DC electric motors have been around for nearly two hundred years, with a steady series of refinements in that time. More recently, brushless DC motors have become increasingly popular but for many applications brushed DC motors are still the right choice.
Automotive OEMs are migrating to BLDCs in order to maximize efficiency and reliability. This article looks at the important parameters engineers should consider during the design process, in order to meet these objectives.
The multiple power rails of today’s FPGAs and high-performance processors must be powered up and powered down in strict sequence. The decoupling capacitors normally attached to the power rails must be actively discharged, to ensure proper control of the power-down sequence and to complete power-down in an acceptable time. This article describes the principles and design of active discharge circuitry, and explains selection criteria for key components such as power MOSFETs to ensure repeatable performance and reliability.
Self-Protecting MOSFETs Deliver Improved Reliability in the Harsh Environment of Automotive Applications
While it’s been said many times before, the automotive electrical environment is tough! As demonstrated in figure 1, the nominal battery voltage of an automobile can vary from -12V DC, under reverse battery condition, to +125V DC due to load transients and inductive field decay. Factor in wide variations in operating temperature, numerous interconnections and an open environment that is subject to possible ESD damage from human interactions, and you have an operating environment that is far more challenging than, for example, that of the consumer market segment.