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| DRV8848_15 Datasheet, PDF (14/28 Pages) Texas Instruments – DRV8848 Dual H-Bridge Motor Driver | |||
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DRV8848
SLLSEL7 â OCTOBER 2014
www.ti.com
8.3.6.2 TSD
If the die temperature exceeds safe limits TTSD, all FETs in the H-bridge are disabled and the nFAULT pin is
driven low. After the die temperature has fallen to a safe level, operation automatically resumes. The nFAULT pin
is released after operation has resumed.
8.3.6.3 UVLO
If at any time the voltage on the VM pin falls below the UVLO falling threshold voltage, VUVLO, all circuitry in the
device is disabled, and all internal logic is reset. Operation resumes when VVM rises above the UVLO rising
threshold. The nFAULT pin is driven low during an undervoltage condition and is released after operation has
resumed.
Fault
VM undervoltage (UVLO)
Overcurrent (OCP)
Thermal shutdown (TSD)
Error Report
nFAULT unlatched
nFAULT unlatched
nFAULT unlatched
Table 2. Fault Handling
H-Bridge
Disabled
Internal Circuits
Shut down
Disabled
Operating
Disabled
Operating
Recovery
System and fault clears on recovery
System and fault clears on recovery and
motor is driven after time, tRETRY
System and fault clears on recovery
14
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