知搜-全球专利检索

  1. 登录
  2. 注册
发明授权
CN107819402B 开关驱动电路和使用其的开关电源设备 有权

开关驱动电路和使用其的开关电源设备
摘要：
一种开关驱动电路驱动连接到变压器的全桥输出级，从而在将第一方向的激励电流提供给变压器的第一循环与将第二方向的激励电流提供给变压器的第二循环之间进行交替切换。开关驱动电路包括例如根据第一循环和所述第二循环中的一个循环中流动的激励电流的大小来设置全桥输出级的同时断开时间的模式，该同时断开时间成为另一循环的操作变化因子。或者开关驱动电路包括例如根据通过将第一和第二循环中流动的激励电流进行平均而获得的平均激励电流的大小来设置全桥输出级的同时断开时间的模式。或者，开关驱动电路根据操作模式切换信号在这些模式之间进行切换。
摘要（英）：

A switch drive circuit drives a full-bridge output stage connected to a transformer to alternately switch between a first cycle in which a current in a first direction is supplied to the transformer and a second cycle in which a current in a second direction is supplied to the transformer. The switch drive circuit includes a mode in which a dead time of the output stage is set in accordance with a magnitude of a current flown in one of the first and second cycles, the dead time becoming an operation changing factor in the other cycle. Or, the switch drive circuit includes a mode in which the dead time of the output stage is set in accordance with a magnitude of an average current obtained by averaging currents flown in the first and second cycles. Or, the switch drive circuit switches between these modes in accordance with a signal.

公开/授权文献
0/0