ITECH’s automotive electronics test solution based on DIN40839 and ISO16750-2

IT6500 series DC power supply built-in international test standard voltage curve

In order to facilitate the testing of related products in the automotive electronics industry and provide a unified test standard, the International Organization for Standardization provides a series of voltage transient waveform test templates to simulate voltage waveforms under various conditions. To predict the voltage transient waveform of automobiles in various operating environments, engineers can test the DUT in the laboratory according to the voltage waveform defined by the template to judge whether their products can meet the requirements. For example, the German standard DIN40839 standard automotive power grid voltage curve and the international standard ISO-16750-2 pulse waveform are the two most popular unified test standards in the automotive electronics industry. Therefore, in order to make the testing of automotive electronics and even the entire automotive electronics industry more standard and accurate, so as to eliminate potential safety hazards for automobiles, ITECH has also been committed to the research of testing instruments for testing related products in the field of automotive electronics, and has developed a A high-power DC power supply series product that can simulate the German DIN40839 standard automotive power grid voltage curve and the international standard ISO-16750-2 pulse waveform – IT6500 DC power supply series.

German DIN40839 standard automotive power grid voltage curve

DIN40839 is the standard voltage curve for automotive power grids used in relevant tests in the automotive electronics industry promulgated by Germany, the world leader in automotive electronics. After Germany promulgated this standard, manufacturers in the global automotive electronics industry have followed suit. A standard automotive power grid voltage curve is used in various related tests.

For example, in the test of car engine startup, the voltage provided by the engine on the car drops instantly. In this case, if the battery on the car cannot withstand the shock of this voltage drop, it will stop working, and because the voltage is falling The speed is also very fast, and it becomes a difficult problem to simulate the voltage waveform when the car engine is started. When engineers are doing this test, if ITECH IT6500 series DC power supply is used, the built-in German DIN40839 standard automotive power grid voltage curve can completely solve this problem. Engineers can also set the curve in the IT6500 DC power supply, and use the list mode provided by the IT6500 series DC power supply to edit and modify the waveform according to their actual needs, so as to meet the experimental requirements.

The waveform diagram of IT6500 series DC power supply simulating the electrical test of automobile engine startup is as follows:

ITECH IT6500 series DC power supply built-in DIN40839 waveform

When engineers use this waveform for related tests, it can adjust its rising and falling slopes, and its voltage rise speed can reach very high, and the voltage can rise from 0V to 20V within 2ms. At the same time, for more convenient testing, you can also make full use of the various analog interfaces and master-slave series-parallel mode of the IT6500 series DC power supply.

ISO-16750-2 international standard pulse waveform

The ISO-16750-2 document is one of the ISO-16750-2 documents that provide a series of templates for voltage transient waveform testing in the automotive electronics industry to simulate voltage waveforms under various conditions. How does it apply in specific tests? What’s the use? In general, the waveforms contained in the ISO-16750-2 document can be used for immunity experiments of automotive electrical and Electronic equipment. The following are specific applications:

(1) Influence of instantaneous voltage drop on automotive electronic equipment

In automobile circuits, when one of the circuits fails, the fuse will blow, so the voltage of the power supply equipment of other circuits will drop in an instant, and if the electronic equipment in the circuit cannot withstand this voltage The impact caused by the drop will cause the equipment in it to not be used normally, thereby affecting the normal operation of the car and on-board electronics.

When engineers are conducting related tests, they can use the ISO-16750-2 international standard pulse waveform built into the IT6500 series DC power supply to conduct tests. This pulse waveform simulates the instantaneous voltage dip caused by the melting of a conventional fuse element in another circuit, and uses this fully simulated situation to test the electronics on the car. The following is the waveform diagram of the IT6500 series DC power supply during this test:

ITECH IT6500 series DC power supply built-in ISO-16750-2 waveform (1)

It is not difficult to see from this waveform diagram that the voltage drops instantaneously and then returns to its original position in a very short period of time from 10s to 10.1s, which truly simulates the actual situation and can fully meet the test of the impact of instantaneous voltage drop on automotive electronic equipment.

(2) The influence of different voltage dips on automotive electronic equipment with reset function

Various devices in a car are intricate, some of which have reset functions, such as microcontrollers commonly used in automotive electronics. Just imagine, if an automotive electronic device equipped with one or more microcontrollers cannot be reset normally, then of course the device will not be able to operate, which will also pose a security threat. Therefore, the detection of the reset performance of the device has also become an extremely important experiment in many tests in the automotive electronics industry.

In this test, engineers can use the IT6500 series DC power supply to simulate different voltage sag curves to test the reset performance of automotive electronic equipment under different voltage sags. The waveforms are as follows:

ITECH IT6500 series DC power supply built-in ISO-16750-2 waveform (2)

It can be seen here that during this test, the voltage waveform simulated by IT6500 series DC power supply is a regular gradient curve. Hold for 10s for functional test; then the voltage drops again, and so on, to ensure that the reset function of the device under test is fully verified.

(3) Characteristics of electronic equipment when the car is started and after it is started

When the car starts up, its real voltage transient is not carried out with a completely linear waveform. In the ISO-16750-2 international standard pulse waveform, the AC voltage waveform curve with superimposed frequency is used to achieve a more realistic Simulates the DC voltage with ripple under the DC power supply when the car starts, so as to detect the behavior of the electronic equipment on the car during and after the car starts in this highly simulated situation. IT6500 series DC power supply can do exactly this. The following figure shows the waveform of the IT6500 series DC power supply during this test:

ITECH IT6500 series DC power supply built-in ISO-16750-2 waveform (3)

In the t8 time period in the figure, the voltage curve is a curve containing an AC voltage waveform with a superimposed frequency of 2Hz. Using this curve, it is possible to more realistically simulate the impact of the DC voltage with ripple on the car under the DC power supply when the car is started. Effects of electronic equipment performance.

Summarize

Vehicles integrate safety and comfort, so the detection of automotive electronic equipment is very critical. ITECH IT6500 series DC power supply has built-in German standard DIN40839 standard automotive power grid voltage curve and international standard ISO-16750-2 Pulse waveform is the preferred power supply test instrument in the automotive electronics industry. In addition, ITECH IT6500 series DC power supplies have high voltage and the widest voltage and current utilization ratio of similar products, and are widely used in electronic equipment testing in automotive electronics and other electronic industries. For example, its built-in various standard communication interfaces and analog interfaces can meet the needs of various communication and industrial control. It can be seen that the IT6500 series DC power supply can complete various tests with ease, providing engineers with a great tool for equipment selection. Good choice.