Fault Detection in a Hybrid Dickson DC–DC Converter for 48-V Automotive Applications

摘要: Autonomous driving features have introduced safety-critical processor modules. A 48-V network has been developed to enable efficient power distribution. fault-tolerant high-voltage management unit is required ensure continuous delivery critical loads. This article compares the cost and efficiency penalty of accommodating capability in common dc–dc topologies. The comparison verified using a 0.13-μm automotive Bipolar-CMOS-DMOS SMARTMOS technology Cadence simulation environment. Besides, quantitative reliability assessment single-phase multiphase configurations presented. led selection hybrid Dickson topology, which best electrical performance comparable among all for high-conversion-ratio application. Moreover, this presents fast robust short-circuit open-circuit fault detection scheme switches flying capacitors converter. method only observes low-voltage switching node, eliminates challenges associated with high-bandwidth sensing. design 48-V-to-3.3-V 4-to-1 converter prototype. measured results demonstrate that faults are detected within two cycles 250 kHz, less than 10-μs immunity commercial silicon devices.