Current Control Circuit for Linear LED Driver

摘要

Employed within an LED driver operating from the AC power line, the invention controls both input current and output power. With this regulation circuit, input current appears purely resistive, precisely tracking the input voltage waveshape. At the same time, it provides good line regulation and inherent phase dimmer compatibility, requiring no special circuitry to detect and handle a dimmer.

主权项

1. A circuit for controlling current in one or more current regulators comprising:
a circuit for accepting and scaling a time-varying signal; a circuit for generating a time-average of the scaled signal; a circuit for subtracting the time-averaged signal from a fixed reference signal; a circuit for multiplying the time-varying signal by the subtracted signal; one or more current regulators for receiving the multiplied signal.