VNH2SP30-E

Application information

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

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

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 will enter in stby mode as soon as the fault is cleared.

3.1

Reverse battery protection

Three possible solutions can be considered:

1.

2.

an N-channel MOSFET connected to the GND pin (see Figure 32: Typical application

circuit for DC to 20 kHz PWM operation short circuit protection on page 20)

3.

The device sustains no more than -30A in reverse battery conditions because of the two

body diodes of the power MOSFETs. Additionally, in reverse battery condition the I/Os of

Figure 33.

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

IN

A

IN

B

DIAG

A

EN

A

DIAG

B

EN

B

Iout

A

out

B

FAULT

A

(Internal Signal)

FAULT

B

(Internal Signal)

Normal

Operation

OUT

to V

CC

t

DEL

Fault Cleared

Stby (*)

Normal

Operation

OUT

to GND

t

DEL

Fault Cleared

Normal

Operation

Device Latched

Device Latched

Device Unlatched

IN

A

IN

B

DIAG

A

EN

A

DIAG

B

EN

B

Iout

A

out

B

FAULT

A

(Internal Signal)

FAULT

B

(Internal Signal)

Normal

Operation

OUT

to V

CC

t

DEL

Fault Cleared

Stby (*)

Normal

Operation

OUT

to GND

t

DEL

Fault Cleared

Normal

Operation

Device Latched

Device Latched

Device Unlatched