MEASURING CURRENT IN A POWER REGULATOR SYSTEM

摘要

One embodiment includes a power regulator system (10). The system includes a gate driver circuit (28) configured to generate switching signal and a switching circuit package (12) configured to receive the switching signal at a gate terminal (18). A signal return associated with the switching signal is provided at a gate return terminal (30). The switching circuit package (12) also includes a switch (14) that is periodically activated in response to the switching signal to generate a switching voltage at a switching node terminal (22). A filter stage (32) includes an inductor interconnecting the switching node terminal (22) and a node (34). The inductor can be configured to conduct a current in response to the switching voltage to generate an output voltage. A current sense circuit (36) interconnects the gate return terminal (30) and the node (34) and measures a magnitude of the output current.