50 60 50 17.0 14.85 20 28.0 8 25 40 30 120 40.0 18 35 50 15.00 15.30 1333 30 60 15.00 15.15 75 50 17.0 28.0 8 25 mv 35 150 40.0 18 35 50 Units VDC mADC mV p-p VDC W mv VDC mADC mADC mV p-p EFFICIENCY TCASE = +25°C Full Load 80 82 80 83 80 84 % CAPACITIVE LOAD No effect on performance 500 1000 200 1000 200 1000 µF LOAD FAULT POWER DISSIPATION Short Circuit TC = 25°C Overload TC = 25°C ISOLATION Input to Output @ 500VDC DYNAMIC CHARACTERISTICS STEP LOAD CHANGES 50% Load 100% Load Output TC = 25°C Transient No Load 50% Load 50% Load No Load 50% Load 100% Load Recovery2 No Load 50% Load 50% Load No Load STEP LINE CHANGES Output TC = 25°C Transient Recovery2 Input Step 17 to 40VDC Input Step 40 to 17VDC Input Step 17 to 40VDC Input Step 40 to 17VDC TURN-ON Overshoot Delay3 VIN = 17 to 40VDC IOUT = 0 to Full Load LOAD FAULT RECOVERY4 VIN = 17 to 40VDC WEIGHT Standard Package Flange Package 4.5 6 100 4.5 6 100 4.5 6 100 W W MΩ ±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 +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 8 550 10 300 8 600 10 300 8 500 10 mVpk msec 8 10 8 10 8 10 msec 55 58 grams grams 55 58 55 58 Notes: 1. Above +125°C case temperature, derate output power linearly to 0 at 135°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%. 4 BLOCK DIAGRAM INPUT FILTER 1 OUTPUT FILTER 5 ERROR AMP & REF 3 CONTROLLER 2 9 10 4 APPLICATION INFORMATION Inhibit Function 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). Lambda Advanced Analog 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 ±1VDC. EMI Filter An optional EMI filter (AFC461) will reduce the input ripple current to levels below the limits imposed by MIL-STD-461 CEO3. 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. Output Adjust (AHE2805) only The output voltage of the AHE2805 can be adjusted upward by connecting Output Adjust (Pin 3) and Output Common (Pin 4) as shown in Table 1. Resistance Pin 3 to 4 Output Voltage Increase % × 0 390k + 1% 145k + 2% 63k + 3% 22k + 4% 0 + 5% The appropriate parts must be ordered to utilize this feature. After selecting the converters required for the system, an ‘MSTR’ suffix is added for the master converter part number and an ‘SLV’ suffix is added for slave part number. See Part Number section. Table 1 Output adjustment resistor values 5 STANDARDIZED MILITARY DRAWING CROSS REFERENCE 1 FILTER AFC461 10 5 AHE2805S/ES-MSTR 4 MASTER +5 V COMM 2 1 10 AHE2815D/ES-SLV SLAVE 3 4 5 +15 V COMM –15 V SYSTEM BUS 1 10 5 AHE2812S/ES-SLV SLAVE 4 +12 V COMM Standardized military drawing PIN Vendor CAGE number Vendor similar PIN 5962-8968301HXX 52467 AHE2805S/CH 5962-8968301HZX 52467 AHE2805SF/CH 5962-8968302HXX 52467 AHE2805S/CH-SLV 5962-8968302HZX 52467 AHE2805SF/CH-SLV 5962-8968303HXX 52467 AHE2805S/CH-MSTR 5962-8968303HZX 52467 AHE2805SF/CH-MSTR Standardized military drawing PIN Vendor CAGE number 5962-9158001HXX 52467 AHE2812S/CH 5962-9158001HZX 52467 AHE2812SF/CH 5962-9158002HXX 52467 AHE2812S/CH-SLV 