What isolation safety approvals are required for digital isolators or optocoupler chips

Introduction:

This article mainly introduces the digital isolator or optocoupler chips need to obtain which isolation safety certification, when the isolation device is developed or completed before the project, you should first consider how the product through the isolation voltage safety certification, now on the market there are a number of different countries and organizations have introduced isolation safety certification standards, including UL, CSA, VDE, TÜV, CQC, ATEx, ATEx, IECEx, UKEx and other organizations. UL, CSA, VDE, TÜV, CQC, ATEx, IECEx, UKEx and other organizations:

• Underwriters Laboratories (UL)
• Canadian Standards Association (CSA)
• Association for Electrical, Electronic and Information Technology (VDE)
• Technical Inspection Unit (TUV)
• China Quality Certification Center (CQC)

Here's a preview of which safety certification requirements your digital isolator product should meet.

List of safety certification standards for isolated voltage:

The table below lists the isolation voltage safety certification standards that most digital isolator manufacturers are required to pass in order to assess test and certify the electrical insulation strength of the isolation equipment we produce. For a detailed description of each certification standard, you can click on the standard number for more information.EUTTEST also lists the type of standard, which describes the range of products to which this standard applies, so please prioritize the satisfaction of this certification standard when your product will eventually be used in this type of product.

Detailed test items for each of the above guarantees can be found by clicking on the standard number in the first column, which will be continuously updated by EUTTEST.

How to choose the right high voltage isolation certification standard for your product?

Determine the scope of utilization of digital isolators:

Before we understand this, let's take a look at the following chart, which is a product overview chart of one of the world's leading digital isolator manufacturers.

In order to adapt the digital isolator to different industries, you need to determine the final application of the digital isolator before development, for example, for the automotive industry, the integrated circuit industry, cost-sensitive industries, and their harsh industrial environments, etc. These different industries determine that the digital isolator ultimately needs to face different operating conditions, including high-voltage, high-speed, low-power, small size, integrated power supply, radiation resistance etc.

Determining the scope of utilization of digital isolators

Getting customer needs (mostly):

Digital isolators or optocoupler chips are inevitably sold to other customers after production. For example, if your customers require your products to pass the isolation withstand voltage test of 10kVrms of UL1577 and the partial discharge test of 5kV rms of VDE0884-11, you can use the isolation voltage and partial discharge tester HARRIS. TUVEY HT9460 (discontinued),HT9464or use Torquil's HT9464MThese devices are capable of testing your company's digital isolators for leakage current as well as partial discharge charge.

In short, please make sure that the needs presented by the customer are the first element.

Refer to proven products from other manufacturers:

When our customers do not make any requirements, we need to understand the competitor's digital isolator products to see what certification standards requirements their products have gone through, and then we can test them according to their goals, so that in the end, we can claim to meet and can be used as an alternative to a certain product from a certain company, but please do not compete in bad faith.

As shown below, the company offers products that meet different isolation safety certification standards, all in an effort to provide customers with more choice.

Products complying with different isolation safety certification standards

In addition, the company defines digital isolator products with different test specifications such as number of channels, communication rate, surge isolation voltage, withstand isolation voltage, CMTI, package, etc. for customers to choose. In other words, even with the same certification standard, you can test different isolation voltages for your products and then isolate more digital isolator products for different industries.

Digital Isolator products with different test specifications

Finally, let's look at another company's products. Like the company mentioned above, they also use different certification standards for different products.

Digital Isolator products of a company certified to different isolation voltage standards

Summary:

So, now we can know how to choose the high voltage isolation certification standard suitable for our own products. Now the country has begun to have a lot of companies began to research and development and mass production of digital isolator products with excellent performance, we, as a latecomer, should be clear about the positioning of their products, and then in accordance with the above ideas to determine how your own products should be designed. In short, customer demand is the first, when the customer demand you should give priority to meet; if not, you can get competitors' product information, against their products to design your digital isolator or optocoupler (optocoupler) devices, and then beyond them.