This five-part series provides an overview of DC-DC converters.
This five-part series provides an overview of linear regulators.
These training videos will be used to better understand LDOs, and includes more information on designing the best ADC power supply, stabilizing an LDO, measuring LDO noise and power supply rejection ratio, sourcing 5-A or more with current sharing regulators, measuring thermal resistance between junction temperature and ambiance, and measuring the ADC power supply rejection.
For noise-critical portable applications, such as GPS receivers, connectivity, and sensing, power supply designers always had to choose between longer battery run time (from higher efficiency) or higher signal chain performance (from the increased sensor sensitivity possible with a quieter power supply). For line-powered industrial or communications equipment applications, designers have been forced to dissipate significant amounts of power in LDOs to achieve the desired noise performance. Achieving both low noise and high efficiency was impossible.
These training videos will be used to better understand LDOs, and include information on designing the best ADC power supply, stabilizing an LDO, measuring LDO noise and power supply rejection ratio, measuring thermal resistance between junction temperature and ambiance, and more.
For anti-tampering, it is common to try to detect the presence of a strong magnet. In this section, we will cover the use of hall sensors for low-power detection of strong magnetic fields in three dimensions. Details on our magnetic tamper detection reference design, TIDA-00839, will be provided as well as some of the design considerations that were kept in mind when creating this reference design.
In this section, we will cover how to harden a meter against these magnetic tamper attacks by using shunts for current sensors. For poly-phase implementations, I will go over how to use isolated delta sigma modulators to add the necessary isolation to use shunt current sensors and create magnetically immune poly-phase energy measurement systems. The TIDA-00601 and TIDA-01094 reference designs, which show how to implement a poly-phase isolated shunt measurement system, will be discussed as well as the associated AMC1304 high-side power supplies used in these designs.