Sequence to enter stand-by mode

Sequence to exit stand-by mode

INA, INB, SD, BRAKE

Device status

Output

ACTIVE

STAND-BY

SAFE-STATE

ACTIVE

“stand-by”

“stand-by”

duration too short

Device status

Output

ACTIVE

STAND-BY

SAFE-STATE

ACTIVE

ACTIVE

ACTIVE

“stand-by”

“stand-by”

“stand-by”

“stand-by”

duration

too short

duration too long

INA = INB = BRAKE = HIGH

is any different combination

SD = LOW

“stand-by”:

{

INA, INB, SD, BRAKE

5.7

Interlocking function

The interlocking function prevents outputs GOUT_A and GOUT_B from being high at the same time, regardless

of the status of the input pins INA and INB.

In half-bridge topologies this protection avoids shoot-through in case that wrong input signals are generated by

the controller device. In case the status of INA and INB is such to require both channels to be ON at the same

time, the driver turns both channels off.

In some topologies it is required to allow both channels to be ON at the same time: this can be achieved by

disabling the interlocking function trough the iLOCK pin. The iLOCK pin shall be either connected to VDD, which

enables the interlocking function, or to GND, which disables the interlocking function and allows parallel operation

of Channel_A and Channel_B.

Refer to Section 5.3 for complete logic inputs truth table.

STGAP2D

Interlocking function

DS12746 - Rev 3

page 10/22