Hi,
I have a device that draws ~1A average but peaks at upwards of 10A for a few ms a couple of times a second, over a 1 second sample the average is 1A. It switches 24V down to 12V through a FDD4243 P-Fet and a 22uH 11A Inductor. The controller of choice here is a **broken link removed** Hysteretic Buck Controller.
Schematic is attached.
My issue is the temperature of the SMPS while opperating at load with 26V input. I meassured the PFET at 95°C and the Inductor at 85°C, they are both pretty close together and the inductors drain pad probably isn't as big as I should have made it, but it shouldn't really be running that hot? Or have I missed something? Should I perhaps have a different inductor or PFET ?
Any help is greatly appreciated!
I have a device that draws ~1A average but peaks at upwards of 10A for a few ms a couple of times a second, over a 1 second sample the average is 1A. It switches 24V down to 12V through a FDD4243 P-Fet and a 22uH 11A Inductor. The controller of choice here is a **broken link removed** Hysteretic Buck Controller.
Schematic is attached.
My issue is the temperature of the SMPS while opperating at load with 26V input. I meassured the PFET at 95°C and the Inductor at 85°C, they are both pretty close together and the inductors drain pad probably isn't as big as I should have made it, but it shouldn't really be running that hot? Or have I missed something? Should I perhaps have a different inductor or PFET ?
Any help is greatly appreciated!