AHE28XXD

The AHE 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-704D input requirements, these AHE Series  have nominal 28VDC inputs with +12V and +15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated pushpull topology operating in the feed-forward mode at a nominal switching frequency of 250KHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits.

The advanced feedback design of AHE Series  provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical feedback circuits.

Manufactured in a facility fully qualified to MIL-PRF- 38534, these AHE Series  converters are available in four screening grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MILPRF- 38534 for class H. The HB grade is processed and screened to the class H requirement, but may not be necessarily meet all of the other MIL-PRF-38534 requirements, e.g., element evaluation and Periodic Inspection (P.I.) are 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 more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements.