VNQ600AP datasheet(10/18 Pages) STMICROELECTRONICS

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VNQ600AP

LOAD DUMP PROTECTION

Dld is necessary (Voltage Transient Suppressor) if the

load dump peak voltage exceeds VCC max DC rating. The

same applies if the device will be subject to transients on

the VCC line that are greater than the ones shown in the

ISO T/R 7637/1 table.

µC I/Os PROTECTION:

If a ground protection network is used and negative

transients are present on the VCC line, the control pins will

be pulled negative. ST suggests to insert a resistor (Rprot)

in line to prevent the

µC I/Os pins to latch-up.

The value of these resistors is a compromise between the

leakage current of

µC and the current required by the

HSD I/Os (Input levels compatibility) with the latch-up limit

µC I/Os.

-VCCpeak/Ilatchup ≤ Rprot ≤ (VOHµC-VIH-VGND) / IIHmax

Calculation example:

For VCCpeak= - 100V and Ilatchup ≥ 20mA; VOHµC ≥ 4.5V

Ω ≤ R

prot ≤ 6kΩ.

Recommended Rprot value is 5kΩ.

0.5

1.5

2.5

3.5

4.5

3000

3500

4000

4500

5000

5500

6000

6500

min.Tj=-40°C

max.Tj=-40°C

min.Tj=25...150°C

max.Tj=25...150°C

typical value

Figure 3: IOUT/ISENSE versus IOUT

IOUT/ISENSE

IOUT (A)

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