Current control circuits
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United States of America Patent
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Jul 25, 2017
Grant Date -
N/A
app pub date -
Jul 13, 2016
filing date -
Apr 6, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A current control circuit for a driving circuitry system of an LED component is provided. In the driving circuitry system, a rectifier provides a rectified voltage to an anode of the LED component, and a current module sets a current flowing through the LED component. In the current control circuit, input and output terminals of a voltage regulator are respectively coupled to the input terminal of the current module and a non-inverting input terminal of an operational amplifier. An inverting input terminal of the operational amplifier is coupled to an output terminal of the current module, and an output terminal thereof is coupled to one terminal of a capacitor. An output-terminal voltage of the first operational amplifier is provided as a reference voltage for the current module. One terminal of a resistor is coupled to the inverting input terminal of the operational amplifier.
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