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Hello, I need to design a PSU which is connected to the mains 50Hz 220Vrms.
I MUST design a flyback with 24V output and an aux for the flyback IC. I have this part figured out.
However, I need help in the remaining part. I need a 5V @100mA max, 4V for radio IC that works on 0.5A continuous and...
Hello,
I'm working on a power supply design that has multiple outputs. I am using a flyback topology since the circuit is connected to the mains. I know that I need to have galvanic isolation to prevent failures and to prevent accidents. However I want to know when do I have to separate the...
Hello,
I'm designing a snubber for my flyback power supply working in DCM. I'm using UCC289100 which is based on primary sensing regulation the FET integrated in the IC is rated for 700V.
I can see in the literature that there are many variants for snubbers:
variant #1: TVS with a fast diode...
When voltage is implied current is always dependent on the load impedance. I think you have to start by understanding about vector spaces and their usage in realizing inverters. See the following links:
**broken link removed**...
Thank you for your replies and sorry for my late reply.
I was thinking of using TI's UCC28910 which includes an integrated FET and uses primary sensing regulation (PSR) to regulate my output without the need for feedback. AUX is used to sense the output voltage. What do you think? Has anyone...
What type of DC-DC converter are you using? Please provide the schematics of your DC-DC converter or its datasheet if its something off the shelf.
Are you seeing a voltage dip when you are running your dc-ac inverter?
A1. It is a 2 axis system since the vectors are now presented by the alpha and beta axis (before the transformation they were presented by a, b and c)
A2. The vectors pulsate along the axis a-axis, b-axis and c-axis respectively depending on time, magnitude, frequency and phase. Check out this...
Thank you KlausST for your reply.
I have another question regarding the calculations done for the design.
I don't understand how Nps(max) is being calculated in section 10.2.1.2.3. How is this formula derived?
Thank you
Hello,
I am about to use the UCC28910 from TI to design a multi-output converter.
My outputs are 24Vdc and 5Vdc.
To understand how this IC functions, I was reading its datasheet found on this link: Datasheet.
The IC uses primary side regulation where the aux terminal is used to sense the...
Hello,
I have a project where I need to design a power supply that is connected to the grid (230Vrms, 50Hz) and has two output voltages. The grid's voltage isn't rigid and varies between 140-250Vrms.
My power supply should have 2 outputs with galvanic isolation:
- Output #1 supplies 24Vdc...
Thank you for your reply.
As I was rethinking about my question, another thought came into my mind. Since the utility voltage is not fixed, the DC bus will vary between 30Vdc to 50Vdc. For the buck #1 where I want to generate 24Vdc that is not a problem. However for the 5Vdc don't you think...
Thank you for your answer. What is the best way to detect an early power fail for the 33Vdc? Are you suggesting connecting the power failure circuitry to the shutdown pin of the buck converters?
Can you please elaborate more please? What is the role of the diode here?
Thank you
Hello,
I need to design a power supply that is connected to the utility (220V rms) and outputs both 22Vdc and 5Vdc. I have a 220V to 24V transformer after which I have a full bridge rectifier and a capacitor to maintain proper DC voltage of about 33Vdc. I have loads that consume 100mA from my...
Hello,
I have an IC counter that outputs 8 bits Q1,Q2...Q8.
Is there an IC that stores this output and keeps this data when power supply is cut?
Thanks
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