L5963 datasheet(24/49 Pages) STMICROELECTRONICS

24 / 49 page

Functional Description

L5963

24/49

DocID028553 Rev 3

Thermal protection

The HSD has an independent thermal shutdown protection.

If the local die temperature exceeds the thermal shutdown detection threshold, the HSD is

disabled. It is enabled once the local die temperature falls below the detection threshold with

the specified hysteresis. The invoking of thermal shut down on HSD does not directly affect

any other outputs or circuitry in the IC.

Short to ground

The high side driver output is protected against shorts to ground. The faulted output returns

to its pre-fault operating condition once the fault is removed.

Short to supply

The high-side driver is protected against shorts to battery. In such an event, the IC is not

damaged. External components connected directly to the IC are not damaged by such

exposure.

Loss of ground protection

The high side driver is protected against excessive leakage current to an external ground

during a loss of supply ground (i.e. ground is open). During this event, the HSD is disabled

and the IC is not damaged.

Loss of battery protection (Unpowered shorts to battery, SPU)

The high-side driver is protected against unpowered shorts to battery. In such an event, in

typical applicative conditions, the IC will not suffer any damage.

Below-ground protection

The HSD output can be brought below ground by the inductive load. In this case, Power

PMOS is turned on to charge the output, protecting itself.

L5963 Datasheet(PDF) 24 Page - STMicroelectronics