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VNH7100AS

Application information

37

Figure 17. Suggested PCB layout

Note:

PCB layout recommendation:

Optimized connection (short) between Drain LSD and Source HSD

Optimized GNDa and GNDb connection (symmetric connection)

3.1

Reverse battery protection

Three possible solutions can be considered:

•

•

An N-channel MOSFET connected to the GND pin

•

In case the reverse battery protection is not present, the device sustains no more than -15 A

because of the two Body diodes of the Power MOSFETs. Additionally, in reverse battery

Series resistor must be inserted to limit the current sunk from the microcontroller I/Os. If

3.2

OFF-state open-load detection – External circuitry

dimensioning

The detection of an open-load in off state requires an external circuitry to be connected

For the detection it is necessary to put one network on each leg in case of Half Bridge

operation or one network on one of the output in case of full bridge (see Table 13: Off-state -

truth table).

R

V

IO s

V

CC

–

I

Rmax

------------------------------

=