| 摘要 |
PURPOSE:To eliminate the fluctuation of the maximum duty of an inverter circuit and improve the use of the transformer of the circuit, and then, to reduce the size of the circuit. CONSTITUTION:In an inverter circuit which transforms an input voltage by means of a transformer 31, compares a rectified and smoothed output voltage with a reference voltage, and controls the turning on/off of a switching element 52 which drives the transformer 31 in accordance with the compared results, an integration circuit 53 is connected to the ternary winding 34 of the transformer 31 and, when the output voltage of the circuit 53 exceeds a specific value, the element 52 is turned off. |
