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本刊2003年第5期第11页刊登的《屡烧电源开关管与换错快恢复二极管有关》一文(以下简称《原文》)指出:三洋A3机芯开关电源中的VD517为自激振荡电路元件,如图1所示。开关变压器T511的①～②端自激振荡绕组感应产生的正反馈电压分为两路:
The article published in 2003 No. 5 page 11 published “repeatedly burning power switch tube and error recovery diode fast recovery” (hereinafter referred to as the “original”) pointed out that: Sanyo A3 core switching power supply in the VD517 self-oscillation circuit Components, as shown in Figure 1. Switching transformer T511 ① ~ ② side self-excited oscillation induced by the positive feedback voltage is divided into two: