PD-94555B AHE28XXD SERIES 28V Input, Dual Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description AHE 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 Features nominal 28VDC inputs with 5V, 12V and 15V dual 17V to 40VDC Input Range outputs to satisfy a wide range of requirements. The 28VDC Nominal Input circuit design incorporates a pulse width modulated push-pull topology operating in the feed-forward mode 5V, 12V and 15V Outputs Available at a nominal switching frequency of 250KHz. Input to Indefinite Short Circuit and Overload output isolation is achieved through the use of Protection 3 transformers in the forward and feedback circuits. 12.9W/in Power Density 15W Output Power Fast Loop Response for Superior Transient The advanced feedback design provides fast loop Characteristics response for superior line and load transient characteristics Operating Temperature Range from -55C to and offers greater reliability and radiation tolerance +125C Available than devices incorporating optical feedback circuits. Popular Industry Standard Pin-Out Resistance Seam Welded Case for Superior Manufactured in a facility fully qualified to MIL-PRF- Long Term Hermeticity 38534, these converters are fabricated utilizing DSCC Efficiencies up to 82% qualified processes. For available screening options, Shutdown from External Signal refer to device screening table in the data sheet. Military Screening Variations in electrical, mechanical and screening can 314,000 hour MTBF at 85C (AUC) be accommodated. Contact IR Santa Clara for special Standard Microcircuit Drawings Available requirements. www.irf.com 1 AHE28XXD Series Specifications AHE2805D Absolute Maximum Ratings Input voltage -0.5V to +50VDC Soldering temperature 300C for 10 seconds Operating case temperature -55C to +125C Storage case temperature -65C to +135C Table I. Electrical Performance Characteristics Test Symbol Conditions Group A Device Limits Unit Subgroups Types -55C Tc +125C Vin = 28 Vdc 5%, C = 0 L Unless otherwise specified Min Max Output voltage V I = 0 1 All V OUT OUT 4.95 5.05 2,3 4.90 5.10 9, 11 I V = 17, 28, and 40 V dc 1,2,3 All 0.0 625 mA Output current OUT IN 8, 9 V V = 17, 28, and 40 V dc, 1,2,3 All 60 mVp-p Output ripple voltage RIP IN B.W. = DC to 2MHz 4, 9, 11 P V =17,28, and 40 V dc 1,2,3 All 15 W Output power OUT IN 9 Line VR V = 17, 28, and 40 V dc, 1 25 All mV LINE IN 10 I = 0, 313, and 625mA out Regulation 2,3 50 Load VR V = 17, 28, and 40 V dc, 1,2,3 All 110 mV LOAD IN 9 Regulation I = 0, 313,and 625 OUT mA Input current I I = 0, inhibit (pin 2) 1,2,3 All 18 mA IN OUT tied to input return (pin 10) I = 0, 40 OUT inhibit (pin 2) = open 8 I 1,2,3 All 50 mAp-p Input ripple current RIP I = 625mA OUT B.W. = DC to 2MHz Efficiency E 1 All 80 % FF IOUT = 625mA T = +25C C Isolation ISO Input to output or any pin 1 All 100 M to case (except pin 8) at 500V dc Tc = +25C 6, 12 C No effect on dc 4 All 200 F Capacitive load L performance, Tc = +25C 3 Power dissipation P 1 All 6.0 W D Overload, T = +25C C load fault 1 6.0 Short circuit, T = +25 C C 9 F 4,5,6 01 225 275 KHz Switching frequency S I = 625mA OUT 02 225 245 03 250 275 Output response to step VO 50% load to/from100%load 4 All -300 +300 TLOAD 7 transient load changes 5,6 -450 +450 mVpk No load to/from 50% load 4 All -500 +500 5,6 -750 +750 For Notes to Specifications, refer to page 3 2 www.irf.com