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

Claim 2:
3. The light emitting element drive device according to claim 1, wherein
the drive reference voltage generation circuit includes a reference current generation circuit configured to generate a reference current commonly in the first mode and in the second mode, a current superimposing circuit configured to generate the second mode current only in the second mode out of the first and second modes, and a current mirror circuit configured to generate an output side current proportional to an input side current, so as to generate the drive reference voltage in proportion to the output side current, and
in the first mode the input side current is equal to the reference current, and in the second mode the input side current is equal to the reference current plus the second mode current.