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| PD - 94539 ASA28XXS SERIES ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS 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 16 to 40 volt input range. Output Power of up to 5 watts 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 400A. 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 thereby enabling Advanced Analog to deliver fully compliant devices. Three standard temperature grades are offered with the screening options. Refer to Screening Level section. The CH grade converters are fully compliant to MIL-PRF-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 requirements can be accommodated. Extensive computer simulation using 28V Input, Single Output ASA Features n n n n n n n n n n n n Up To 5 Watt Output Power 5, 12,15 Volt Outputs High Reliability Wide Input Voltage Range -16 To 40 Volts 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 complex modeling allows design modifications to be examined. Contact Advanced Analog with specific requirements. www.irf.com 1 09/11/02 ASA28XXS 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) 300C for 10 Sec. Operating -55C to +125C Case Storage -65C to +150C ASA2805S/xx Group A Subgroups 1 2, 3 Output current 1 TEST Output voltage Conditions -55 TC +125C VIN = 28V dc 5% CL = 0 unless otherwise specified IOUT = 0 VIN = 16, 28, and 40 V dc 2 ASA2812S/xx Min 11.88 11.76 Max 12.12 12.24 417 200 290 25 50 25 50 18 50 100 71 68 ASA2815S/xx Min 14.85 14.70 Max 15.15 15.30 333 200 290 25 50 25 50 18 50 100 71 68 100 M mA PP % mA mV mV mA mV PP Unit V Min 4.95 4.90 Max 5.05 5.10 1000 190 475 25 50 25 50 18 50 1, 2, 3 1 2, 3 Output ripple voltage Line regulation VIN = 16, 28 and 40 V dc VIN = 16, 28, and 40 V dc IOUT = 0, 50%, 100% IMAX VIN = 16, 28, and 40 V dc IOUT = 0, 50%, 100% IMAX IOUT = 0 Pin 5 to Pin 7 1 2, 3 1 2, 3 1, 2, 3 1, 2, 3 1 2, 3 66 100 Load regulation Input current Input ripple current Efficiency Isolation - Input to output or any pin to case Capacitive load 3, 4 2 IOUT = 0 Pin5 open IOUT = IMAX IOUT = IMAX VTEST 500 Vdc, Tc= +25C 100 1 100 No effect on dc performance, Tc = +25C Overload IOUT = IMAX 1/2 IMAX o IMAX 0 mA o IMAX 5 4 1, 2, 3 4, 5, 6 4 5, 6 4 5, 6 500 -300 -450 -500 -750 500 4.0 2.0 600 +300 +450 +500 +700 200 -750 500 -450 200 4.0 2.0 600 +450 500 -400 200 4.0 2.0 600 +450 f W KHz Power dissipation, load fault Switching frequency 4 Short circuit Output response to step transient load changes 6 mV pk +750 100 1 1000 -800 +750 100 1 1000 S ms mV pk Recovery time, step transient load changes Output response transient step line 48 changes Recovery time transient 4, 7, 8 step line changes Turn on overshoot Turn on delay 9 IOUT = IMAX 0 mA o 1/2 IMAX Input step 16 o 40 V dc IOUT = IMAX Input step 16 o 40 V dc IOUT = IMAX IOUT = 0 mA, IMAX IOUT = 0 or IMAX 4, 5, 6 4, 5, 6 1 500 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 800 600 20 20 800 600 25 25 800 600 25 25 S mV pk ms ms Load fault recovery 4 For Notes to Specifications, refer to page 3 2 www.irf.com ASA28XXS Series Notes to Specifications 1. 2. 3. Parameter guaranteed and measured during line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. 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 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 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. 4. 5. 6. 7. 8. 9. Available Screening Levels and Process Variations for ASA28XXS Series MIL-STD-883 Method No Suffix -20C to +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010 2001, 1015 MIL-PRF-38534 1014 2009 48hrs @ 85C 25C Cond C u Cond B 500g 48hrs @ 125C 25C Cond A, C u u Cond C Cond A 160hrs @ 125C -55, +25, +125C Cond A, C u u Cond C Cond A 160hrs @ 125C -55, +25, +125C Cond A, C u Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual * per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference ASA2805S/CH ASA2812S/CH ASA2815S/CH 5962-9462901 5962-9463101 5962-9463001 Part Numbering ASA 28 05 S / CH Model Input Voltage 28 = 28V Screening - , ES, HB, CH Output Voltage 5 = 5, 12 = 12, 15 = 15 Outputs S = Single D = Dual www.irf.com 3 ASA28XXS Series ASA28XXS Block Diagram 6 +Input 1 +Output Return 2 Return 7 Enable 5 Error Amplifier Case 8 Controller ASA28XXS Case Outline 1.075 0.800 0.270 ASA28XXS Pin Designation Pin No. 1 2 3 Designation Positive Output Output Return N/C N/C Enable Positive Input Input Return Case 1 2 3 4 5 4 1.075 0.800 .005 5 6 8 7 6 7 8 0.025 .003 Dia Pins 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 |
Price & Availability of ASA28XXS
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