| 摘要 |
PURPOSE:To prevent an erroneous operation of a switching power source by inserting a diode to a reference voltage line of a drive circuit and a control circuit of switching means, thereby blocking a current of the drive circuit to flow the control circuit when a plurality of switching power sources are operated in parallel. CONSTITUTION:A diode 4 is connected in polarity as shown to a 0V line between a drive circuit 2 and a control circuit 3 of a switching power source SWRG-1. The diode 4 is similarly connected to a switching power source SWRG- 2. Accordingly, a drive current ID flowed to the drive circuit 2 does not flow to the zero volt line of the control circuit 3 for the diode 4, but flows to a zero voltage line N of an auxiliary power source. Thus, no noise is produced, and no erroneous operation occurs in the control circuit 3. |
