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AN1596 Datasheet(PDF) 23 Page - STMicroelectronics |
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AN1596 Datasheet(HTML) 23 Page - STMicroelectronics |
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23 / 24 page  23/24 AN1596 - APPLICATION NOTE 8) Load dump D3 or RGND External suppressor Dld used for load dump > 40V. Alternative resistor RGND can be added to the ground pin to limit the current in the control part in case it exceeds the signal path breakdown voltage 9) Inductive loads: VCC disconnection D7 VCC disconnection occurs each time the ignition key is turned off and if the load is highly inductive. If current is too high, the device could be destroyed. In some extreme cases, a 40V MOV (D7) is necessary. 10) Inductive loads: GND pin pulled negative during switching off RGND RGND is necessary during fast demagnetization because it pulls down to zero the GND voltage. RGND suggested value is 1k Ω. + VCC VCC VOUT R1 R2 Dld R SENSE RGND CS INPUT DRIVER LOGIC + - DRIVER + LOGIC INPUT STATUS VCC DGND RGND V OUT R1 R2 D7 + - INPUT STATUS VCC DGND RGND V OUT R1 R2 DRIVER + LOGIC + - |
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