Cap Dump Circuit

[Matthew Jones]

Yes, but the ic is not made to run the pnp gate.
I have been searching for an ic to run both pnp and npn gates but no luck.
The pnp gate has to have a neg bias and the npn gate has to be pos biased.

You need a FAN3278. Drive P channel Fet on the high side and an N channel Fet on the low side in a half bridge fashion. Read the DataSheet for an example.
Lots of Half bridge drivers will also control 2 N channels in high and low spots so no need for an expensive P channel fet. N channel Fets are more reliable.

Matt

[Dave45]

You need a FAN3278. Drive P channel Fet on the high side and an N channel Fet on the low side in a half bridge fashion. Read the DataSheet for an example.
Lots of Half bridge drivers will also control 2 N channels in high and low spots so no need for an expensive P channel fet. N channel Fets are more reliable.

Matt

Thank you Mr. Jones
What Im trying to do is combine the boost converter and the buck converter into one.
I found a chip that does this but I want to be able to change and experiment with different configurations.

Here's the boost buck chip
https://www.youtube.com/watch?v=MIYyGeLl128

Sorry Mike dont mean to derail your thread.

[BroMikey]

Circuit applications

Thank you Mr. Jones
What Im trying to do is combine the boost converter and the buck converter into one.
I found a chip that does this but I want to be able to change and experiment with different configurations.

Here's the boost buck chip
https://www.youtube.com/watch?v=MIYyGeLl128

Sorry Mike dont mean to derail your thread.

No need for all of that Dave

You are doing a great job in my book. This all applies.


Mike

[Dave45]

Cool site Mike

[Shanjaq]

There are a couple of designs for level shifters, but they all boil down to using the high Vceo parameter of BJTs to reach across to the other rail and manipulate things relative to each.

For example:
Level Shifter 1

or

http://www.electro-tech-online.com/a...806-gif.39323/

[BroMikey]

Explain further

There are a couple of designs for level shifters, but they all boil down to using the high Vceo parameter of BJTs to reach across to the other rail and manipulate things relative to each.

For example:
Level Shifter 1

or

http://www.electro-tech-online.com/a...806-gif.39323/

I do not understand.

Mike

[BroMikey]

A Few More Diagrams

Cool site Mike

Thanks Dave

Here are a few more 555 timer applications.

BroMikey's Science Projects

These applications to drive NP and PNP do not use any dead time it just switches at the same time. One is "ON" and the other is "OFF"

Mike

[Shanjaq]

tried to edit this in but the forums didn't want to cooperate: The idea here is to jam the switch between its high and low impedance state as fast as possible so it isn't dissipating too much power through the drain-source junction, which would vaporize in short order given the case of a purely capacitive load. If you have multiple power supplies you can communicate control signals between them using a level shifter in a similar fashion to how opto-isolators are used, but response times are much faster.

[BroMikey]

Yes I understand

tried to edit this in but the forums didn't want to cooperate: The idea here is to jam the switch between its high and low impedance state as fast as possible so it isn't dissipating too much power through the drain-source junction, which would vaporize in short order given the case of a purely capacitive load. If you have multiple power supplies you can communicate control signals between them using a level shifter in a similar fashion to how opto-isolators are used, but response times are much faster.

Okay I understand this idea. Can you give more shift level examples that are good circuits???

What shift level chip are you talking about in your work?

Thank you for your important idea.

Mike

[Matthew Jones]

Thank you Mr. Jones
What Im trying to do is combine the boost converter and the buck converter into one.
I found a chip that does this but I want to be able to change and experiment with different configurations.

Here's the boost buck chip
https://www.youtube.com/watch?v=MIYyGeLl128

Sorry Mike dont mean to derail your thread.

You only need 4 N channels for that controller because it uses a high side and low side driver. Why though are you wanting to blend both a buck and boost. Does your input have that much variation?

No need for all of that Dave
You are doing a great job in my book. This all applies.
Here is Matt Jones suggestion on my website
BroMikey's Science Projects
1.5 amp is small for my fets but we could look around for higher output chips.
@Matt
Pretty Kool suggestion
Mike

1.5 amp is the power to the gate.

Matt

[Dave45]

You only need 4 N channels for that controller because it uses a high side and low side driver. Why though are you wanting to blend both a buck and boost. Does your input have that much variation?

The simple things catch my eye, like why does a pos pulsed coil give a neg return like the buck converter.
And why does a neg pulsed coil give a pos return like the boost converter.

No matter what we do we are pulling from the battery, we have to have a source be it radioactive material or another form of energy.

The aether - a big misunderstanding
The earth is negative
The ionosphere is pos
Between neutral
So where is the aether
When lightning exchanges charges between the pos an neg an ion channel creates the path that allows charges to flow.
In a bipolar ionization circuit neg ion clouds form around the pos electrode and pos ion clouds form around the neg electrode.
Now I know ions are not electrons or positrons but as we can see in the lightning example they allow energy to flow so it would make sense to put the neg pulsed coil of a boost converter in a pos ion cloud and the pos pulsed coil of a buck converter in a neg ion cloud, we just might find our source without using radioactive isotopes and we might just discover this elusive aether that everyone talks about.