5962-9158002HZX 52467 AHE2812SF/CH-SLV 5962-9158003HXX 52467 AHE2812S/CH-MSTR 5962-9158003HZX 52467 AHE2812SF/CH-MSTR Standardized military drawing PIN Vendor CAGE number 5962-9162501HXX 52467 AHE2815S/CH 5962-9162501HZX 52467 AHE2815SF/CH 5962-9162502HXX 52467 AHE2815S/CH-SLV 5962-9162502HZX 52467 AHE2815SF/CH-SLV 5962-9162503HXX 52467 AHE2815S/CH-MSTR 5962-9162503HZX 52467 AHE2815SF/CH-MSTR 92 Typical Synchronization Connection Diagram PIN DESIGNATION Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Positive Input Inhibit Input Output adjust* Output common Positive output Pin 10 Input common Pin 9 N/C or sync Pin 8 Case gnd Pin 7 N/C Pin 6 N/C *AHE2805S only. AHE2812S/2815S have N/C on Pin 3 PART NUMBER AHE 28 xx S x / x - xxx Model Input Voltage Synchronization Option MSTR—Master SLV—Slave Output Voltage 05 – 5VDC 12 – 12VDC 15 – 15VDC Temperature Range Omit for -55°C to +85°C ES – -55°C to +105°C HB – -55°C to +125°C Single Output Package option F – Flange Omit Standard 6 Vendor similar PIN Vendor similar PIN AHE2812S EFFICIENCY Efficiency ( % ) Temperature Rise (½C) AHE2805S OUTPUT POWER DERATING vs AMBIENT TEMPERATURE Output Power ( Watts ) Ambient Temperature ( ½C ) AHE2815S EFFICIENCY Efficiency (%) Temperature ( ½C ) AHE2805 TEMPERATURE RISE ABOVE AMBIENT vs OUTPUT POWER Output Power (Watts) Output Power (Watts) Efficiency (%) AHE2812S EFFICIENCY Output Power (Watts) 7 8 9 MECHANICAL OUTLINE Input Common .090R max 1.12max (34.163) 0.800 (20.320) N/C or sync 10 9 Case Ground Pin #1 1 Pos. Input Inhibit Input Bottom View Output Adjust Output Common 0.040D x 0.260L (1.016) (6.604) N/C 2.110 (53.594) 6 5 Pos. Output AHE2805S 0.495 12.573 4 x 0.400 = 1.600 (10.160) (40.640) Standard 2.870 ± .010 (72.898 ±.254) Input Common .050R 1.110* (28.194) 0.800* (20.320) N/C or sync 10 9 Case Ground Pin #1 1 Pos. Input Inhibit Input Bottom View N/C Output Common 2.550* ± .010 (64.770) 0.162D* 2 places (4.115) 2.120 max N/C 6 5 Pos. Output AHE2812S/AHE2815S 0.050* typ (1.270) 0.495* (12.573) 4 x 0.400*= 1.600* (10.160) (40.640) *±.005 (±0.127) 0.040D* x 0.260L (1.016) (6.604) F option HB & CH SCREENING PROCESS ES SCREENING PROCESS Per MIL-STD-883 Same as HB screening except as follows: Test Inspection Pre-Seal Internal Visual Stabilization Bake Temperature Cycling Constant Acceleration Burn-in Final Electrical Test External Visual Gross Leak Fine Leak Method 2017 1008 1010 2001 1015 2009 1014 1014 Test Inspection Conditlon C C A, Y1 direction TC = +125°C TC = -55,+25,+125°C C A 10 Constant Acceleration Burn-in Final Electrical Method 2001, 500g's 1015, 96 hrs. 25°C only NOTES Lambda Advanced Analog The information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is assumed for possible errors. These specifications are subject to change without notice. LAMBDA ADVANCED ANALOG INC. λ MIL-PRF-38534 Certified ISO9001 Registered 9849 2270 Martin Avenue Santa Clara CA 95050-2781 (408) 988-4930 FAX (408) 988-2702