PD - 94540 ASA28XXD SERIES 28V Input, Dual Output ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS 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 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-704 input requirements offering full performance over a 16 to 40 volt input range. Output Power of up to 5 watts 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 ±0.5 volts. These converters are manufactured in a facility fully qualified to MIL-PRF-38534. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Three standard temperature grades are offered with the screening options. Refer to Part Number section. The CH grade converters are fully compliant to MILPRF-38534 for class H. The HB grade converters are processed with the same screening as the CH grade, but do not have class H element evaluation as required by MIL-PRF-38534. These two grades are fully tested and operate over the full military temperature range without derating of output power. A commercial grade is also available. Variations in electrical, mechanical and screening can be accommodated. Extensive computer simulation using complex modeling enables rapid www.irf.com ASA Features n n n n n n n n n n n Up To 5 Watt Output Power ±5, ±12, ±15 Volts Outputs High Reliability Wide Input Voltage Range -16 To 40 Volts 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 design modification to be provided. Contact Advanced Analog with specific requirements. 1 09/12/02 ASA28XXD Series Specifications ABSOLUTE MAXIMUM RATINGS Input Voltage Power Output Soldering Temperature Range -0.5 V to 50 V Continuous. 80 V, 100 mSec Internally limited (6.5 W typical) 300°C for 10 Sec. Operating -55°C to +125°C Case Storage -65°C to +150°C ASA2805D/XX ASA2812D/XX ASA2815D/XX Group A Subgroups 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 Conditions -55° ≤ TC ≤+125°C VIN = 28V dc ±5% CL = 0 unless otherwise specified TEST Output voltage Output current IOUT = 0 1, 2 3, 4 Output ripple voltage Line regulation 4 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 IOUT = IMAX IOUT = 50% ó 100% IMAX Output response to step transient load changes 4, 9 IOUT = 50% ó 100% IMAX 4, 9, 10 IOUT = 0 ó 50% IMAX step line changes 4, 7, 11 Recovery time transient step line changes 4, 7, 10, 11 Turn on overshoot Turn on delay 4 4, 12 Load fault recovery 4, 5, 6 IOUT = 0 ó 50% IMAX Recovery time, step transient load changes Output response transient 4, 5, 6 mA PP % MΩ 200 200 µf 4.0 4.0 4.0 W 2.0 2.0 2.0 500 600 500 600 500 600 -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 ó 40Vdc,IOUT= IMAX 4, 5, 6 VIN = 16 ó 40Vdc, IOUT= IMAX 4, 5, 6 1200 IOUT = 0 and IMAX 4, 5, 6 IOUT = 0 and IMAX 7 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 percent of full power is available from either output provided the total output does not exceed 5 W. Bandwidth of DC to 20 MHz is guaranteed by design. Tested for 20 KHz to 2 MHz. Load current split equally between +VOUT and -VOUT. 1.0 watt load on output under test, 1.0 to 4.0 watt 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 2 and 10 microseconds. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. Input step transition time between 2 and 10 microseconds. 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. Available Screening Levels and Process Variations for ASA28XXD Series Requirement MIL-STD-883 Method Temperature Range No Suffix ES Suffix HB Suffix CH Suffix -20°C to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C Element Evaluation MIL-PRF-38534 ü ü ü 1010 Cond B Cond C Cond C Constant Acceleration 2001, 500g Cond A Cond A Burn-in 1015 48hrs @ 125°C 160hrs @ 125°C 160hrs @ 125°C Internal Visual 2017 Temperature Cycle Final Electrical (Group A) ¬ 48hrs @ 85°C MIL-PRF-38534 25°C 25°C -55, +25, +125°C -55, +25, +125°C Seal, Fine & Gross 1014 Cond C Cond A, C Cond A, C Cond A, C External Visual 2009 ¬ ü ü ü * per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference ASA2812D/CH 5962-9564801 ASA2815D/CH 5962-9464901 Part Numbering ASA 28 05 D / CH Model Input Voltage Screening – , ES, HB, CH 28 = 28V Output Voltage 5 = ±5, 12 = ±12, 15 = ±15 www.irf.com Outputs S = Single D = Dual 3 ASA28XXD Series ASA28XXD Block Diagram +Output 1 6 +Input Return 2 -Output 3 Error Amplifier Return Case 7 8 Enable Controller 5 ASA28XXD Case Outline Pin No. 1.075 0.800 1 2 3 0.270 4 7 6 0.025 ± .003 Dia Pins Designation 1 Positive Output 2 Output Return 3 Negative Output 4 N/C 5 Enable 6 Positive Input 7 Input Return 8 Case 5 1.075 8 ASA28XXD Pin Designation 0.800 ±.005 0.220 WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 ADVANCED ANALOG: 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. 09/02 4 www.irf.com