March 2013

DocID14836 Rev 2

1/28

AN2795

Application note

VNI4140K load test report

Introduction

The tests described in this application note were carried out to check the VNI4140K

parameters and driving capabilities of different types of problematic loads such as bulb and

inductor.

The VNI4140K device is a quad high-side smart power state relay intended for driving four

independent resistive or inductive loads with built-in current limitation and thermal

shutdown.

Figure 1 shows the test configuration. The STEVAL-IFP006V1, based on the VNI4140K,

was chosen for the measurements. The parameters of the test were set as follows:

Power supply:

1. 10.5 V; 2. 24 V; 3. 36 V

Generator:

freq. = 1 Hz, duty cycle = 50%

Load:

1. bulb 24 V/15 W; 2. inductor 130 mH/48

Ω; 3. short-circuit.

Figure 1.Test block diagram

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