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Worst-case error analysis and calibration in temperature sensing systems using NTC and PTC thermistors

October 22, 2019 By Aimee Kalnoskas Leave a Comment

NTC and PTC thermistors

by Hadi Ebrahimi-Darkhaneh, Texas Instruments For applications that employ temperature monitoring systems, measurement accuracy is a prime concern. Temperature sensors are affected by a variety of factors, including environmental conditions, manufacturing process variations, poor assembly, and nonideal biasing components. External components connected to temperature sensors (such as the power supply, an analog-to-digital converter [ADC] and […]

Filed Under: Featured, Power Components, thermistors Tagged With: texasinstrumentsinc

Error analysis in temperature sensing with NTC and silicon-based PTC thermistors: Comparing the Ratiometric and Absolute methods

October 16, 2019 By Aimee Kalnoskas Leave a Comment

thermistors

by Hadi Ebrahimi-Darkhaneh, Texas Instruments A thermistor is a resistive device specifically designed to vary resistance with thermal change, and therefore follows Ohm’s law. According to Ohm’s law, a current passing through a resistive component will produce a voltage drop across that component. This voltage is proportional to the magnitude of the component resistance and […]

Filed Under: FAQ, Featured, Power Components, thermistors Tagged With: texasinstrumentsinc

Charging electric vehicles, Part 1: The numbers

June 17, 2019 By Bill Schweber 2 Comments

Charging electric vehicles

It’s nice to envision that recharging an electric vehicle is as straightforward as filling up an internal combustion vehicle, but it’s not: there are multiple charging, power, and connector options as well as limitations. You’re driving your internal-combustion (IC) car, and the gauge indicates it’s time to get “gas” (of course, it’s actually gasoline). So […]

Filed Under: batteries, FAQ, Featured Tagged With: FAQ, texasinstrumentsinc

GaN power devices, Part 1: Principles

May 23, 2019 By Bill Schweber Leave a Comment

GaN power devices

Power devices based on gallium nitride (GaN) are rapidly becoming a viable, higher-performance alternative to silicon MOSFETs due to their higher efficiency and other favorable attributes. In recent years, discrete power-switching and power-handling devices based on gallium nitride (GaN) material have become practical and available, and these devices are now found in many power supplies […]

Filed Under: FAQ, Featured, Transistors Tagged With: basics, FAQ, gansystemsinc, texasinstrumentsinc

Flyback power converters, Part 2: Enhancements and ICs

April 22, 2019 By Bill Schweber 2 Comments

Power supplies and converters tend to be simple in principle, yet their actual design – including overcoming the subtle issues which degrade and impede their performance –  is the real challenge. In Part 1, we looked at the flyback design and some distinct advantages along with unique idiosyncrasies. This FAQ looks at some of these […]

Filed Under: Converters, FAQ, Featured Tagged With: FAQ, maximintegratedproductsinc, texasinstrumentsinc

Flyback power converters, Part 1: Basic principles

April 15, 2019 By Bill Schweber 1 Comment

Among the many available topologies used for power-supply converters, the flyback design offers some distinct advantages along with unique idiosyncrasies. There’s a wide and diverse array of power-supply converter topologies among which to choose, each with tradeoffs in their various performance attributes and cost. The flyback design is a converter approach which has been used […]

Filed Under: Converters, FAQ, Featured Tagged With: analogdevicesinc, FAQ, maximintegratedproductsinc, texasinstrumentsinc

Working with higher voltages, Part 1: Voltage boosters

March 14, 2019 By Bill Schweber Leave a Comment

voltage boosters

Whether for efficiency or due to the device physics, many applications require voltages ranging in the tens, hundreds, or even thousands of volts; the circuits which produce these voltages start with basic charge pumps and extend to voltage multipliers with simple schematics but many subtleties. Lower-voltage circuitry is the trend, with ICs and designs operating […]

Filed Under: Capacitors, FAQ, Featured, Transformers Tagged With: analogdevicesinc, basics, FAQ, texasinstrumentsinc

Motor field-oriented control, Part 1: Principles

January 16, 2019 By Bill Schweber Leave a Comment

field-oriented control

Field-oriented control, also known as vector control, is a calculation-intensive algorithm for motor control which is now practical due to advances in ICs; it offers improved efficiency along with superior control of torque and other performance parameters. Motor control—and doing so accurately and efficiently—is a topic of great interest. Field-oriented control (FOC), sometimes called vector […]

Filed Under: FAQ, Featured, Motors and motor control Tagged With: basics, FAQ, texasinstrumentsinc, trinamicmotioncontrol

Power management ICs, part 1: PMIC functions

November 22, 2018 By Bill Schweber 1 Comment

The power management IC (PMIC) is often a vital part of the lower-voltage DC subsystem, as circuits have multiple power rails with tight individual specifications as well as mandated relationships among them. It’s one thing to develop needed low-voltage DC rails via DC/DC converters or regulators, but there’s also a need to manage these power […]

Filed Under: FAQ, Featured, Power Management Tagged With: analogdevicesinc, basics, FAQ, texasinstrumentsinc

Optimizing the energy efficiency of converters and controllers

November 20, 2018 By Lee Teschler Leave a Comment

Here’s how to evaluate energy efficiency associated with components that make up widely used power conversion circuitry. FRANK DE STASI, MATHEW JACOB, TEXAS INSTRUMENTS INC. IN SOME WAYS, selecting a module, converter or controller for power conversion resembles deciding whether to take a flight, board a train, or drive from point A to B. Once […]

Filed Under: Controllers, FAQ, Featured, MOSFETS, Regulators Tagged With: FAQ, texasinstrumentsinc

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