Dear all,
My company has a design that uses the LM5116 power supply, but it is having problems right now.
- Use the schematic with component values as shown in the datasheet of LM5116 (Reference Design).
- When switching from no load to medium load, LM5116 does not supply 5V output, using the multimeter it can measure 5V but the backsystem using 5V source of LM5116 doesn't work.
- Vin=12V, Input current = 1.1A, Vout=4.9V, RL=3Ohm, Output current = 1.6A.
- When I removed load (no load), Input current =0.4A, the inductor was quite hot. And repowering 12V, after a short time, the input current will increase again to 0.4A with no load, the inductor will heat up again.Changed the coil and the condition is still not improving.
You can see details in the attached file.
Can you give me solutions to fix the above problem?
Thanks in Advance.
VietCuong
