Abstract: A temperature compensated current source forms an uncompensated source current that is proportional to a reference voltage applied to an impedance, wherein the impedance varies with temperature. A temperature compensation current is formed that is proportional to absolute temperature (IPTAT). The uncompensated source current and the temperature compensation current is combined to form a temperature compensated source current and provided as an output of the current source.

Abstract: A temperature compensated current source forms an uncompensated source current that is proportional to a reference voltage applied to an impedance, wherein the impedance varies with temperature. A temperature compensation current is formed that is proportional to absolute temperature (IPTAT). The uncompensated source current and the temperature compensation current is combined to form a temperature compensated source current and provided as an output of the current source.

Abstract: The present disclosure describes systems and methods for driving light emitting diodes (LEDs). At least some embodiments include an LED driver system that includes a power supply, a plurality of current sources (each current source coupled between a common return resistor and one of a plurality of branches of series coupled LEDs, and each branch coupled between a corresponding current source and the power supply), and control logic coupled to the current sources (the control logic capable of controlling the current flow through each current source). Each of the current sources allows current to flow during one of a plurality of substantially non-overlapping time periods within a repeating time interval, each current source allowing current to flow during a different time period. The magnitude of the current flowing through each current source is substantially the same and is regulated based upon a feedback voltage across the common return resistor.