Tool/software:
Hello,
I am using the TPS61178 part to create 12V output from a li-ion battery input with a current limit. I have an issue as the IC seems to not start switching at all. I try to inject 3.9V from a lab supply and the output gets stuck to 3.4V. When I probe SW, it's a full DC signal at 3.9V and VCC is DC signal at 3.4V. I also probed FREQ/SYNC and ILIMIT and they were at 0V whereas I thought I would find them at same level as VCC.
I tried to put a 100ohm load on the output and the output voltage was lower (3.2V). Seeing all of this, I thought I made a mistake on EN but the datasheet says it's logic high and my EN pin is at the same level as VIN (3.9V).
Here is my schematic below :
