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ASA2805S Dataheets PDF



Part Number ASA2805S
Manufacturers IRF
Logo IRF
Description HYBRID-HIGH RELIABILITY DC/DC CONVERTER
Datasheet ASA2805S DatasheetASA2805S Datasheet (PDF)

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 of.

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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. 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 www.irf.com 1 01/11/07 http://www.Datasheet4U.com ASA28XXS Series Specifications Absolute Maximum Ratings Input voltage Power output Soldering temperature Operating case temperature Storage case temperature Conditions -55° ≤ TC ≤ +125°C VIN = 28V dc ±5% C L = 0 unless otherwise specified IOUT = 0 1 2 -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 ASA2805S/xx Group A Subgroups 1 2, 3 Min 4.95 4.90 Max 5.05 5.10 1000 190 475 25 50 25 50 18 50 100 66 100 500 4.0 2.0 4, 5, 6 4 5, 6 0 mA IMAX 4 5, 6 500 -300 -450 -500 -750 600 +300 +450 +500 +700 200 4, 5, 6 40 V dc 4, 5, 6 1.0 500 500 -450 -750 71 68 100 200 4.0 2.0 600 +450 +750 100 1.0 1000 500 -400 -800 ASA2812S/xx Min 11.88 11.76 Max 12.12 12.24 417 200 290 ±25 ±50 ±25 ±50 18 50 100 71 68 100 200 4.0 2.0 600 +450 mV pk +750 100 1.0 1000 µs ms mV pk KHz ASA2815S/xx Min 14.85 14.70 Max 15.15 15.30 333 200 290 ±25 ±50 ±25 ±50 18 50 100 mA mA PP % MΩ µF W mV mV mA mV PP Unit V TEST Output voltage Output current VIN = 16, 28, and 40 V dc 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 1, 2, 3 1 2, 3 Output ripple voltage Line regulation 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= +25°C No effect on dc performance, Tc = +25°C Overload IOUT = IMAX ½ IMAX IMAX 5 1 4 1, 2, 3 Power dissipation, load fault Switching frequency 4 Short circuit Output response to step 6 transient load changes Recovery time, step transient load changes Output response transient step line 4 8 changes Recovery time transient 4, 7, 8 step line changes Turn on overshoot Turn on delay 9 4 IOUT = IMAX 0 mA ½ IMAX Input step 16 IOUT = IMAX Input step 16 IOUT = IMAX IOUT = 0 mA, IMAX IOUT = 0 or IMAX 40 V dc 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 800 600 20 20 800 600 25 25 800 600 25 25 µs mV pk ms ms Load fault recovery For Notes to Specifications, refer to page 3 2 www.irf.com http://www.Datasheet4U.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 2µ s and 10µs. Recovery time is measured from the .


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