VNH5019ATR-E datasheet(17/37 Pages) STMICROELECTRONICS

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VNH5019A-E

Electrical specifications

Doc ID 15701 Rev 9

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The fault conditions are:

●

overtemperature on one or both high-sides (for example, if a short to ground occurs as

it could be the case described in line 1 and 2 in the

Table 14);

●

Short to battery condition on the output (saturation detection on the low-side

Power MOSFET).

Possible origins of fault conditions may be:

●

OUTA is shorted to ground. It follows that, high-side A is in overtemperature state.

●

OUTA is shorted to VCC. It follow that, low-side Power MOSFET is in saturation state.

When a fault condition is detected, the user can know which power element is in fault by

monitoring the INA, INB, DIAGA/ENA and DIAGB/ENB pins.

In any case, when a fault is detected, the faulty leg of the bridge is latched off. To turn-on the

respective output (OUTX) again, the input signal must rise from low-level to high-level.

Figure 6.

Behavior in fault condition (how a fault can be cleared)

Note:

In case of the fault condition is not removed, the procedure for unlatching and sending the

device in Stby mode is:

- Clear the fault in the device (toggle: INA if ENA=0 or INB if ENB=0)

- Pull low all inputs, PWM and Diag/EN pins within tDEL.

If the Diag/En pins are already low, PWM=0, the fault can be cleared simply toggling the

input. The device enters in stby mode as soon as the fault is cleared.

VNH5019ATR-E Datasheet(PDF) 17 Page - STMicroelectronics