A power tool comprising: a tool housing ; a brushless DC (BLDC) motor disposed within the tool housing, the motor including a stator assembly and a rotor assembly rotatably interacting with the stator assembly; and a power module for driving the motor, comprising: a power circuit board ; a plurality of power switches operatively connected to the motor disposed on a first side of the circuit board; and a plurality of positional sensors disposed on a side surface of the power circuit board facing the motor, characterized in that the power circuit board comprises a thermally-conductive core carrier layer , a first conductive layer , a first electrically-insulating layer disposed on a first side of the core carrier layer, the plurality of power switches being mounted on the first conductive layer, and a second conductive layer and a second electrically-insulating layer disposed on a second side of the core carrier layer, the plurality of positional sensors being mounted on the second conductive layer, wherein the second electrically insulating layer and the second conductive core layer are etched to expose the thermally-conductive core carrier layer on at least approximately 70% of a surface area of the second side of the circuit board. a tool housing ; a brushless DC (BLDC) motor disposed within the tool housing, the motor including a stator assembly and a rotor assembly rotatably interacting with the stator assembly; and a power module for driving the motor, comprising: a power circuit board ; a plurality of power switches operatively connected to the motor disposed on a first side of the circuit board; and a plurality of positional sensors disposed on a side surface of the power circuit board facing the motor, characterized in that the power circuit board comprises a thermally-conductive core carrier layer , a first conductive layer , a first electrically-insulating layer disposed on a first side of the core carrier layer, the plurality of power switches being mounted on the first conductive layer, and a second conductive layer and a second electrically-insulating layer disposed on a second side of the core carrier layer, the plurality of positional sensors being mounted on the second conductive layer, wherein the second electrically insulating layer and the second conductive core layer are etched to expose the thermally-conductive core carrier layer on at least approximately 70% of a surface area of the second side of the circuit board. a power circuit board ; a plurality of power switches operatively connected to the motor disposed on a first side of the circuit board; and a plurality of positional sensors disposed on a side surface of the power circuit board facing the motor, characterized in that the power circuit board comprises a thermally-conductive core carrier layer , a first conductive layer , a first electrically-insulating layer disposed on a first side of the core carrier layer, the plurality of power switches being mounted on the first conductive layer, and a second conductive layer and a second electrically-insulating layer disposed on a second side of the core carrier layer, the plurality of positional sensors being mounted on the second conductive layer, wherein the second electrically insulating layer and the second conductive core layer are etched to expose the thermally-conductive core carrier layer on at least approximately 70% of a surface area of the second side of the circuit board. <EOS>