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VNH7040AY Datasheet(PDF) 32 Page - STMicroelectronics

Part # VNH7040AY
Description  Automotive fully integrated H-bridge motor driver
PDF  48 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VNH7040AY Datasheet(HTML) 32 Page - STMicroelectronics

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Reverse battery protection
VNH7040AY
32/48
DocID028118 Rev 5
6
Reverse battery protection
The picture below shows a P-Channel MOSFET connected to the VCC pin.
Figure 18. P-channel MOSFET connected to the VCC pin
In normal operation the Zener diode plus the resistor generate a gate-source voltage
enough to switch on the P-MOSFET. In case of reverse battery polarity: the P-Ch is
switched off since its gate voltage is low. No current can flow in this state.



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