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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6730B датащи(PDF) 20 Page - STMicroelectronics |
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L6730B датащи(HTML) 20 Page - STMicroelectronics |
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20 / 52 page  Device description L6730 - L6730B 20/52 Doc ID 11938 Rev 3 5.7 Driver section The high-side and low-side drivers allow for the use of different types of power MOSFETs (also multiple MOSFETs to reduce the RDSON), maintaining fast switching transitions. The low-side driver is supplied by VCCDR while the high-side driver is supplied by the BOOT pin. A predictive dead time control avoids MOSFETs cross-conduction maintaining very short dead time duration (see Figure 13.). The control monitors the phase node in order to sense the low-side body diode recirculation. If the phase node voltage is less than a certain threshold (–350 mV typ.) during the dead time, it will be reduced in the next PWM cycle. The predictive dead time control does not work when the high-side body diode is conducting because the phase node does not go Figure 12. Sink mode disabled: Inductor current during and after soft-start (L6730) Vout Vss Vcc IL |
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