Questions tagged [planar-inductor]

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Understanding the thermal images of planar pcb coils

Why is only the first turn in the coil hotter compared to other two turns? In this, only the turns of the top part seem to be hotter compared to the bottom. Current through the coils is 2 A. It is ...
1
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1answer
94 views

How to design planar toroidal inductors using Altium designer?

Prior to this, I did spiral inductors which was relatively easy. But I am now stuck in designing toroidal inductors. I know the distance between each turns but having trouble placing them in ...
14
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3answers
2k views

LM2586 - Inductor Heats Then Burns

I'm designing a step-up constant current source to drive LED strips (nominal load voltage is about 54 VDC). Requirements: Vin: 18..32 VDC Iout = 0.2 A Vout = 54 VDC (nominal) - 57 VDC (maximum) ...
1
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1answer
176 views

Virtuoso Monte Carlo Inductor Problem

For an LNA design, the simulations for the inductors and the simulation for the rest of the components (transistors, capacitors, resistors etc.) are done in two different software packages. The ...
3
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1answer
3k views

Making planar transformers in Altium

Does anyone know of a decent (repeatable) way of making planar transformers/planar inductors in Altium? And if so, how was the experience? Drawing out the tracks and checking trace/space clearance ...
7
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2answers
2k views

PCB coil designs

In researching how to design a planar rectangular PCB coil, I've come across numerous papers describing many topologies, except for a rectangular one. Square, hexagonal, circular are common ones, but ...
0
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1answer
428 views

Q-factor Inductor

The Q factor of an inductor is given by: Q=(2*pifL)/R Is this only the frequency dependent Rf? Or does it also include the series DC resistance?
12
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2answers
892 views

Why am I getting odd inductances from home made inductor?

This question is related my my previous question: What to do about very hot planar inductor? What I'm trying to do I am trying to make a planar inductor (made from the tracks of the PCB, and ...