Tool/software:
Hello
On a lot of our PCB boards we have two DC-DC voltage converters to support some components with +15V and some with -15V. Our main supply voltage is +24V. the measurements were conducted at room temperature (20°)
We use the TPSM for both voltages with the same layout and the same load(105mA). However the Chip wich is producing -15V is always about 15°C hotter than the one producing +15V. According to the datasheets, efficiency should drop only about 10% when used as inverting-buck-boost converter, but in my opinion this cant be the reason for a 15° difference.
+15V -> 50°C at 105mA
-15V -> 65°C at 105mA
I just wanted to know if thats normal or if i need make some adjustments to the circuit to get rid of this issue without adding cooling.
