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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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DAP015A 데이터시트(PDF) 31 Page - STMicroelectronics |
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DAP015A 데이터시트(HTML) 31 Page - STMicroelectronics |
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31 / 39 page  DAP005 Brownout protection 31/39 If this is not the case or it is not possible to achieve a start-up delay long enough (because this prevents the DC-DC stage from starting up correctly) or, simply, the PWM controller is devoid of soft start, the arrangement of Figure 45 lets the DC-DC converter start up when the voltage generated by the PFC stage reaches a preset value. The technique relies on the UVLO thresholds of the PWM controller. In table 5 it is possible to find a summary of all of the above mentioned working conditions that cause the device to stop operating. Figure 44. Interface circuits that let the switch on or off a PWM controller Figure 45. Interface circuits for actual power-up sequencing (master PFC) DAP005 DAP005 DAP01A DAP015 DAP015 DAP01A DAP015 AC_OK DAP005 AC_OK |
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