VN610SP-E(2013) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VN610SP-E
(Rev.:2013)

Single channel high-side driver

STMicroelectronics 

Application information

VN610SP-E

3.1.2

If the calculated power dissipation requires the use of a large resistor, or several devices

have to share the same resistor, then ST suggests using solution 2 below.

Solution 2: a diode (DGND) in the ground line

A resistor (RGND = 1kΩ) should be inserted in parallel to DGND if the device is driving an

inductive load. This small signal diode can be safely shared amongst several different HSD.

Also in this case, the presence of the ground network produces a shift (j600mV) in the input

threshold and the status output values if the microprocessor ground is not common with the

device ground. This shift not varies if more than one HSD shares the same diode/resistor

network. Series resistor in INPUT and STATUS lines are also required to prevent that,

during battery voltage transient, the current exceeds the Absolute Maximum Rating. Safest

configuration for unused INPUT pin is to leave them unconnected, while unused SENSE pin

has to be connected to ground pin.

3.2

Load dump protection

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

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

line that are greater than those shown in the ISO T/R 7637/1 table.

3.3

MCU I/O protection

If a ground protection network is used and negative transients are present on the VCC line,

the control pins is pulled negative. ST suggests to insert a resistor (Rprot) in line to prevent

the µC I/O pins from latching 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 of µC

I/Os:

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

Example

For the following conditions:

VCCpeak = - 100V

Ilatchup ≥ 20mA

VOHμC ≥ 4.5V

5kΩ ≤ Rprot ≤ 65kΩ.

Recommended values are:

Rprot = 10kΩ

18/27

Doc ID 10889 Rev 5

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