| 摘要 |
The invention relates to an LED power supply device, for the supply of at least one white light LED (LED), by means of a small voltage source (UBATT) and a current sink made from discrete components, comprising a current sink transistor (T1), provided with a base resistance (RB), connecting the current sink transistor to a switch line (IN/OUT) and an emitter resistance (RE), wired between the current sink transistor and earth and a voltage regulator (T2, R1, R2), which is connected between ground and a node between the current sink transistor and the base resistance thereof. |
