Patent ID: 11917735
Assignee: CRM ICBG (WUXI) CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. The LED driving system according to claim 1, wherein the constant-current control module includes a first power switch transistor, a first sampling unit, and a first operational amplifier; a drain of the first power switch transistor is connected to the negative terminal of the LED load, and a source of the first power switch transistor is grounded via the first sampling unit; inputs of the first operational amplifier are connected to the source of the first power switch transistor and a reference voltage, respectively, and an output of the first operational amplifier is connected to a gate of the first power switch transistor; a sampled voltage obtained by the first sampling unit is compared with the reference voltage to control a magnitude of a current flowing through the LED load.