thank you for using the E2E forum.
For more accurate review can you please provide some more details:
- input voltage range
- Inductor parameter: DCR, Saturation Current
By the way: another great tool is the Quickstart Calculator which allows…
You need to make sure that the converter is stable in all input voltage conditions. If it gets unstable when entering boost mode, it is possible that the compensation does not fit this condition. Please use the quickstart calculator here…
On the schematic I am able to identify the input voltage range and the output voltage, but for an analysis of the circuit, I need as well at least the maximum output current, please tell me.
On the other hand, you can do a first analysis…
LM5176 is the predecessor of LM5175.
LM5175 is in general able to support almost the same current as LM5176, it has a lower current capability in the buck-boost mode. Webench should support this, I will request an update.
Please use the design…
Thanks for your reply. Let me share some comments from my side. A gate resistor of 49.9 ohm sounds a bit too high, having a big gate resistor on the gate of the MOSFETs might cause issues in its turn-on process. The first thing that I would…
What is the minimum input voltage that you want to support with this design? At the moment the converter starts at 4.7V.
You need to update the compensation to fit your requirements. At the moment, the converter is unstable for voltages below…
Part Number: LM5175 Other Parts Discussed in Thread: LM5176 , Hi,
I'm designing DC charger using LM5175 IC, specs:
Switching Freq: 256k Hz
We encounter an issue below
When the DC charger start-up in boost mode it will deliver…
Thanks for reaching out with your questions and for using the LM5175 in your design.
To help improve the control loop response I suggest using the LM5175 quick-start calculator. this will allow you to see the phase margin and gain margin as…
The ferrite bead adds inductance to the gate line. As the gate line needs to charge the MOSFET capacitance, the inductance of the bead can cause trouble. You might use gate resistors instead.
I would recommend to use the quickstart calcu…