Lamp driving circuit with floating power supply driver

Details Lamp driving circuit with floating power supply driver Lamp driving circuit with floating power supply driver

2007-07-10

2007-07-10

Vu, David (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S22700A, C315SDIG002

Reexamination Certificate

active

11463586

ABSTRACT:
A lamp driving circuit with a floating power supply driver includes a microcomputing unit, a floating power supply driver, and a driving unit. The microcomputing unit and the floating power supply driver are independent integrated circuits and manufactured under a normal voltage. The floating power supply driver is coupled to the microcomputing unit via two independent high-pressure coupling capacitors, instead of sharing the same ground with the microcomputing unit. The microcomputing unit and the floating power supply driver provide at least one low-voltage driving pulse output pin and one high-voltage driving pulse output pin to control the power transistor inside the driving unit. The power transistor turns on/off at appropriate time so that a lamp connected to the driving unit can be lit up by a driving high voltage.

REFERENCES:
patent: 6100647 (2000-08-01), Giannopoulos et al.
patent: 7095183 (2006-08-01), Alexandrov

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