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ATW28XXD Datasheet(PDF) 1 Page - International Rectifier |
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ATW28XXD Datasheet(HTML) 1 Page - International Rectifier |
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1 / 8 page  10/24/02 www.irf.com 1 ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS ATW28XXD SERIES Description n 18 to 40 VDC Input Range (28 VDC Nominal) n ±12V and ±15V Outputs Available n Indefinite Short Circuit and Overload Protection n 22.8 W/in 3 Power Density n 30 W Output Power n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from -55°C to +125°C Available n Popular Industry Standard Pin-Out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Efficiencies up to 85% n Shutdown from External Signal n Full Military Screening n 200,000 hour MTBF at 85°C Features ATW 28V Input, Dual Output The advanced feedback design provides fast loop re- sponse for superior line and load transient character- istics and offers greater reliability and radiation toler- ance than devices incorporating optical elements in the feedback circuits. Manufactured in a facility fully qualified to MIL-PRF- 38534, these converters are available in four screen- ing grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MIL- PRF-38534 for class H. The HB grade is processed and screened to the class H requirement, but may not necessarily meet all of the other MIL-PRF-38534 re- quirements, e.g., element evaluation and Periodic In- spection (PI) not required. Both grades are tested to meet the complete group “A” test specification over the full military temperature range without output power deration. Two grades with a more limited screening are also available for use in less demanding applica- tions. Variations in electrical, mechanical and screen- ing can be accommodated. Contact Advanced Analog for special requirements. n MIL-PRF-38534 Compliant Versions Available Three standard temperature grades are offered. Refer to Part Number section for more severe environments. The ATW28XXD Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to MIL-STD-704 input requirements, these devices op- erate with a nominal 28 VDC inputs with ±12V and ±15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modu- lated push-pull topology operating in the feed-forward mode at a nominal switching frequency of 270KHz. Input to output isolation is achieved through the use of trans- formers in the forward and feedback circuits. PD - 94557 |
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