Other Parts Discussed in Thread: TPS25983
Tool/software:
Hello,
Our objective is to protect an n-channel mosfet from over-current damage due to a short circuit across a user LED STRIP port. It is common for this port to be exposed to a short circuit since the LED strip is intended to be installed in locations that can be hit by moving vehicles, and these incidents can cause the wires to become damaged and create these fault conditions.
Our input power is typically 24V @ 2 Amps but in some instances we require as much as 24V @ 5 Amps. It must also be able to support 12V @ 5 Amps minimum.
We chose TPS259804O due to the eFuse short-circuit protection, TI's reputation, and component price. Part of my question has to do with if you believe this specific part can do the job that we require of it. If not, please recommend a more appropriate chip.
If so, I have provided a schematic below as well as a photo of my protoboard which does not appear to work properly. I understand that PCB layout is equally as important with this much power, but for my testing I capped the current to a quarter of an amp and it still only put out 7V with an input of 24V.
I would be very appreciative if you could review my schematic and suggest adjustments and changes to work with our specific requirements. Perhaps you could also tell me based on what I've provided some explanation on why this design doesn't work.
Thank you for your expedient attention to this issue.
