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 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. The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability than devices incorporating optical feedback circuits. This device is designed to meet MIL-STD-704 input requirements offering full performance over a 16V to 40V input range. Output Power of up to 5W is available for either balanced or unbalanced loads. Connecting the inhibit pin (pin 5) to the input common (pin 7) 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. The open circuit voltage of the inhibit pin is 11.5 ± 0.5V. ASA Features Up To 5.0W Output Power ±5V, ±12V, ±15V Outputs High Reliability Wide Input Voltage Range -16V To 40V Indefinite Short Circuit and Overload Protection Popular Industry Standard Pin-Out Military Screening Parallel Seam Welded Package No External Capacitors Required Input Voltage Surge Protected to MIL-STD-704 Under Voltage Lockout Standard Microcircuit Drawings Available Manufactured in a facility fully qualified to MIL-PRF38534, 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 01/11/07 ASA28XXD Series Specifications Absolute Maximum Ratings Input voltage Power output Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC Continous, 80V, 100 msec Internally limited ( 6.5W typical ) 300°C for 10 seconds -55°C to +125°C -65°C to +135°C Conditions -55° ≤ TC ≤+125°C V IN = 28V dc ±5% C L = 0 unless otherwise specified TEST Output voltage Output current ASA2812D/XX ASA2815D/XX Min Max Min Max Min Max 1 ±4.95 ±5.05 ±11.88 ±12.12 ±14.85 ±15.15 2, 3 ±4.90 ±5.10 ±11.76 ±12.24 ±14.70 ±15.30 VIN = 16, 28, and 40 V dc either output 1, 2, 3 200 1000 84 333 67 267 mA VIN = 16, 28 and 40 V dc 1, 2, 3 470 200 290 mV PP VIN = 16, 28, and 40 V dc 1, 2, 3 50 50 50 mV 1, 2, 3 50 50 50 mV 20% to 80% load change 1, 2, 3 15 8.0 8.0 % IOUT = 0 Pin 5 connected to pin 7 1, 2, 3 12 12 12 60 60 60 100 100 100 IOUT = 0 1, 2 3, 4 Output ripple voltage Line regulation ASA2805D/XX 4 Group A Subgroups Unit V IOUT = 0, 50%, 100% IMAX 4 Load regulation VIN = 16, 28, and 40 V dc IOUT = 0, 50%, 100% IMAX 5 Cross regulation Input current IOUT = 0 Pin5 open 3, 4 Input ripple current Efficiency IOUT = IMAX 4 Capacitive load 1, 3 70 71 71 2 66 68 68 Input to output or any pin to case (except pin 8) at 500 V dc, Tc = +25° C 1 100 100 100 No effect on dc performance, total for both outputs 4 200 IOUT = IMAX Isolation 6, 7 Power dissipation load fault 1, 2, 3 Overload 8 1, 2, 3 Short circuit 4 Switching frequency Output response to step transient load changes IOUT = IMAX 4, 9 Recovery time, step transient load changes 4, 9, 10 4, 5, 6 IOUT = 0 50% IMAX IOUT = 50% 100% IMAX step line changes 4, 7, 11 Recovery time transient step line changes 4, 7, 10, 11 Turn on overshoot 4 4, 12 Load fault recovery MΩ 200 µF W 4.0 4.0 4.0 2.0 2.0 2.0 600 500 600 500 600 -400 +400 -400 +400 -400 +400 -800 +800 -800 +800 -800 +800 KHz mV pk 100 100 100 2000 2000 2000 4, 5, 6 VIN =16 40Vdc,IOUT= IMAX 4, 5, 6 VIN=16 40Vdc, IOUT= IMAX 4, 5, 6 1200 IOUT = 0 and IMAX 4, 5, 6 IOUT = 0 and IMAX 7 mA PP % 500 IOUT = 0 50% IMAX Output response transient Turn on delay IOUT = 50% 100% IMAX 4, 5, 6 200 mA -750 +750 - 750 +750 -750 µs +750 mV pk 1200 1200 µs 600 600 600 mV pk 4, 5, 6 25 25 25 ms 4, 5, 6 25 25 25 ms For Notes to Specifications, refer to page 3 2 www.irf.com ASA28XXD Series Notes to Specifications 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Parameter guaranteed by line, load, and cross regulation tests. Up to 80% of full power is available from either output provided the total output does not exceed 5W. Bandwidth of DC to 20MHz is guaranteed by design. Tested for 20KHz to 2MHz. Load current split equally between +V OUT and -VOUT . 1.0W load on output under test, 1.0W to 4.0W load change on other output. Capacitive load may be any value from 0 to the maximum limit without compromising DC performance. A capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the limits specified. An overload is a condition with a load in excess of rated but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. Load step transition time between 2µs and 10µs. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1% of V OUT at 50% load. Input step transition time between 2µs and 10µs. Turn-on delay time measurements is for either a step application of power at the input or the removal of ground connection from enable pin (pin 5) with power applied to the input. Block Diagram +Output +Input 1 6 Output Return 2 -Output 3 Error Amplifier Input Return Case 7 8 Inhibit 5 www.irf.com Controller 3 ASA28XXD Series Mechanical Outline 1.075 0.800 1 2 3 0.270 4 5 1.075 8 7 0.800 ±.005 6 0.025 ± .003 Dia Pins 0.220 Pin Designation Pin # Designation 1 + Output 2 Output Return 3 - Output 4 NC 5 Inhibit 6 + Input 7 Input Return 8 Case Ground Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 4 IR Standard Part Number 5962-94649 ASA2815D 5962-95648 ASA2812D www.irf.com ASA28XXD Series Device Screening Requirement MIL-STD-883 Method ES HB CH -20°C to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C Temperature Range Element Evaluation No Suffix MIL-PRF-38534 N/A N/A N/A Class H 2023 N/A N/A N/A N/A 2017 Yes Yes Yes Non-Destructive Bond Pull Internal Visual Temperature Cycle 1010 N/A Cond B Cond C Cond C Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs N/A N/A PIND 2020 N/A N/A Burn-In 1015 N/A 48 hrs@hi temp Final Electrical MIL-PRF-38534 25°C 25°C 160 hrs@125°C 160 hrs@125°C -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +125°C +125°C PDA MIL-PRF-38534 N/A N/A N/A 10% Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C Radiographic 2012 N/A N/A N/A N/A External Visual 2009 Yes Yes Yes Notes: Best commercial practice Sample tests at low and high temperatures -55°C to +105°C for AHE, ATO, ATW Part Numbering ASA 28 05 D /CH Model Screening Level Input Voltage No Suffix, ES, HB, CH 28 = 28V Output Voltage 05 = ±5V 12 = ±12V 15 = ±15V (Please refer to Screening Table) Output D = Dual WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 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. 01/2007 www.irf.com 5