Abstract:
The power module for miniature Inertial Navigation System demanded reduction in volume and footprint and it had to be housed inside the miniature INS package. Three such power modules are required for powering the three electrical chains of miniature INS. Also as demanded by the improved sensor electronics, the peak output power was increased from 57 W to 65 W. The reduction in volume and increase in power demanded power density enhancement of around three times from the existing system. The objective of the paper is to design a dc - dc converter satisfying the required specifications for an input voltage range of 22-36 V and providing multiple outputs +5V, +/-15 V, +/-30V and + 28Vwith a targeted efficiency of >80%. Also grouping the outputs to sets into HMCs was also attempted. The paper discusses various steps right from the topology selection to the design of the components. Design validation using SABER software is also done.

Keywords: Miniaturization, power density improvement, magnetic, Hybrid Micro Circuit (HMC), Low Drop out Regulator (LDO)