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AN4068 Datasheet(PDF) 50 Page - STMicroelectronics

Part # AN4068
Description  ST7580 power line communication system-on-chip design guide
PDF  63 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4068 Datasheet(HTML) 50 Page - STMicroelectronics

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AN4068
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Doc ID 022923 Rev 2
Figure 41.
Scheme of principle for switched 3-phase architecture
For the zero crossing coupling, even if only one phase at a time can be used as reference,
the possibility to switch to another phase is required in case of a fault on the reference line.
This can be achieved through one of the suggested circuits in Figure 42 and 43.
The external host must control the LCA715 opto-relays according to the phase status
information provided by the measurement circuitry. The host controller is also responsible
for ensuring that only one opto-relay is turned on, therefore guaranteeing isolation between
the three phases.



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