DRIVER CIRCUIT FOR LED VEHICLE LAMP

An LED driver includes a first LED string having an anode of a first LED connected to an input voltage, and a cathode of a last LED connected to a first current sensing resistor and a second LED string having an anode of a first LED connected to the input voltage and a cathode of a last LED connecte...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JOHNSEN, ANDREW O, MADHANI, VIPIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL BASIC ELECTRIC ELEMENTS ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY PERFORMING OPERATIONS SEMICONDUCTOR DEVICES TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	An LED driver includes a first LED string having an anode of a first LED connected to an input voltage, and a cathode of a last LED connected to a first current sensing resistor and a second LED string having an anode of a first LED connected to the input voltage and a cathode of a last LED connected to a second current sensing resistor. A control switch is connected to the first and second current sensing resistors for providing regulation of current passing through the first and second LED strings in response to a stop signal and a tail signal provided to the LED driver. A feedback circuit is connected to the control switch for controlling the control switch and the current passing through the first and second LED strings in accordance with the state of the stop signal and the tail signal.