6

Functional description

6.1

Inputs and outputs

The device is controlled through the following logic inputs:

•

EN: enable input, active high;

•

LIN: low-side driver inputs, active high;

•

HIN: high-side driver inputs, active high.

Table 9. Inputs truth table (applicable when the device is not in UVLO or SmartSD protection)

Input pins

Output pins

EN

LIN

HIN

LVG

HVG

L

X

X

OFF

OFF

H

L

L

OFF

OFF

H

H

L

ON

OFF

H

L

H

OFF

ON

Interlocking

H

H

H

OFF

OFF

Note:

X : Do not care.

The FAULT and OD pins are open-drain outputs.

The FAULT signal is set low in case VCC UVLO is detected, or in case the SmartShutDown comparator triggers

an event. It is only used to signal a UVLO or SmartSD activation to external circuits, and its state does not affect

the behavior of other functions or circuits inside the driver.

The OD behavior is explained in Section 6.5.

6.2

Deadtime

The deadtime feature, in companion with the interlocking feature, guarantees that driver outputs of the same

channel are not high simultaneously and at least a DT time passes between the turn-off of one driver's output and

the turn-on of the companion output of the same channel. If a deadtime longer than the internal DT is applied to

the LIN and HIN inputs by the external controller, the internal DT is ignored and the outputs follow the deadtime

determined by the inputs.

PWD5T60

Functional description

DS14558 - Rev 2

page 12/27