Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Connector from battery to pcb
Hi All
I am designing a grid tied battery powered inverter where the input battery voltage is 48 volt and the max input current from the battery in steady state can go to as high as 105 Amp (4800 Watt inverter). That means for the input terminal connectors from...
Yes. I have decided not to isolate my micro-controller from power stage. But I'm a little confused here. Why somebody should consider to isolate the micro-controller for a buck converter (which is non isolated power converter anyway) at all? Is there any application or circumstances that demands...
Hi Folks
I have designed a DC/DC converter 3kW, 300V input /150V output buck converter that for now works in open loop fashion using a micro controller. Now I wanted to implement a voltage loop control. From my previous experience the easiest way is to use voltage divider for 150V output and...
Hi All
I am planning to design a DC/DC converter 3kW, 300V input /150V output with no need for isolation. Frequency around 100khz is desirable. On the paper synchronous buck with 400V or 600V Mosfet can do the job. However, at this power range and this frequency I only see people use LLC or...
Thanks for your reply. This topology I posted is flybuck which has been introduced by TI and is very helpful for very power isolated power(<5W). Here you can see an application note addressing this:
**broken link removed**
Flyback and push pull are more expensive than this topology and they...
Hi
I need to design a circuit which can provide 8 isolated supply rails around 12 volt for isolated gate drives. 0.25W is max power needed for each output and so total power is 2W. Obviously a simple design solution can be two separate flybuck converter that each includes: one flybuck...
Thanks For your recommendation . I understand that these didoes are snappy and I actually noticed the D201 and D211 in my converter get very hot since they have do absorb lots of ripple caused by reverse recovery of MUR1540. But the thing is that I havn't been able to find any alternative for...
Thanks Akanimo and asdf44
It looks like I have been able to fix the issue using both of you guys comment. As you guys predicted the parasitic inductance was the issue but the point I was missing was that it was mostly the loose connection of this wire to the vias. The via were dirty and only...
Thanks for your response Akanimo
The reason I was reluctant to add scrubber across the 16 gage wire was I though it will steal some of the current that is sensed by CS1 and may affect precision of current control at the fundamental frequency which is 100kHz. . If I want the snubber to damp...
Dear asdf44
Thank for your response. The Dc bus voltage measured directly across Q200.D/Q202.S as you can see in the picture 1 below is as bad as the drain to source voltages(What does it prove?). I just added an EMI toroid core around the 16 gage wire as you can see in picture 2. I was able...
I have 3 big 390 uF cap connected on the input which has not been shown in schematic along with several 600V, 0.1uF ceramic caps. Layout is good but even if the layout is improved more there would be still some nH inductance due to current sense primary wire loop which I can not eliminate. That...
Hello All
I’m working on a phase shifted full bridge dc/dc power supply prototype right now. The converter has been designed for 800W continuous power and must regulate for max 2 seconds of 2400W over load. The input is 400V coming from external power supply for now (later from PFC) and the...
My output voltage for both LLC and phase shifted full bridge is 170V and input 400V. For PFC the input is universal 85Vrms to 265Vrms and output 400V.
I understand that I can have very good efficiency numbers by spending money and sacrificing size on magnetic and semiconductors but we are not...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
