Super capacitor discharge time calculator. This calculator determines timekeeping operation using a supercapacitor (ultracap) based upon starting and ending capacitor voltages, discharge current, and capacitor size. Formulas used: Bt(seconds) =…
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Multilayer air core inductor design calculator
The formula used in this calculation is from the famous Wheelers approximations which is accurate to <1% if the cross section is near square shaped. L (uH) =31.6*N^2* r1^2 /…
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Single layer air core inductor design calculator
Winding the wire in a single layer produces an inductor with minimal parasitic capacitance, and hence gives the highest possible self-resonant frequency (SRF). Striving to obtain a high SRF and…
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Flat spiral air core inductor design calculator
This is an popular coil geometri used in todays wireless charger circuits. The formula used in this calculation is based on the Harold A. Wheeler approximations for air core flat…
Read MorePlanar spiral coil inductor design
The first approximation is based on a modification of an expression developed by Wheeler; the second is derived from electromagnetic principles by approximating the sides of the spirals as current-sheets;…
Read MorePower supply design Tips from EE-Times
With the emphasis today on the need for more efficient and cost-effective power solutions, EE-Times created this column to provide helpful tips on a variety of power management topics. This…
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Electronics design checklist
This page is an Electronics Design Checklist. It was originally obtained from a HP document. It has been extensively adapted to suit my and hopefully other design engineers requirements. Copy…
Read MoreTexas Instruments (Unitrode) Switching power supply design.
Texas Instruments (formerly Unitrode) seminars are part of TI analog technical training during which they also update on their new controllers and other power management integrated circuits. They combine tutorial…
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