Synchronous rectifier driver circuit, integrated circuit, resonant converter and method

• Main Authors: MAURIZIO FORESTA, NOVOTNY JOSEF, IORIO ALBERTO, EMILIO VOLPI
• Format: Patent
• Language: Chinese; English
• Published: 22.04.2022
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The synchronous rectifier driver circuit is configured to drive a synchronous rectifier FET and includes a first terminal configured to be connected to a source terminal of the synchronous rectifier FET. The second terminal is configured to be connected to a drain terminal of the synchronous rectifier FET, and the third terminal is configured to be connected to a gate terminal of the synchronous rectifier FET. The synchronous rectifier driver circuit is configured to measure a voltage between the second terminal and the first terminal, and detect an on-time at which the measured voltage reaches a first threshold, and an off-time at which the measured voltage reaches a second threshold. Depending on the measured voltage, the synchronous rectifier driver circuit generates a drive signal between the third terminal and the first terminal. 同步整流器驱动器电路被配置为驱动同步整流器FET，并且包括第一端子，第一端子被配置为连接到同步整流器FET的源极端子。第二端子被配置为连接到同步整流器FET的漏极端子，并且第三端子被配置为连接到同步整流器FET的栅极端子。同步整流器驱动器电路被配置为测量第二端子和第一端子之间的电压，并且检测所测量的电压达到第一阈值的导通时刻、以及所测量的电压达到第二阈