VNH7040AY datasheet(6/48 Pages) STMICROELECTRONICS

6 / 48 page

Block diagram and pin description

VNH7040AY

6/48

DocID028118 Rev 5

Block diagram and pin description

Figure 1. Block diagram

Table 1. Block description

Name

Description

Logic control

Allows the turn-on and the turn-off of the high-side and the

low-side switches according to the truth table.

Undervoltage

Shuts down the device for battery voltage below (4 V).

High-side and low-side clamp voltage

Protect the high-side and the low-side switches from high

voltage on the battery line.

High-side and low-side driver

Drive the gate of the concerned switch to allow a proper

RDS(on) for the leg of the bridge.

Current limitation

Limits the motor current in case of short circuit.

High-side and low-side

overtemperature protection

In case of short-circuit with the increase of the junction

temperature, it shuts down the concerned driver to prevent

degradation and to protect the die.

Low-side overcurrent detector

Detects when low-side current exceeds shutdown current

and latches off the concerned low-side.

Fault detection

Signalizes an abnormal condition of the switch (output

shorted to ground or output shorted to battery) by a feedback

on the MultiSense

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