| 摘要 |
In one embodiment, an electrical system having an LED array, a first current source connected to provide a first current to the LED array, a current-sense resistor connected to the LED array, a second current source connected to provide a second current to the current-sense resistor, a control processor, and a voltage sensor adapted to provide a corresponding sensor signal to the control processor, wherein the control processor is adapted to control the first and second current sources based on the sensor signal. The first current source having a diode with first and second sides, an inductor connected between a first reference voltage source and a first side of a diode, a capacitor connected between a second side of the diode and a second reference voltage, and a transistor connected between the first side of the diode and the second reference voltage.
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