| 摘要 |
PURPOSE:To lead high and low power voltages by switching by applying a switching element to a switching regulator, and controlling ON/OFF the switching element in response to the switching of the operation mode. CONSTITUTION:A transistor 12 for switching a power voltage is inserted between the power input terminal 8 in a switching regulator and the secondary coil of a switching power transformer 3. ''H'' or ''L'' switching control signal is applied through a resistor 14 to the control input terminal 13 to the base of the transistor 12. High and low DC output voltages are led to the power output terminals 10, 10' in response to the ON/OFF of the transistor 12. |
