What are the three changes in power distribution structure?

This article mainly discusses three aspects of changes in power distribution structures: such as the advent of intermediate bus structures; the emergence of digital control technology; and the new trend of adopting point-of-load power management technology. Each of the above changes can be regarded as a new breakthrough in power distribution technology, allowing the system's service life and performance to be improved to unprecedented levels.

With the rapid development of information system structure, the power distribution structure has also undergone earth-shaking changes. This article mainly discusses the changes in three aspects of power distribution structure, including: intermediate bus structure, digital control technology and the new trend of adopting load point power management technology.

As system design engineers continue to improve the performance and power density of converters, traditional power conversion technology is gradually being replaced by new power distribution structures such as intermediate bus architecture (IBA). The intermediate bus structure is the latest structure that can control multiple different low-voltage power supply trunks in a composite power system. This type of composite power supply system generally uses ASIC, digital signal processor (DSP) and field programmable gate array (FPGA). It is a commonly used power supply system in telecommunications systems, automotive electronic systems and industrial application systems.

Figure 1: Traditional power distribution architecture using isolated multi-output modular DC/DC converters

And each plug-in card has its own converter, but it still cannot meet the increasing requirements.

The IBA architecture uses an isolated bus converter fed from a high-voltage power distribution main and an "intermediate" low-voltage distribution bus with typical voltages between 8V and 14V to multiple non-isolated voltage regulators at the point of load. Feed. Since the IBA structure uses two-stage power conversion, the bus converter and point-of-load regulator must be more efficient and smaller to ensure that they can be installed on a smaller circuit board. Only in this way can the IBA structure Take advantage of its advantages and become a far superior alternative to primary power distribution systems.