Problems that should be paid attention to when designing reliable guanjian5(3)


Module power

The secondary power DC/DC converter of the communication power supply has been commercialized. The module adopts high-frequency PWM technology, the switching frequency is about 500kHz, and the power density is 5W~20W/in3. With the development of large-scale integrated circuits, the module power supply is required to be miniaturized, so it is necessary to continuously increase the switching frequency and adopt new circuit topologies. The power density of the module power supply has been greatly improved.

There are many manufacturing industries in which power modules are used, and the requirements of the natural environment are different. Because of its universal design, DC-DC power modules can only consider the general requirements. Therefore, when customers' application scenarios are demanding, it is necessary to add appropriate peripheral power circuits to improve the stability of the 24V input power supply.

4. Heat dissipation design

About 15% of the destruction of industrial power modules is caused by poor heat dissipation of heat pipes. The power modules are moving towards miniaturization and integration. However, the 24V input power supply in many application places is constantly operating in a closed environment. If the accumulated heat cannot be dissipated, the components inside the 24V input power supply will be destroyed due to exceeding the thermal stress.