Jackson1 Posted May 26, 2020 Report Share Posted May 26, 2020 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. Quote Link to comment Share on other sites More sharing options...
admin Posted May 26, 2020 Report Share Posted May 26, 2020 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 Quote Link to comment Share on other sites More sharing options...
Jackson1 Posted May 26, 2020 Author Report Share Posted May 26, 2020 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. Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 26, 2020 Report Share Posted May 26, 2020 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. Quote Link to comment Share on other sites More sharing options...
admin Posted June 2, 2020 Report Share Posted June 2, 2020 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, Quote Link to comment Share on other sites More sharing options...
Russ Keller Posted August 20, 2020 Report Share Posted August 20, 2020 Is there a way to pulse width modulate to regulate or reduce the output. We are currently using this in our ozone generators but would like to be able to adjust the output. Thank you [email protected] Quote Link to comment Share on other sites More sharing options...
HarryA Posted August 21, 2020 Report Share Posted August 21, 2020 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. Quote Link to comment Share on other sites More sharing options...
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