Under certain power conditions, the smaller the volume, the better. In the process of packaging, shrinking the volume means expanding the space, so as to provide more space for other parts of the system and ensure the integrity of the function. Under certain power conditions, the smaller the volume, the better. In the process of packaging, shrinking the volume means expanding the space, so as to provide more space for other parts of the system and ensure the integrity of the function. The following small series briefly introduces the benefits of using DC-DC power supply modules
With the continuous progress of society, electronic equipment plays an increasingly important role in various fields such as industrial production, transportation, and communication. Although the cost of power modules in electronic equipment is very low, it can be called electronic equipment. In the "heart", the failure of the power module may directly lead to the paralysis of electronic equipment.
1. Light load application
Generally, the DC-DC module power supply has a load constraint, which varies from manufacturer to manufacturer. It is generally about 10%. When the load is too light, the energy storage element will have difficulty in freewheeling, and the current will be discontinuous. Then the output voltage will be unstable. Determined by its own operating principle. But what if the user does have a light load or no-load operation? The convenient and useful method is to add a certain dummy load, about 2% of the output power, which can be preset by the module manufacturer before leaving the factory, or by the user. Appropriate resistance of the equipment outside the module as a load. It is worth noting that assuming the former is selected, the module power will be reduced, but some circuit topologies have no load constraints.
Second, reasonable design reduces mechanical stress
The lead-out methods of the DC-DC power module include terminals, aviation plugs, wire throwing, metal pins, etc. The internal circuit of the module power supply, the module power supply and the metal pins are all connected by welding methods. In some special occasions, the intensity of mechanical vibration is relatively large, especially when a radiator is added to the power supply of the high-power module, which is more serious. Although the thermal conductive insulating rubber is generally potted inside the module power supply, it can provide a good buffer protection for the components, but the solder joints may not be able to withstand the severe vibration stress and crack, resulting in the failure of the power supply operation of the module. At this time, it is necessary to base on the welding Then use other fixing and buffering methods. For example, you can use fixtures or bolts (about the screw hole module) to fix the module to the chassis, large circuit board and other components with relatively good vibration resistance, and put some elastic materials in their centers. Cushioning stress