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L9779WD 데이터시트(PDF) 45 Page - STMicroelectronics

부품명 L9779WD
상세설명  Multifunction IC for engine management system
PDF  170 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9779WD 데이터시트(HTML) 45 Page - STMicroelectronics

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L9779WD
Functional description
169
6.7
Charge pump
The L9779WD charge pump could be active if the battery supply voltage is smaller than
12 V or be permanently active by setting the capful bit enable or disable. Charge pump
provides a permanent voltage of at least 5 V above Ubat when Ubat is higher than 6 V with
an external load current at pin CP of 50 µA additional to the L9779WD internal loads.
Once Ubat overvoltage is detected (VB_OV_th > 28 V), the charge pump will be switched
off automatically no matter the cp_off bit status.
Figure 19. VDD5 overvoltage diagram



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