| 摘要 |
A circuit configuration for driving a light-emitting diode (D1 to D6) by means of a current provided by a supply voltage source (12) includes an inductance (14) connected in series between the supply voltage source (12) and the LED (D1 to D6). A switch (16) that can be either in the open or in the closed position and that is connected between the junction of the inductance (14) with the LED (D1 to D6) and ground, which, when in the closed position, short-circuits the LED (D1 to D6). A control circuit (18) which takes the switch (16) into its open position when the current flowing through the inductance (14) has risen to a pre-determined value, and which takes the switch (16) into its closed position when the current through the LED (D1 to D6), or the voltage across the LED (D1 to D6), has fallen to a pre-determined value.
|
