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Here are some pictures of my chaotic wiring, and the noise seen at the oscilloscope. and the 200V SMPS.
both this power supply and the 3V supply are powered by the same source, but they are both connected directly to the voltage source itself, in an attempt to minimize the noise from the...
hi, i have an application that is powered by a 7.4V Li-Po battery. I use a flyback SMPS to generate a high voltage of 200V, and also some other DC converters to get 3V and -3V.
the low voltage powers some digital IC's. the problem is that the +- 3V line picks up way too much noise, i.e. around...
Hello, i have recently designed a 7V to 200V DC-DC SMPS converter, using LT3757. The output current is in the 1-10mA range. I use a DA2032 from coilcraft with a 1:10 ratio. At steady state, i get peak currents of 1.5A at the primary. My controller supports only non-isolated flyback, due to the...
really? according to texas pcb guidelines, and others "At the 0.5mm pitch, there is sufficient space between pads to allow for a via that has the same dimension as the package ball pad. The pad and via are connected with a 200um wide trace."
https://www.ti.com.cn/cn/lit/an/sprabb3/sprabb3.pdf
Hi, i am working on a design with this chip: https://www.digikey.com/product-detail/en/csr-plc/CSR8675C-IBBH-R/CSR8675C-IBBH-RDKR-ND/5423495
It is 0.5mm pitch, ball diameter of 0.3mm, and my landing pads are 0.25mm. After much research i came across 3 options to do the fanout on my PCB, and i...
"Your spacing should firstly be in hard metric as should your design as modern components are hard metric..."
thats good to know; i prefer metric but a lot of datasheets are still in mils, but ill gladly switch to mm.
i reviewed my design.
my BGA has a 0.3mm ball diameter and 0.5 pitch. I used...
i am used to manufacturers like iteadstudio and oshpark that offer a couple of PCB prototypes for under 100$. This time i am making a PCB with more difficult capabilities, ~2 mil for track width/clearance because of BGAs. I am searching for a manufacturer that specializes in prototypes without a...
Thank you Brad.
the step-up ratio for my flyback transformer is aimed to be around 1:10, but the SMPS itself has a 9V input and a 180V output.
The converter ratio depends on the PWM ratio of the controller and the feedback which controls this PWM.
The transformer is used to isolate the output...
i have a SMPS power supply, very similar to the one found at page 30 on this document:
https://www.onsemi.com/pub_link/Collateral/AN920-D.PDF
my goals are to obtain:
flyback configuration
Vin=9V
Vout=180V
Iout=3mA
Here is my circuit
- I added primary and secondary ESR, based on the...
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