STSR30 데이터 시트보기 (PDF) - STMicroelectronics

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STSR30

SYNCHRONOUS RECTIFIER SMART DRIVER FOR FLYBACK

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STSR30

Figure 3 : STSR30 SYNCHRONIZATION TECHNIQUE

The synchronization is based on the revelation of the low level of the drain voltage of the synchronous rectifier. To avoid false triggering of

the device during discontinuous mode, it is important that the lowest level of the ringing must be higher than the Ck threshold. Diode D3 and

resistor R3 keep the Ck signal to high level even during the ringing. OUTGate is the complementary signal of the Ck with proper dead time

setting to avoid cross-conduction.

Figure 4 : INHIBIT OPERATION OF OUTGATE IN DISCONTINUOUS CONDUCTION MODE

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