| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ringing choke converter in which voltage rise of a secondary main winding can be suppressed even if feedback is disabled. <P>SOLUTION: A ringing choke converter comprises a transformer T consisting of a primary main winding Np, a secondary main winding Ns and an auxiliary winding Na, a switching element 1 having a control terminal connected with one end of the primary main winding Np and one end of the auxiliary winding Na, a rectification and smoothing circuit 2 and a voltage detection circuit 4 connected with the secondary main winding Ns, a feedback control circuit 5 performing on/off control of the switching element 1, a diode 17 having a cathode connected with one end of the auxiliary winding Na, a Zener diode 18 having an anode connected with the anode of the diode 17 and a cathode connected with the control terminal of the switching element 1, and a capacitor 19 having one end connected with the joint of the diode 17 and the Zener diode 18 and the other end connected with the other end of the auxiliary winding Na. <P>COPYRIGHT: (C)2012,JPO&INPIT |
