Patent ID: 11871492
Assignee: ROHM CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. The light emitting element drive device according to claim 7, further comprising an abnormality detection circuit configured to detect whether or not the drive reference voltage has an abnormality, on the basis of a voltage at the specific external terminal in the second mode, wherein the light emitting element drive device is configured such that if the abnormality detection circuit does not detect an abnormality in the second mode, the switch control circuit keeps turning off the first switch and keeps turning on the second switch, and if the abnormality detection circuit detects an abnormality in the second mode, the switch control circuit switches the first switch from off to on and switches the second switch from on to off, so that operation mode of the drive reference voltage generation circuit is changed from the second mode to the first mode.