VND5E008ASP-E datasheet(20/33 Pages) STMICROELECTRONICS

Part #	VND5E008ASP-E

Description	Double channel high-side driver with analog current sense for automotive applications

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Application information

VND5E008ASP-E

20/33

DocID023813 Rev 4

3

Application information

Figure 15. Application schematic

Note:

Channel 2 has the same internal circuit as channel 1.

3.1

Load dump protection

Dld is necessary (voltage transient suppressor) if the load dump peak voltage exceeds the

VCC max DC rating. The same applies if the device is subject to transients on the VCC line

that are greater than the ones shown in the ISO 7637-2 2004 (E) table.

3.2

MCU I/Os protection

When negative transients are present on the VCC line, the control pins are pulled negative to

approximatly -1.5 V. ST suggests to insert a resistor (Rprot) in line to prevent the

microcontroller I/O pins from latching-up.

The value of these resistors is a compromise between the leakage current of microcontroller

and the current required by the HSD I/Os (Input levels compatibility) with the latch-up limit of

microcontroller I/Os.

Equation 1

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

Calculation example:

For VCCpeak = -1.5 V and Ilatchup ≥ 20 mA; VOHμC ≥ 4.5 V

75

Ω ≤ Rprot ≤ 240 kΩ.

Recommended values: Rprot = 10 kΩ, CEXT = 10 nF.

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