PD-94539A ASA28XXS SERIES 28V Input, Single Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description The ASA28XXS 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 feedback 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-704D input requirements offering full performance over a 16V to 40V input range. Output Power of up to 5W is available. 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. 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 requirements can be accommodated. Extensive computer simulation using complex modeling allows design modifications to be examined. Contact IR Santa Clara with specific requirements. www.irf.com 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 Available Parallel Seam Welded Package No External Capacitors Required Input Voltage Surge Protected to MIL-STD-704A Under Voltage Lockout Available as Standard Military Drawing Standard Microcircuit Drawings Available 1 01/11/07 ASA28XXS Series Specifications Absolute Maximum Ratings Input voltage -0.5V to +50VDC Continous, 80V, 100 msec Power output Internally limited ( 6.5W typical ) Soldering temperature 300°C for 10 seconds Operating case temperature -55°C to +125°C Storage case temperature -65°C to +135°C Conditions -55° ≤ TC ≤+125°C VIN = 28V dc ±5% C L = 0 unless otherwise specified TEST Output voltage Output current IOUT = 0 1 2 Output ripple voltage Line regulation Load regulation 2 Efficiency 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 Capacitive load Power dissipation, load fault Switching frequency 4 Output response to step 6 transient load changes 1000 417 333 mA 190 200 200 mV PP 2, 3 475 290 290 VIN = 16, 28, and 40 V dc IOUT = 0, 50%, 100% IMAX 1 25 ±25 ±25 2, 3 50 ±50 ±50 VIN = 16, 28, and 40 V dc IOUT = 0, 50%, 100% IMAX 1 25 ±25 ±25 2, 3 50 ±50 ±50 IOUT = IMAX 1, 2, 3 1, 2, 3 1 VTEST 500 Vdc, Tc= +25°C 1 No effect on dc performance, Tc = +25°C 4 Overload 5 IOUT = IMAX ½ IMAX IMAX 18 50 100 100 100 100 1, 2, 3 71 71 68 68 100 100 200 4.0 4.0 4.0 2.0 2.0 2.0 500 600 -300 +300 5, 6 -450 +450 4 -500 +500 5, 6 -750 +700 mA PP MΩ 200 4 mA % 500 4, 5, 6 mV 500 600 500 600 -450 +450 -400 +450 -750 +750 -800 +750 µF W KHz mV pk 100 100 µs 1.0 1.0 1.0 ms 4, 5, 6 500 1000 1000 mV pk Input step 16 40 V dc IOUT = IMAX 4, 5, 6 800 800 800 µs IOUT = 0 mA, IMAX 4, 5, 6 600 600 600 mV pk IOUT = IMAX Output response transient step line 4 8 changes Input step 16 40 V dc IOUT = IMAX Recovery time transient 4, 7, 8 step line changes Turn on overshoot Load fault recovery 18 50 mV 200 Recovery time, step transient load changes Turn on delay 18 50 66 Short circuit 0 mA IMAX 9 V 1 2, 3 3, 4 Unit 1, 2, 3 IOUT = IMAX Isolation - Input to output or any pin to case ASA2815S/xx VIN = 16, 28 and 40 V dc IOUT = 0 Pin5 open Input ripple current ASA2812S/xx VIN = 16, 28, and 40 V dc IOUT = 0 Pin 5 to Pin 7 Input current ASA2805S/xx Group A Subgroups 0 mA ½ IMAX IOUT = 0 or IMAX 4 4, 5, 6 4, 5, 6 20 25 25 ms 4, 5, 6 20 25 25 ms For Notes to Specifications, refer to page 3 2 www.irf.com ASA28XXS Series Notes to Specifications 1. 2. 3. 4. 5. 6. 7. 8. 9. Parameter guaranteed and measured during line and load regulation tests. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. 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. An overload is that condition of load in excess of rated load 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 VOUT has returned to within ±1% of VOUT at 50% load. Input step transition time between 2µs and 10µs. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 2) while power is applied to the input. Block Diagram 1 6 +Output +Input Output Return 2 Error Amplifier Input Return Case 7 8 Inhibit Controller 5 Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number www.irf.com IR Standard Part Number 5962-94629 ASA2805S 5962-94630 5962-94631 ASA2815S ASA2812S 3 ASA28XXS Series Mechanical Outline 1.075 0.800 1 2 3 0.270 4 5 0.800 ±.005 1.075 8 7 6 0.025 ± .003 Dia Pins 0.220 Pin Designation 4 Pin # Designation 1 + Output 2 Output Return 3 NC 4 NC 5 Inhibit 6 + Input 7 Input Return 8 Case Ground www.irf.com ASA28XXS 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 Internal Visual 2017 Yes Yes Yes Temperature Cycle 1010 N/A Cond B Cond C Cond C Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs PIND 2020 N/A N/A N/A N/A Non-Destructive Bond Pull Burn-In 1015 N/A 48 hrs@hi temp Final Electrical MIL-PRF-38534 25°C 25°C ( Group A ) & Specification 160 hrs@125°C 160 hrs@125°C -55°C, +25°C, -55°C, +25°C, +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 S /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 S = Single 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