If we take a look at how static eliminators work the pos and neg electrodes are brought close together and close to the work surface that needs neutralized the ions pos and neg join together and become neutral particles-- sounds like that neutral layer between the earth and ionosphere doesnt it

Static eliminators give us an indication of something we dont want, if the two coils of the buck boost converter are wound on the same core any ionization that occurs will be eliminated because of the close proximity.
The two cores and their electrodes should be separated.

The electrodes should blunt with no sharp points or edges we want to pull charges from the atmosphere not emit charges from our circuit.

The ionization circuit and collecting circuits can be separate circuits running at different frequencies.

[BroMikey]

6amps Driver

You only need 4 N channels for that controller because it uses a high side and low side driver. Why though are you wanting to blend both a buck and boost. Does your input have that much variation?



1.5 amp is the power to the gate.

Matt

Yes thank you Matthew Jones

How about this chip? It has a good high voltage ceiling or the same as my MOSFETS IRFP460's at 500volts????

This stuff is being uploaded to my site here it is.

BroMikey's Science Projects

Will this IX611 chip work??? It is a half bridge?? About any half bridge will work? Isn't that what you said Matt???

Or am I looking for something more specific????

I am compiling information on my webpage.

NOTE:
I have been pulsing on three 460 fets about 2 weeks at 12vdc. Those big batteries in the basement both got charged and I have used the power off of them at night.

Today I switched back to 24vdc (Both banks) and began charging and in one hour one of the fets popped.

Three devices is just not enough and I am thinking 4 X 3 devices so I will solder them all into their places this time instead of running on 1/4 impulse power Scotty.

Mike

[BroMikey]

Goodness Me

The simple things catch my eye, like why does a pos pulsed coil give a neg return like the buck converter.
And why does a neg pulsed coil give a pos return like the boost converter.

No matter what we do we are pulling from the battery, we have to have a source be it radioactive material or another form of energy.

The aether - a big misunderstanding
The earth is negative
The ionosphere is pos
Between neutral
So where is the aether
When lightning exchanges charges between the pos an neg an ion channel creates the path that allows charges to flow.
In a bipolar ionization circuit neg ion clouds form around the pos electrode and pos ion clouds form around the neg electrode.
Now I know ions are not electrons or positrons but as we can see in the lightning example they allow energy to flow so it would make sense to put the neg pulsed coil of a boost converter in a pos ion cloud and the pos pulsed coil of a buck converter in a neg ion cloud, we just might find our source without using radioactive isotopes and we might just discover this elusive aether that everyone talks about.

If we take a look at how static eliminators work the pos and neg electrodes are brought close together and close to the work surface that needs neutralized the ions pos and neg join together and become neutral particles-- sounds like that neutral layer between the earth and ionosphere doesnt it

Static eliminators give us an indication of something we dont want, if the two coils of the buck boost converter are wound on the same core any ionization that occurs will be eliminated because of the close proximity.
The two cores and their electrodes should be separated.

The electrodes should blunt with no sharp points or edges we want to pull charges from the atmosphere not emit charges from our circuit.

The ionization circuit and collecting circuits can be separate circuits running at different frequencies.

@Dave

When you talk like that it gives me ideas. Very good to hear something other than kill the dipole as Tom B. always says.

That boost circuit sounds like it could evolve into more than just a send/receiver going down hill, rather possibly a magnifier.

Mike

[Matthew Jones]

Yes thank you Matthew Jones

How about this chip? It has a good high voltage ceiling or the same as my MOSFETS IRFP460's at 500volts????

This stuff is being uploaded to my site here it is.

BroMikey's Science Projects

Will this IX611 chip work??? It is a half bridge?? About any half bridge will work? Isn't that what you said Matt???

Or am I looking for something more specific????

I am compiling information on my webpage.

NOTE:
I have been pulsing on three 460 fets about 2 weeks at 12vdc. Those big batteries in the basement both got charged and I have used the power off of them at night.

Today I switched back to 24vdc (Both banks) and began charging and in one hour one of the fets popped.

Three devices is just not enough and I am thinking 4 X 3 devices so I will solder them all into there places this time instead of running on 1/4 impulse power Scotty.

Mike

Thats a duel N channel driver. It will work but IXYS Fets and IGBT's use larger gate capacitance, so a high amp driver is the way to go to get them moving fast.
Those Fets you using don't require that much. And really you not moving that fast, you only have one shot every so often. At most 2-3 times a second so if you want a high turn on rate you can add more capacitance to the driver side for a pretty quik turn on. Search "Bootstrap drivers in Power circuits"

With what your doing you could get away with driving the gate .5 amp at 18 volt. That will turn that fet on faster than you need.
The bigger the driver the more you have to suppress transient response on the gate circuit. So get ready for that if you move up.

The biggest thing you need to do is learn to calculate the need for power at your gate. All gates have a different capacitance value, and thats what dictates the power of the driver along with the speed the circuit is running.

@ Dave45
You lost me with the magical stuff....


Matt

[Dave45]

Nothing magical at all, no quantum entanglement or particles popping in and out of existence, just plain and simple separation of the aether into pos and neg using ionization and a collector circuit to gather the energy.

Look into air purifier's and static eliminators, study the buck and boost circuits.

A buck convertor increases amperage at the expense of voltage.

A boost convertor increases voltage at the expense of amperage.

There are pos and neg energy's at work in a circuit, we are taught to use conventional view where energy flows from the pos to neg but there is also energy that flows from neg to pos.

We have to allow for and collect both.