TPS40304 has R(ds) current sensing. The voltage of SW is negetive when low side FET is turned on, because the current is flow from source to drain. But the voltage of OC is positive. Why does it can do over current project?
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TPS40304 has R(ds) current sensing. The voltage of SW is negetive when low side FET is turned on, because the current is flow from source to drain. But the voltage of OC is positive. Why does it can do over current project?
Zhipeng,
This is handled inside the IC. (in regards to comparison of the OC set point and voltage across fet)
Regards,
Mathew