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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6460 датащи(PDF) 54 Page - STMicroelectronics |
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L6460 датащи(HTML) 54 Page - STMicroelectronics |
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54 / 139 page  Switching regulator controller L6460 54/139 Doc ID 17713 Rev 1 13.2 Output equivalent circuit The switching regulator controller output driving stage can be represented with an equivalent circuit as in the Figure 13: Figure 13. Switching regulator controller output driving: equivalent circuit As can be seen from the above figure, the external switch gate is charged with a current generator ISOURCE and it is discharged towards ground with a current generator ISINK that is applied for a TSINK pulse while an equivalent resistor RSUSTAIN is connected between gate and source until the sink command is present. 13.3 Switching regulator controller application considerations This controller can implement a step-down switching regulator used to provide a regulated voltage in the range 0.8 V – 32 V. Such kind of variation could be managed by considering some constraints in the application and particularly by choosing the correct feedback reference voltage as indicated in the Table 13. VSWDRV_gate VPUMP ISOURCE VSWDRV_SW RSUSTAIN Source command Sink pulse command ISINK Sink command Tsink Table 13. Switching regulator controller application: feedback reference Output regulated voltage range Feedback voltage reference 0.8V ≤ V out < 5V 0.8V - 1V 5V ≤ V out ≤ 32V 2.5V - 3V |
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