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R5973D 데이터시트(PDF) 33 Page - STMicroelectronics |
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R5973D 데이터시트(HTML) 33 Page - STMicroelectronics |
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33 / 39 page ![]() DocID026876 Rev 1 33/39 R5973D Application information 39 8.9 External SOFT_START network At start-up 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 22. 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 22. Soft-start network example |
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