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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS3701 датащи(PDF) 14 Page - ams-OSRAM AG |
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AS3701 датащи(HTML) 14 Page - ams-OSRAM AG |
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14 / 110 page  ams Datasheet Page 13 [v1-11] 2016-Dec-14 Document Feedback AS3701 − Detailed Description – Power Management Functions High-Efficiency Operation (Default Setting) High-efficiency operation is enabled by setting the bit sd_low_ noise [SD_control1] to 0. In this mode there is a minimum coil current necessary before switching OFF the PMOS. Resultant there are less pulses necessary at low output loads, and therefore the efficiency increases. As drawback, this mode increases the ripple up to a higher output current. Figure 13: Switching Behavior at Operating Point 1 Operating Point 1: These graphs show the switching behavior referring to the operating point 1 from figure10. Here the mode is set to high efficiency operation and the DCDC is in skipping mode at 2mA load current. Here a minimum coil current during the PMOS ON time is needed, hence more energy can be stored, the duration between the bursts is longer and the efficiency increases. Figure 14: Output Voltage Ripple Measurement at Operating Point 3 Operating Point 3: These graphs show the switching behavior referring to the operating point 3 from figure10. Here the mode is set to high efficiency operation and comparing to operating point 4 the DCDC is still in skipping mode at 10mA load current and keeps the efficiency higher. |
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