Patent ID: 11949357
Assignee: ROHM CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The control circuit according to claim 3, wherein the current detection circuit
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the first current detection value based on a voltage drop of the lower arm of the first phase in a period in which only the first phase is in a current sink phase,
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the second current detection value based on a voltage drop of the lower arm of the second phase in a period in which only the second phase is in the current sink phase,
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the third current detection value based on a voltage drop of the lower arm of the third phase in a period in which only the third phase is in the current sink phase,
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the first current detection value based on a voltage drop of the higher arm of the first phase in a period in which only the first phase is in a current source phase,
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the second current detection value based on a voltage drop of the higher arm of the second phase in a period in which only the second phase is in the current source phase, and
uses, as a standard, the current detection value based on the voltage drop of the external resistance to calibrate the third current detection value based on a voltage drop of the higher arm of the third phase in a period in which only the third phase is in the current source phase.