About DPA switch related problem
Hii...
We have design 11.5W DC to DC Converter using DPA424PN Switch.The Specification of our design are given below,
Input voltage : 24-25Vdc.
Output 1:+15V @ 0.5Amp
Output 2: -8V @ 0.5Amp
output without load is OK but when we add 0.1 Amp load at +15V output then after 2 Sec output diode (MUR110E) get heated and output goes to 0V.
after that we replace MUR110E with 1N5822 diode then diode is not heat. why this happen?
please help us.
find attached copy of SMPS design.
回應
Hi,
Thank you for considering Power Integrations for your solution.
Could you please also provide the PI expert documentation for the design?
Please also provide layout details and transformer documentation.
Best Regards,
PI-Kryten
Thank you for reply...
we provided schematic,Transformer design and PCB Layout.
Please find the attached copy of documents required for our design.
| Attachment | 大小 |
|---|---|
| Circuit diagram | 230.99 KB |
| Transformer Design | 233.33 KB |
| PCB layout | 229.31 KB |
Thank you.
Please also provide PI-Expert file for analysis.
Best Regards,
PI-Kryten
Hii,
Please find the attached copy of PI Expert Files.
| Attachment | 大小 |
|---|---|
| Design File | 305.22 KB |
Hi,
The design as such looks good. No obvious reason for the diode to heat up.
Was this a one-off event with just that part or do you see it on multiple parts?
Also, please send a pdf file with the final layout.
Best Regards,
PI-Kryten
hii...
Please find the attached copy of our final layout and schematic.
Thank you
| Attachment | 大小 |
|---|---|
| schematic | 595.65 KB |
| Final layout | 766.98 KB |
Thank you, were you able to confirm your finding on other parts?
Best Regards.
PI-Kryten
Please anyone help us to solve this problem in SMPS.