ATO28XXT

Three standard temperature grades are offered. Refer to Part Number section.  ATO28XXT are provided in a stan-dard plug-in package for PC mounting or in a flanged package for more severe environments.

These converters ATO28XXT are manufactured in a facility fully qualified to MIL-STD-1772.  All processes used to manu-facture these converters have been qualified to enable Advanced Analog to deliver compliant devices.  Two screening grades are available to satisfy a wide range of requirements.  The CH grade converters are fully compliant to MIL-PRF-38534 for class H. The HB grade converters are processed to full class H screening re-quirements but do not have class H element evalua-tion as directed by MIL-PRF-39534.  Both grades are fully tested and operate over the full military tempera-ture range without derating of output power.  Variations in electrical, mechanical and screening can be accom-modated.  Extensive computer simulation using com-plex modeling enables modest design modifications to be accommodated.  Contact Advanced Analog with specific requirements.

The ATO28XXT Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications.  Designed to the nominal input requirements of MIL-STD-704D,these devices have nominal 28VDC inputs with +5V and ±12V or +5V and ±15V triple outputs to satisfy a wide range of requirements.  The circuit design incor-porates a pulse width modulated push-pull topology operating in the feed-forward mode at a nominal switch-ing frequency of 250KHz. Input to output isolation is achieved through the use of transformers in the for-ward and feedback circuits.

The ATO28XXT advanced feedback design provides fast loop re-sponse for superior line and load transient characteris-tics and offers greater reliability and radiation toler-ance than devices incorporating optical feedback cir-cuits.