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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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R5975D датащи(PDF) 41 Page - STMicroelectronics |
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R5975D датащи(HTML) 41 Page - STMicroelectronics |
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41 / 47 page  DocID026878 Rev 1 41/47 R5975D Application information 47 Figure 27 shows the type III compensation network stabilizing the system with ceramic capacitors at the output (the optimum components value depends on the application). This configuration introduces two zeros and a low frequency pole in the designed bandwidth and so guarantees a proper phase margin. Figure 27. MLCC compensation network circuit 8.11 External soft-start network At startup, the device can quickly increase the current up to the current limit in order to charge the output capacitor. If soft ramp-up of the output voltage is required, an external soft-start network can be implemented, as shown in Figure 28. The capacitor C is charged up to an external reference through R and the BJT clamps the COMP pin. This clamps the duty cycle, limiting the slew rate of the output voltage. Figure 28. Soft-start network example |
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