Tool/software:
Hello,
I am evaluating the TPS923655DRRREVM with the following target conditions:
Input: 24 V
Output: 36 V, 1 A
I set the current sense resistor to 0.2 Ω (calculated value), but the actual output current is only around 800 mA.
For the power stage, I am using an inductor of 22 µH and an output capacitor of about 20 µF. However, I found that changing the inductance or output capacitance significantly affects the output current—easily by about 100 mA.
My questions are:
Is this level of variation expected due to the device’s operating principle?
For a finished product, should I plan to leave more margin and adjust the sense resistor value during final tuning?
Should I also take into account the possible reduction of inductance or capacitance over time, as this could further impact the output current?
Thank you for your advice.
