Technical points for purchasing DC DC and AC DC power modules

Technical points for purchasing ACDC and DCDC power modules

Power modules play an increasingly important role in the modern integrated electronic technology industry. Many electronic designers must first understand the characteristics of the products, whether they are repeating the purchase of power module products for the first time. When they consult some manufacturers of power modules, they often ask some common questions to clearly understand whether the product can meet their needs. We are observing and arranging some customer consultation records of Aipu Electronics, so as to briefly summarize the points that should be paid attention to when consulting the module power supply products, in order to help you get the answer accurately and quickly.

1, the power module is used more, basically concentrated in the DC-DC and AC-DC two series of modules. So the first is to know the voltage conversion method of the product you want, and to clearly express whether you want an ACDC power module or a DCDC power module.

2. Tell the technician to use the voltage conversion value of the module. For example, DCDC, such as 24V to 12V. If it is ACDC, for example, it is 220V to 12V. This depends on your actual situation. Also pay attention to the input voltage range value, whether it is wide voltage or narrow voltage. The output voltage should also be noted whether it is a regulated output or an unregulated output.

3. Identify how many watts you want to achieve. Because power products generally calculate the ex-factory price by power, the higher the power, the higher the price. Therefore, in order to save costs, it is generally not recommended to purchase excessive power, and the higher the power, the higher the heat is generally, which will affect the temperature of the product. But at the same time, we must also satisfy the stable work of our products, so we must understand the actual use power of our products.

4. The function to be achieved by the power module. In addition to the general voltage conversion, the power module has some corresponding functions. Features such as isolation, filtering, and short-circuit protection also directly affect the stability of your product's actual application.

5, size. One of the advantages of the power module is that it has a smaller size than the ordinary switching power supply, and can be directly installed in the PCB board, which solves the problem of volume and integrates with the product. Understand the volume of the module power supply when the function is satisfied.

6, the temperature requirements of the product and the use of the environment. Power modules are generally classified into industrial and military. The biggest difference between the power module's grade industrial power module and the military module is the working temperature. The operating temperature is divided into the ambient temperature and the component temperature. In terms of component temperature, the industry consensus is only up to 125 degrees Celsius; The more reasonable temperature should be -40 to +85 degrees Celsius.

Common grade temperature division of power modules:

Military grade: -55 ° C ~ 105 ° C

International industrial grade operating temperature is generally -40 ° C - 85 ° C

Industrial grade (domestic dominated) working temperature -20 ° C-55 ° C

Civil (commercial) grade (low-end market, IC dominates) operating temperature -0 ° C -55 ° C

Consumer grade (low-end market, IC dominates) operating temperature 0 °C-55 °C

Also pay attention to the environment in which the power module is used, such as temperature, dust, vibration, humidity, etc.

7, other key points of the power module: quality, brand, delivery, service and after-sales.

We buy power module products because it is an electronic component that is related to the stability of electronic products. So be sure to choose a regular company's products. ac dc power module