| 摘要 |
PROBLEM TO BE SOLVED: To provide a power control circuit with an inexpensive current measuring circuit.SOLUTION: A power control circuit 1 according to an embodiment comprises an H bridge circuit 11 constructed with a plurality of power transistors. Current measuring circuits CM11 to CM22 each measuring a current flowing to the power transistor are arranged in each power transistor. Each of a plurality of power transistors includes: a main emitter; and a sense emitter to which the current corresponding to the current flowing to the main emitter is flowed. Each of current measuring circuits measures the current flowing to each power transistor by using the current flowing in the sense emitter arranged in each of the power transistors. A control circuit 12 controls each of power transistors on the basis of a current value measured in each of current measuring circuits CM11 to CM22.SELECTED DRAWING: Figure 1 |
