Patent ID: 11864282
Assignee: ROHM CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The light emitting element driving device of claim 2, wherein
the light emitting element driving device includes a current setting unit that generates the current set voltage, and
the current setting unit includes:
a third transistor, including a control end, a first end, and a second end;
an error amplifier, including:
a first input end, to which a reference voltage is input;
a second input end, to which a voltage generated in a second node to which the first end of the third transistor and a first resistor are connected is input; and
an output end, connected to the control end of the third transistor

a second current mirror, including an input end and an output end connected to the second end of the third transistor; and
a second resistor, connected to the output end of the second current mirror.