Jump to content
Electronics-Lab.com Community

Half Bridge Driver IR2153


Recommended Posts

Hi. I am going to try this circuit in the link. But With this circuit what I didn't understand is ground symbols. Where are they connected exactly(not the ETH I know it is for earthing). For the second circuit +V and -V connections are clear but 1/2V is connected to ground through the middle of rectifier capacitors. Should I connect it to somewhere or is it just for reference.

And for the first circuit CN1 and CN2 are connected together respectively and -V is connected to ground symbol. And again is it a reference for us to connect it with ground of 15V dc?

I am new to this forum. I searched and I didn't see any topic regarding this. Thank you for reading.


Link to comment
Share on other sites

36 minutes ago, admin said:

Hi Jackson and welcome to our community.

The 1/2V is actually the reference GND where the +V and -V are referred. This means that +V and -V are connected to your load with GND as 0V.

The same applies for CN2 and CN1

Thank you for the answer. So I can connect -V pin of CN1 directly to, for example, negative side of C5. And discard second circuit's ground symbol. Is that correct.

Link to comment
Share on other sites

I am confused by the circuit. If -v is grounded at connector CN1 then it is grounded at connector CN2 also. If so then capacitors C18,C19, C20, and  C21 are grounded on both ends?  Thus there would be  no 1/2 voltage and +v would be at full voltage off the bridge rectifier?

I must be reading the schematic wrong.


Link to comment
Share on other sites

If you see the schematic of both Power Supply + IR2153 together, ground looks shorting but both PCBs are separate so actually ground is not shorting, both PCBs are connected through only 3 wires, check the picture, if you see schematic of both it looks confusion, if you build the circuit and connect as per picture it will work perfectly,


Link to comment
Share on other sites

  • 2 months later...

The good news with the IR2153 is that it has a 50% duty cycle. The bad news is that you can not change it like in the 555 timer.

You can change the frequency which would change the impedance at the coil/transformer which may give you some control of the output with the potentiometer PR1. Perhaps a larger potentiometer?


Others may find the two schematics here easier to follow - without all the bells and whistles of this one.

https://www.homemade-circuits.com/half-bridge-mosfet-driver-ic-irs21531d/#:~:text=Application Note%3A The main application of this IC,for driving mains CFL lamps from 12V supplies.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...