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US 10,897,196 B2Granted
Arrangement and method for delivering a current-controlled voltage
AssigneeTactotek Oy
InventorsMiikka Kärnä, Tuomas Heikkilä
Life of this patent
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Abstract
An arrangement involving printed conductive traces includes at least a voltage source (Vsupply) and at least one target component, preferably a light-emitting component such as an LED. The arrangement is adapted to produce a current-controlled voltage (VOUT2, Vout) originating from the voltage source, the current-controlled voltage being coupled to the at least one target component, wherein said voltage is dependent on the current (IR,LED, ILED) that is being passed through the target component and said voltage is adaptable to a varying resistance of the arrangement and its features.
Claims6
An arrangement including printed conductive traces, the arrangement comprising:
- a first voltage source (Vsupply);
- a current sense amplifier configured to produce a first output voltage;
- at least one target component, the arrangement being configured to produce a current-controlled voltage (VOUT2, Vout) originating from the first voltage source, the current-controlled voltage being coupled to the at least one target component, wherein said current-controlled voltage of the first voltage source is varied in response to a change in the first output voltage of the current sense amplifier, such that the current-controlled voltage is dependent on a current (IR,LED, ILED) that is being passed through the at least one target component;
- and
- at least one of each of a measuring circuit and a voltage regulation circuit, wherein the measuring circuit is configured to detect a current (IR,LED) that is at least indicative of the current being passed through the at least one target component, wherein the measuring circuit is additionally configured to control the voltage regulation circuit to produce a second output voltage (VOUT2) that is dependent on said detected current, the second output voltage (VOUT2) being the produced current-controlled voltage that is coupled to the target component, wherein the target component comprises at least one LED, wherein the measuring circuit comprises at least the current sense amplifier and a first resistor and the voltage regulation circuit comprises at least a first transistor and a voltage regulator, wherein the current sense amplifier is configured to detect a current passed through the first resistor, which is the current (IR,LED) that is at least indicative of the current being passed through the at least one target component, with the first output voltage (VOUT1) of the current sense amplifier being dependent on said detected current, said first output voltage controlling the first transistor by the first output voltage being lead to a base of the first transistor, and the first transistor controlling the second output voltage (VOUT2) of the voltage regulator by an impedance of the first transistor determining the second output voltage through adjusting an adjustment voltage (Vadj) of the voltage regulator, the second output voltage being the produced current-controlled voltage that is coupled to the at least one target component.
2 more elements
A method for delivering a current-controlled voltage to at least one target component, the method comprising at least the steps of:
- providing a target component,
- providing printed conductive traces,
- providing a first voltage source (Vsupply),
- providing a current sense amplifier configured to produce a first output voltage,
- producing a current-controlled voltage (VOUT2, Vout) from the first voltage source, wherein the current-controlled voltage of the first voltage source is varied in response to a change in the first output voltage of the current sense amplifier, such that the current-controlled voltage is dependent on a current (IR,LED, ILED) that is being passed through the target component,
- coupling said current-controlled voltage to the target component,
- providing a measuring circuit and a voltage regulation circuit and detecting a current (IR,LED) with the measuring circuit, the current being at least indicative of the current that is being passed through the target component, wherein producing the current-controlled voltage comprises steps of:
- setting the first output voltage (VOUT1) according to said detected current,
- delivering said first output voltage to the voltage regulation circuit,
- setting a second output voltage (VOUT2) of the voltage regulation circuit according to said first output voltage, and
- coupling said second output voltage to the target component, wherein the target component comprises at least one LED,
- providing a first resistor to be comprised in the measurement circuit,
- providing the current sense amplifier to be comprised in the measurement circuit,
- providing a first transistor to be comprised in the voltage regulation circuit,
- providing a voltage regulator to be comprised in the voltage regulation circuit, wherein the detecting of the current is carried out through the first resistor and the current sense amplifier and the first output voltage is provided by the current sense amplifier,
- controlling the first transistor through the first output voltage,
- adjusting the adjustment voltage of the voltage regulator through the first transistor, and
- producing, with the voltage regulator, the second output voltage that is coupled to the target component, the second output voltage being dependent on the detected current.
15 more elements
Dependencies are inferred from the claim text.