| 摘要 |
A synchronizing circuitry for AC-DC switch mode power supplies includes a master control circuit connected to one or more slave control circuits through one or more communication interfaces. With the communication interfaces, the master control circuit and the slave control circuits can be connected using existing communication loops, so that when the master control circuit performs master-slave control on the slave control circuits, the slave control circuits have synchronous connection with the master control circuit, thereby mitigating electromagnetic interference that may happen during master-slave control, and effectively reducing noise. As a result, signal transmission is more efficient and master-slave control is more responsive. |
| 主权项 |
1. A synchronizing circuitry for AC-DC switch mode power supplies, the synchronizing circuitry comprising:
a master control circuit, having a first controller for controlling a switching frequency of a master power source, the first controller being connected to a first selector switch for selectively performing master-slave synchronous control, the first selector switch being further connected to a first connecting port and a second connecting port; at least one slave control circuit, having a second controller for controlling a switching frequency of a salve power source, the second controller being connected to a second selector switch for selectively performing master-slave synchronous control, the second selector switch being further connected to a third connecting port and a fourth connecting port; at least one communication interface, spanning between the first connecting port of the master control circuit and the fourth connecting port of the slave control circuit; whereby, as the communication interface connects the master control circuit and the slave control circuit, when the first selector switch and the second selector switch both select to perform master-slave control, the first controller works on the switching frequencies in the power supplies for synchronous control, and the master control circuit establishes synchronous connection with the slave control circuit, thereby achieving master-slave synchronous control. |
