AHE2805S/ES

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 AHE 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 Features at a nominal switching frequency of 250KHz. Input to 17V to 40VDC Input Range (28VDC Nominal) output isolation is achieved through the use of V, 12V and 15V Outputs Available transformers in the forward and feedback circuits. Indefinite Short Circuit and Overload Protection 3 The advanced feedback design provides fast loop 17 W/in Power Density response for superior line and load transient 15W and 20W Output Power Models characteristics and offers greater reliability and radiation Fast Loop Response for Superior Transient tolerance than devices incorporating optical feedback Characteristics circuits. Operating Temperature Range from -55C to +125C Available Three standard temperature grades are offered with Popular Industry Standard Pin-Out screening options. Refer to Part Number section. They Resistance Seam Welded Case for Superior can be provided in a standard plug-in package for PC Long Term Hermeticity mounting or in a flanged package for more severe Efficiencies up to 84% environments. Shutdown from External Signal Military Screening Manufactured in a facility fully qualified to MIL-PRF- 325,000 hour MTBF at 85C (AUC) 38534, these converters are fabricated utilizing DSCC Standard Microcircuit Drawings Available 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 1 AHE28XXS Series Specifications T = -55C to +85C, V = +28V 5% unless otherwise specified CASE IN Absolute Maximum Ratings 1 -0.5V to +50VDC Input Voltage Power Output Internally limited, 17.5W typ. for AHE2805S, 22.5W typ. for AHE2812S and AHE2815S Soldering Temperature 300C for 10 seconds 1 Operating Temperature -55C to +125C Temperature Range Storage Case Temperature -65C to +135C Parameter Conditions AHE2805S AHE2812S AHE2815S -55C Tc +85C Vin = 28 Vdc 5%,C = 0 L Unless otherwise specified Min Typ Max Min Typ Max Min Typ Max Units Static Characteristic OUTPUT Voltage V =17 to 40 VDC 4.90 5.00 5.10 11.76 12.00 12.24 14.70 15.00 15.30 VDC IN 0.0 3000 0.0 1667 0.0 1333 mADC Current IOUT=0 to Full Load Ripple Full Load, DC to 1MHz 20 60 30 60 30 60 mVp-p T = 25 C, I = 0 CASE OUT 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 VDC Accuracy 1 Power 15 20 20 W REGULATION Line V = 17 to 40 VDC % IN 0.5 1.0 0.5 1.0 0.5 1.0 Load IOUT = to Full Load 0.5 1.0 0.5 1.0 0.5 1.0 INPUT 4 Voltage Range 17 28 40 17 28 40 17 28.0 40 VDC Current Inhibited 8.0 18 8.0 18 8.0 18 mADC No Load 35 35 35 mADC Ripple Current Full Load 20 50 25 50 25 50 mV p-p Efficiency TCASE = +25 C Half Load to Full Load 80 82 79 83 80 84 % Capacitive Load No effect on performance 500 200 200 F Load fault power 4 dissipation 6.0 6.0 6.0 W Isolation Input to Output 500Vdc 100 100 100 M Dynamic Characteristic Step Load Changes Output 50% Load 100% Load mVpk 150 200 200 Transient No Load 50% Load -300 -400 -400 mVpk 50% Load No Load +300 +400 +400 mVpk 2 Recovery 50% Load 100% Load 25 25 25 s No Load 50% Load 500 500 500 s 50% Load No Load 7.0 7.0 7.0 msec Step Line Changes Output Transient Input step 17 to 40VDC +180 +180 +180 mVpk 2 Recovery Input step 40 to 17VDC -600 -600 -600 mVpk Input step 17 to 40VDC 400 400 400 s Input step 40 to 17VDC 400 400 400 s Turn-On VIN = 17 to 40VDC 3 Overshoot Delay IOUT = 0 to Full load 0 500 300 600 300 500 mVpk 8.0 14 8.0 14 8.0 14 ms Load Fault VIN = 17 to 40VDC 8.0 14 8.0 14 8.0 14 ms 4 Recovery Weight Standard Package 55 55 55 g Flange Package 58 58 58 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 has returned to within 1.0% of V at 50% load. OUT OUT 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