Date：2021-09-13 16:03:00

Now ROHS certification has been upgraded to rohs2 0, not only the EU ROHS has been upgraded, but also China's RoHS has been upgraded to rohs2. There are ten RoHS tests, which can be generally divided into four, six and ten. RoHS1. 0 is the old version 2002 / 95 / EC, rohs2 0 is the current 2011 / 65 / EU, the revision is 2015 / 863, not rohs3 0 EU rohs2 How many items are detected in 0? 2011 / 65 / EC Directive is changed to rohs10 items: lead (PB), cadmium (CD), mercury (Hg), hexavalent chromium (Cr6 +), polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs), di-n-butyl phthalate (DBP), o-benzene View >>

Date：2021-09-13 15:52:00

With the rapid growth of electronic and electrical equipment, a large number of electronic waste is also increasing rapidly. In order to control the pollution of electronic and electrical waste to the ecological environment, different countries or regions have promulgated relevant laws and regulations to control it. Among them, the EU directive rohs2 on the restriction of 10 categories of hazardous substances in motor and electronic products 0. From July 22, 2019, all electronic and electrical products exported to Europe (except medical and monitoring equipment) shall meet this restriction. RoHS is the environmental protection certificate for products and materials entering the EU market. This directive is a mandatory requirement. Products or materials involved in this directive will not be able to enter the market without ROHS environmental protection certificate. RoHS2. The implementation of 0 is related to the interests of electronic and electrical appliance manufacturers exporting to the EU, so let's take a look today View >>

Date：2021-09-13 15:15:00

IGBT is a composite fully controlled voltage driven power semiconductor device composed of bipolar transistor and insulated gate field effect transistor. It has two advantages: high input impedance of MOSFET and low on voltage drop of GTR. View >>

Date：2021-09-13 15:12:00

When a small amount of impurities are doped into a semiconductor, the periodic potential field near the impurity atom is disturbed, forming an additional bound state and generating an additional impurity level in the band gap. The impurity that can provide electron carriers is called donor impurity, and the corresponding energy level is called donor energy level, which is located above the forbidden band and near the bottom of the conduction band. View >>

Date：2021-09-13 11:21:00

Performance test generally refers to function test. It mainly tests the functions of the equipment and whether the fixed parameters meet the regulations. Performance test is to test various performance indexes of the system by simulating a variety of normal, peak and abnormal load conditions through automatic test tools. Both load test and stress test belong to performance test, which can be carried out in combination. Function test is to verify the functions of the product, test item by item according to the function test cases, and check whether the product meets the functions required by users. View >>

Date：2021-09-13 11:14:00

Chip burning is an important link in the production of electronic products. The efficiency is an important aspect of customer concern. How to judge whether the IC has been burned? The burning efficiency is inseparable from the burning speed of the chip. The principle of chip programming is explained. The principle of single chip microcomputer burning is that a burning program already exists in single chip microcomputer. When starting the single chip microcomputer, first run the program to judge the port state. If the state of "to burn ROM" exists, read the data from a port (serial port, SPI, etc.) and then write it into the ROM of the single chip microcomputer. If there is no "to burn ROM" status, go to the user's program and start execution. View >>

Date：2021-09-10 17:16:35

IC is an integrated circuit, referred to as chip for short. All enterprises engaged in the production of electronic products will use IC, but IC is divided into active chips that need to be burned and passive chips that do not need to be burned. In all cases where active chips are needed, IC burning is required. However, if the general chip is not a single chip microcomputer or programming chip, it does not need to be burned. Such chips as single chip microcomputer or arm need to be burned. Let's take a look at the specific introduction. View >>

Date：2021-09-10 17:06:00

What is a burner? The burner is a tool that can become a programmer and write data for programmable integrated circuits. The programmer is mainly used for the programming (or brush writing) of chips such as MCU (including embedded) and memory (including BIOS). The programmer mainly modifies the program in the read-only memory. The programmer is usually connected with the computer and used with the programming software. Generally speaking, when it comes to the burner, most people think of CD-RW. Only electronic engineers know that the IC special burner used in factories and R & D units is another electronic product with earlier and more professional development. View >>

Date：2021-09-10 15:05:00

In August, the epidemic spread in several important producing areas of IC industry, resulting in the shutdown of many original factories and the shortage of downstream supply. Wafer foundry launched a new round of price increases, which is also pushing up the market. At the same time, there were many "noises" in the market in August, which may indicate the reversal of the market. It is necessary to take them into account and adjust the expectations of the future market. View >>

Date：2021-09-10 14:52:00

Generally speaking, manufacturers buy all kinds of burnable ICs from semiconductor manufacturers, and their data area is blank. Before assembly, they write the latest version of the control program and data using the IC burner. This is a necessary process more important than IC testing. It is generally implemented by the final electronic product manufacturer, which is also in production, More error prone links requiring more debugging and correction. View >>