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

Claim 7:
8. The LED driving system according to claim 1, wherein the charging-current control module further includes a second power switch transistor, a second sampling unit, a third sampling unit, and a second operational amplifier, wherein
the second power switch transistor has a drain connected to the lower plate of the electrolytic capacitor and a source grounded via the second sampling unit;
the second operational amplifier has a first input connected to an output of the compensation unit and a second input connected to an output of the bus-voltage measuring module, and an output of the second operational amplifier is connected to a gate of the second power switch transistor to enable adjustment of the charging current of the electrolytic capacitor; and
one terminal of the third sampling unit is connected between the bus-voltage measuring module and the second operational amplifier, and the other terminal of the third sampling unit is connected between the second power switch transistor and the second sampling unit.