A Modular, High-Efficiency, Radiation-Hardened, DC-DC Converter with Decentralized Control

Future power systems in space and on the moon and Mars will need to operate with unprecedented requirements on efficiency, density, and voltage, which will require sophisticated control that is not achievable by todays radiation-hardened integrated circuit technology. In this SBIR Phase IIe, we will accelerate the productization of a rad-hard power controller IC with low power consumption and small die area that has PWM control, phase-shift control, extensive programmability, and built-in gate drivers and protection features allowing it to meet the stringent requirements of deep space applications and to operate reliably over an extended period of time. In the Phase II project we have developed power modules with a nonlinear power-sharing control algorithm that can be arranged in series or parallel, uniquely enabled by the controller IC. In the Phase IIe project we will demonstrate the new, commercially viable version of the IC in new, packaged versions of the modules. The power modules, arranged in series, permit power systems that operate at voltages that exceed the limits of existing radiation-hardened power device technology (~300 V), which will be necessary for future bases on the moon and Mars which are targeting transmission voltages over 1kV. This unique capability, along with improvements in efficiency, density, control bandwidth, protection, etc. are all enabled by the proposed controller IC.
Benefits: Power distribution and conversion solutions for lunar and Mars bases with knock-on applications for space station power, satellites, rovers, drones, and probes. Commercial GEO satellite applications. Lunar bases proposed by commercial companies such as SpaceX. Rad-hard ICs are needed in high-energy physics experiments, nuclear power applications, and medical imaging.