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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4376 датащи(PDF) 27 Page - STMicroelectronics |
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AN4376 датащи(HTML) 27 Page - STMicroelectronics |
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27 / 37 page  DocID025380 Rev 1 27/37 AN4376 PFC waveforms 37 7.5 OVP protection and no load behavior During a load disconnection the HVLED815PF device senses the output voltage through the DMG pin and controls the voltage loop in order to regulate the output capacitor voltage to a level below its maximum rating (100 V) (see the HVLED815PF datasheet [1. in Section 8: Supporting material on page 36]). As shown in Figure 35 and Figure 37 the converter works in a burst mode during no load condition. No current is flowing into the LED load. Figure 34. Load disconnection at 100 VAC - 50 Hz Figure 35. No load behavior at 100 VAC - 50 Hz CH1: DRAIN CH2: IOUT CH3: VOUT CH4: DMG CH1: DRAIN CH2: IOUT CH3: VOUT CH4: DMG Figure 36. Load disconnection at 230 VAC - 50 Hz Figure 37. No load behavior at 230 VAC - 50 Hz CH1: DRAIN CH2: IOUT CH3: VOUT CH4: DMG CH1: DRAIN CH2: IOUT CH3: VOUT CH4: DMG |
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