Differences Between Switching Power Supplies and Linear Power Supplies
In complex multi system businesses, compared to analog power supplies, digital power supplies are implemented through software programming for various applications. Their scalability and reusability enable users to easily change working parameters and optimize power systems. Through real-time overcurrent protection and management, it can also reduce the number of peripheral devices.
Digital power supplies can be controlled by DSP or MCU. Relatively speaking, DSP controlled power supplies use digital filtering methods, which can better meet complex power requirements, have faster real-time response speed, and better power regulation performance than MCU controlled power supplies.
What are the benefits of a digital power supply? Firstly, it is programmable, and all functions such as communication, detection, telemetry, etc. can be implemented through software programming. In addition, digital power supplies have high performance and reliability, and are very flexible.
Interference: In microcontrollers, there is strong interference between the digital and analog parts, as the digital signal is a pulse signal with a wide frequency spectrum; Not only are digital power supplies and analog power supplies generally separated and connected by filters, but in some demanding situations, such as when the AD converter inside some microcontrollers performs AD conversion, the digital part often needs to enter a sleep state, and the vast majority of digital logic stops working to prevent them from interfering with the analog part. If the interference is severe, even two separate power sources can be used, usually isolated by inductance and capacitance You can also connect the digital and analog power supplies on the entire board separately, and use separate paths to directly connect them to the solder joints of the power filter capacitor If the requirements for anti-interference are not high, they can also be easily connected together
(1) If the A/D or D/A function of the chip is not used, it is not necessary to distinguish between digital power supply and analog power supply.
(2) If A/D or D/A is used, reference power supply design should also be considered.
The difference between switch mode power supply and analog power supply
