LED DRIVER AND DRIVING METHOD

摘要

An LED driver uses a current setting passive component to set an operating current, and also uses a voltage setting passive component to derive an acceptable voltage range. A current driver is then controlled to deliver the current setting and monitor that a voltage being provided is within the acceptable voltage range.

主权项

1. An LED driver, comprising:
a current setting input for connection to a current setting passive component; a voltage setting input for connection to a voltage or power setting passive component; a measuring circuit for measuring a characteristic value of the current setting passive component and a characteristic value of the voltage or power setting passive component; a controller; and a current driver, wherein the controller is adapted to:
derive a current setting for the current driver from the current setting characteristic value;derive an acceptable voltage or power range from the voltage or power setting characteristic value; andcontrol the current driver to deliver the current setting and monitor the output voltage or power to determine whether or not it falls within the acceptable range.