alec

Alec

Applications Engineer

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Discussions Comment: Hard to find Components, Custom Fabrication

October 24, 2011

Hi David,

To me they look like something that’s maybe been ripped out of NEMA power cords. I’m not sure where you could purchase such a thing off the shelf without it already being molded into a cable assembly.

Could you explain what you would like to use them for?

Do you know what sort of…

Discussions Comment: How to calculate the maximum current that flow to through cable?

October 21, 2011

Siraj,

This link may give you the information you are looking for.

Discussions Comment: Motor Connection and Diodes

October 18, 2011

Yosef,

I think you are asking for a means of reverse supply connection protection for a 6V motor running at 2A. I assume you just don’t want the motor to run backward if the supply is hooked up backward.

Which of the following are you trying to accomplish:

1) Have the motor run in the same…

Discussions Comment: PWM control based Half-Bridge Boost Circuit Design with Power Mosfet

October 11, 2011

Here is some useful information from the International Rectifier website page for the IRF2110. The attached pictures are of the demo board schematic and bill of materials they provide.

You mentioned 400V (which…

Discussions Comment: PWM control based Half-Bridge Boost Circuit Design with Power Mosfet

October 11, 2011

Sunay,

Where did you find the schematic you posted, could you post a link? Or is it something you created yourself?

What is your load for the boosted PWM? what are you trying to use it for exactly?

There are a few things that seem very odd to me, unless I’m severely misinterpreting the way the…

Discussions Comment: Controlling LEDs

September 20, 2011

Brian,

A microcontroller like a PIC could certainly be used for something like this. However, if you are trying to directly drive each LED individually from an equal number of GPIO pins and you have 20 of them you may exceed the total amount of current you can sink/source from the micro if too…

Discussions Comment: bootstrap gate drive circuit layout

September 13, 2011

I was speaking about the gate driver inputs likely being high impedance, not the output pins of the MCU.

I was basically just saying that most likely the boostrap IC doesn’t demand a lot of input current from the MCU, but that the gates of the FETs probably do (depending on gate charge, frequency,…

Discussions Comment: bootstrap gate drive circuit layout

September 13, 2011

Yes, keep the gate driver (bootstrap) IC outputs close to the FETs being driven.

The gate driver outputs are likely low output impedance, high current, high slew rate lines while the gate driver inputs from the MCU are likely just high input impedance, low current, signal lines. Transmission line…

Discussions Comment: PIC contactor, relay and inductive load

September 13, 2011

I suppose that a direct link would be even more convenient for you. :)

Discussions Comment: PIC contactor, relay and inductive load

September 13, 2011

Hi Max,

I’m not a relay expert either, but you used the word “contactor” in your description and I believe that is a type of relay specifically made to switch inductive loads (maybe you knew that and that’s why you said it).

I don’t know if this helps or not, but the Digi-Key search lets you…

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