ATW28XXD

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.

The ATW28XXD 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.Three standard temperature grades  are offered.  Refer to Part Number section for more  severe  environments.

ATW28XXD,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 ATW28XXD Advanced Analog for special requirements.