| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED driving device that can be mounted in a straight tube type housing, configured to be compact in size and light in weight and can reduce noise.SOLUTION: An LED driving device has a circuit board PCB which can be mounted in a straight tube type housing and on which wiring patterns P1 to P6 are formed, a DC power source which is connected to the wiring patterns and has a rectifying unit and a first capacitor C1, and a non-insulation converter which is connected to the DC power source through the wiring patterns and has a switching element SW, a reactor L, a diode D and a second capacitor C2. At least the first capacitor, the switching element and the reactor forms a first current loop LP1 through the wiring patterns when the switching element is conducted, and at least the reactor, the diode and the second capacitor forms a second current loop LP2 through the wiring patterns when the switching element is non-conducted. The length of the first current loop is set to be less than the double of the length of the second current loop.SELECTED DRAWING: Figure 1 |
