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ISO808ATR Folha de dados(PDF) 24 Page - STMicroelectronics

Nome de Peças ISO808ATR
Descrição Electrónicos  Galvanic isolated octal high-side power solid state relay with SPI interface for high inductive loads
PDF  38 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ISO808ATR Folha de dados(HTML) 24 Page - STMicroelectronics

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9
Reverse polarity on VDD
The reverse polarity on VDD can be implemented on board by placing a diode between the GNDDD pin and GND
digital ground.
The diode must be chosen by taking into account VRRM>|VDD| and its power dissipation capability:
PD≥IDD×VF
(4)
Note:
In normal operation (no reverse polarity), there is a voltage drop (ΔV = VF@(Idd)) between GNDDD of the device
and digital ground of the system. In order to guarantee to proper
triggering of the input signal, ΔV(max.) must result lower than VIH(MIN).
Figure 24. VDD reverse polarity protection
Note:
Input(i) is intended as any input pin on logic side.
ISO808A, ISO808A-1
Reverse
polarity on VDD
DS14170 - Rev 1
page 24/38



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