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STV6889 数据表(PDF) 44 Page - STMicroelectronics |
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STV6889 数据表(HTML) 44 Page - STMicroelectronics |
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44 / 56 page  STV6889 44/56 Table 9. IDC/DC controller Off-to-On edge timing Figure 16. DC/DC converter controller block diagram BOutPh (Sad07h/D7) BOHEdge (Sad17h/D3) Timing of Off-to-On transition on BOut output 0 1 VCO ramp top at Horizontal frequency divided by two 0 0 Middle of H-flyback plus tBTrigDel 1 0 Falling edge of H-drive signal 1 1 Rising edge of H-drive signal N type Soft start H-drive edge H-fly-back + - + - + - ~500ns Monostable P type Feedback C2 (I²C) B-drive inhibition (I²C) (+delay) (I²C) 2R R VBReg I1 I2 I3 VC2 O1 ¸2 28 BOut 16 BISense 10 HPosF 14 BComp 15 BRegIn BOutPol BOutPh BOHEdge VThrBIsCurr VCO 1 0 1 0 1 0 VCC C1 S Q R (safety functions) timing + - B-drive protection at H-unlock (safety functions) C3 Safety block |
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