| 摘要 |
<p>An LED drive device comprises: an insulating power conversion unit, further comprising a transformer having a primary coil, a secondary coil, and a tertiary coil, and a switching element which is connected to the first coil, said insulating power conversion unit supplying power to an LED load via the secondary coil; a feedback unit which is connected to the tertiary coil, said feedback unit further comprising a control information detection unit which detects control information and a voltage detection unit which detects coil voltage information of the tertiary coil; and a control unit which controls the switching element on and off. The feedback unit outputs a feedback signal wherein the control information based on the on-off control and the coil voltage information are superpositioned, and the control unit carries out the on-off control based on the feedback signal.</p> |
