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DRV8803 Fiches technique(PDF) 8 Page - Texas Instruments

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No de pièce DRV8803
Description  QUAD LOW-SIDE DRIVER IC
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

DRV8803 Fiches technique(HTML) 8 Page - Texas Instruments

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DRV8803
SLVSAW5A
– JULY 2011 – REVISED JULY 2011
www.ti.com
Protection Circuits
The DRV8803 is fully protected against undervoltage, overcurrent and overtemperature events.
Overcurrent Protection (OCP)
An analog current limit circuit on each FET limits the current through the FET by removing the gate drive. If this
analog current limit persists for longer than the tOCP deglitch time (approximately 3.5 µs), the driver will be
disabled and the nFAULT pin will be driven low. The driver will remain disabled for the tRETRY retry time
(approximately 1.2 ms), then the fault will be automatically cleared. The fault will be cleared immediately if either
RESET pin is activated or VM is removed and re-applied.
Thermal Shutdown (TSD)
If the die temperature exceeds safe limits, all output FETs will be disabled and the nFAULT pin will be driven low.
Once the die temperature has fallen to a safe level, operation will automatically resume.
Undervoltage Lockout (UVLO)
If at any time the voltage on the VM pin falls below the undervoltage lockout threshold voltage, all circuitry in the
device will be disabled, and internal logic will be reset. Operation will resume when VM rises above the UVLO
threshold.
8
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© 2011, Texas Instruments Incorporated
Product Folder Link(s): DRV8803


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