PD-94540A ASA28XXD SERIES 28V Input, Dual Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description The ASA28XXD Series of DC/DC converters are high reliability thick film hybrid converters that use flyback ASA topology operating at a nominal frequency of 550KHz. High input to output isolation is achieved through the use of transformers in the flyback power and feed back circuits. Features The advanced feedback design provides fast loop Up To 5.0W Output Power response for superior line and load transient 5V, 12V, 15V Outputs characteristics and offers greater reliability than devices High Reliability incorporating optical feedback circuits. Wide Input Voltage Range -16V To 40V Indefinite Short Circuit and Overload Protection This device is designed to meet MIL-STD-704 input Popular Industry Standard Pin-Out requirements offering full performance over a 16V to Military Screening 40V input range. Output Power of up to 5W is available Parallel Seam Welded Package for either balanced or unbalanced loads. No External Capacitors Required Input Voltage Surge Protected to MIL-STD-704 Connecting the inhibit pin (pin 5) to the input common Under Voltage Lockout (pin 7) will cause the converter to shut down. It is Standard Microcircuit Drawings Available recommended that the inhibit pin be driven by an open collector device capable of sinking at least 400 A. The open circuit voltage of the inhibit pin is 11.5 0.5V. Manufactured in a facility fully qualified to MIL-PRF- 38534, 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 1 01/11/07ASA28XXD Series Specifications Absolute Maximum Ratings Input voltage -0.5V to +50VDC Continous, 80V, 100 msec Power output Internally limited ( 6.5W typical ) Soldering temperature 300C for 10 seconds Operating case temperature -55C to +125C Storage case temperature -65C to +135C Conditions ASA2805D/XX ASA2812D/XX ASA2815D/XX -55 TC +125C Group A V = 28V dc 5% C = 0 IN L Subgroups Min Max Min Max Min Max unless otherwise specified TEST Unit 1 4.95 5.05 11.88 12.12 14.85 15.15 Output voltage V I = 0 OUT 2, 3 4.90 5.10 11.76 12.24 14.70 15.30 1, 2 Output current V = 16, 28, and 40 V dc 1, 2, 3 200 1000 84 333 67 267 mA IN either output 3, 4 1, 2, 3 470 200 290 Output ripple voltage V = 16, 28 and 40 V dc mV IN PP 4 1, 2, 3 50 50 50 mV Line regulation V = 16, 28, and 40 V dc IN I = 0, 50%, 100% I OUT MAX 4 1, 2, 3 50 50 50 mV Load regulation V = 16, 28, and 40 V dc IN I = 0, 50%, 100% I OUT MAX 5 20% to 80% load change 1, 2, 3 15 8.0 8.0 % Cross regulation I = 0 OUT 12 12 1 2 Input current 1, 2, 3 mA Pin 5 connected to pin 7 60 60 60 I = 0 Pin5 open OUT 3, 4 1, 2, 3 100 100 100 Input ripple current I = I mA OUT MAX PP 4 1, 3 70 71 71 Efficiency I = I % OUT MAX 2 66 68 68 Isolation Input to output or any pin to case (except pin 8) at 500 V 1 100 100 100 M dc, Tc = +25 C 6, 7 No effect on dc performance, Capacitive load 4 200 200 200 F total for both outputs 8 Power dissipation load fault 4.0 4 .0 4. 0 Overload 1, 2, 3 W Short circuit 2.0 2.0 2.0 4 4, 5, 6 500 600 500 600 500 600 KHz Switching frequency I = I OUT MAX -400 +400 -400 +400 -400 +400 I = 50% 100% I Output response to step OUT MAX 4, 5, 6 4, 9 mV pk transient load changes -800 +800 -800 +800 -800 +800 I = 0 50% I OUT MAX 100 Recovery time, step 100 100 I = 50% 100% I OUT MAX 4, 5, 6 transient load changes s 4, 9, 10 2000 2000 2000 I = 0 50% I OUT MAX Output response transient 4, 5, 6 -750 +750 - 750 +750 -750 +750 mV pk V =16 40Vdc,I = I 4, 7, 11 IN OUT MAX step line changes Recovery time transient step 4, 5, 6 1200 1200 1200 s line changes V =16 40Vdc, I = I IN OUT MAX 4, 7, 10, 11 4 4, 5, 6 600 600 600 mV pk Turn on overshoot I = 0 and I OUT MAX 4, 12 4, 5, 6 25 25 25 ms Turn on delay I = 0 and I OUT MAX 7 4, 5, 6 25 25 25 ms Load fault recovery For Notes to Specifications, refer to page 3 2 www.irf.com