Hi, I'm trying to do a project but I don't know if the way I designed the circuit is the best way. The circuit is a half inverter bridge with N channel mosfet and TRANSISTORs BC547, when a PWM is applied in place of the 5v interrupetor of the arduino should turn on the mosfet from above and turn off the bottom, but I do not know if it will work and I am afraid to burn something. When applying a HIGH signal the output should have +9V, and when applying a LOW signal the output must have -9V. I hope you can understand and help me.
For 5V circuits, use logic level MOSFETs. Also, use symbols that clearly identify P and N channel MOSFETs
What are the red and blue flags for?
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where I'll apply the precise circuit of a PWM of 1KHz, +12V, 12V and 2A strict, Preferred to use all the n channel mosfes, the blue and red flags of the simulator I used, the red means VCC and negative tense blue or ground, but ignore this, the simulator is old and not very accurate, calls croctech.
Not even close. The lower transistor is always biased "on".
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can you tell me what to do to solve or some scheme?
I would first look for driver IC's.
can I do without IC? if you don't know any examples of ic that control negative and positive tension? i'm a beginner i don't understand much
The problem with such circuit is a "shoot-through" caused by +9V and -9V turned on at the same time (one transistor opens before the other turns off). You need to add a "dead time" somehow.
What currents do you want to switch? What is the load? How quickly you need to switch the polarity? Why not using a H-bridge to get rid of the negative supply? You can get a fool-proof H-bridge IC/module.
the load is 2 amps, PWM1Khz, 5% to 60% duty and +/-12V, the type of load do not know well, but I think it is not an inductive load, I need half a bridge
There are plenty of working designs for full H-bridges on the web. Use half of one of them.
and can I use with positive and negative tension? all I see is only with vcc and ground
You only see H bridges with a single supply because that is the whole point of an H bridge - to provide a bipolar output from a single supply.
A bipolar driver (half of an H bridge with split supplies) differs only in that the common return from the load goes to the common of the split supply.
Every time I come back to this thread, I see an extremely complex project, along with extremely naive questions. Thus, you need to come clean and provide the full context for this project. It's really expected of you, anyway, if you truly wish to get useful help here.
I don't think i'm naïve, i just try to understand
Relative to the task you have set yourself, you are naive (obviously not experienced). Instead of defending yourself, you should tell us what you are really trying to do here. If not, you won't get anywhere with your question.
This is only a forum, not an engineering course. You can get help solving adjunct problems to work and research that you undertake elsewhere, but you can't get it all here. So it is extremely important that you reveal your situation, strategy, motivation, and details of your project.
Okay, I'm trying to make an electric vehicle charger, and what controls the load current is a PWM. I think I can do but this issue of pwm underestimated it, I thought it would be easier.
According to what? Was that your assessment, or a requirement of existing hardware? See, you haven't told us nearly enough.
Why do you think you need a bipolar supply for a battery charger? Where is your schematic diagram? What are the system specifications, for example what battery, what charge rate, etc. etc.... how will you perform charge regulation?
The feature is actually mandatory.
Here one of the most complete sources I took the data: SAE J1772 - Wikipedia
Load adjustment is done by duty cycle in pwm.
For a battery charger, you need single voltage supply and a voltage/current regulator, programmed for the cell type. Nothing you have done so far applies.
You are not providing the details that would allow me to help you. Good luck with your project.
what details want