Buck-mode boost converter with regulated output current

Details Buck-mode boost converter with regulated output current Buck-mode boost converter with regulated output current

2009-04-09

2011-11-15

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S225000, C315S299000, C315S301000, C315S308000

Reexamination Certificate

active

08058812

ABSTRACT:
An LED driver circuit that includes a buck-mode boost converter that provides a regulated output current and that requires only a single connection to each channel of LEDs. The buck-mode boost controller may include a current regulator that includes an integrator. The current regulator may be configured to integrate a difference between a reference signal that is representative of the desired level of the average current through the electronic power switch and a detected signal that is representative of the actual current that is being delivered to the buck-mode boost circuit through the electronic power switch. The reference signal to the integrator may not change during operation of the buck-mode converter. The current regulator may be configured to deactivate the integrator and/or to disconnect the detected signal from the integrator while the electronic power switch is off.

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