High power digital power supply

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Digital power has multiple definitions:

Definition 1: A switching power supply controlled by a digital interface (it emphasizes the "communication" function of the digital power supply).

Definition 2: Switching power supply with digital control function (it emphasizes the "digital control" function of digital power supply).

Definition 3: Switching power supply with digital monitoring function (it emphasizes the "monitoring" function of digital power supply). The common feature of the above three definitions is "modification and upgrading of analog switching power supply", and the emphasis is on "power supply control", and its control object is mainly the external characteristics of the switching power supply.

Definition 4: A power supply product that takes a digital signal processor (DSP) or microcontroller (MCU) as the core, and uses digital power drivers, PWM controllers, etc. as control objects to achieve control, management and monitoring functions. It changes the external characteristics of the switching power supply by setting the internal parameters, and adds "power management" on the basis of "power control". The so-called power management refers to the effective distribution of power to different components of the system to minimize losses. The management of digital power (such as power sequencing) must all use digital technology. Compared with traditional analog power supplies, the main difference of digital power supplies is the control and communication part. In simple and easy-to-use applications with few parameter changes, analog power products have more advantages because their application targeting can be achieved through hardware solidification, while digital power has advantages in complex high-performance system applications with more controllable factors, faster real-time response speed, and the need for multiple analog system power management. In addition, in complex multi-system businesses, compared with analog power supplies, digital power supplies are used in many aspects through software programming. Its scalability and reusability enable users to easily change operating parameters and optimize the power system. 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, which can better meet complex power supply requirements than MCU-controlled power supplies, and have faster real-time response speed and better power supply voltage regulation performance.

Digital power supply features:

1. Intelligent control It is an intelligent switching power supply system with a digital signal processor or microcontroller as the core, and a digital power driver and PWM controller as the control object. The traditional switching power supply controlled by a microcontroller generally only controls the start and shut down of the power supply, and is not a true digital power supply.

2. Optimization of digital and analog component combination The "integrated digital power supply" technology is used to achieve an optimized combination of analog components and digital components in the switching power supply. It can be easily connected to a digital power controller and realize various protection and bias power management.

3. High integration realizes the monolithic integration of the power system, integrating a large number of discrete components into one chip or a group of chips.

4. High control accuracy can give full play to the advantages of digital signal processors and microcontrollers, so that the designed digital power supply can reach high technical indicators. Digital power supply can realize functions such as multi-phase control, nonlinear control, load current sharing and fault prediction.

5. High degree of modularization The digital power supply has a high degree of modularization, and the modules can be easily integrated to form a distributed digital power supply system and improve the reliability of the power supply system.

The key to digital power supply is power management and digital processing of control signals. Its basic requirements are: fastness, stability and accuracy while ensuring stability.

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The main thing is intelligent management, high control accuracy, and modularization.

不亦心

It is generally believed in the industry that there is only one definition of digital power supply, the core is a pure digital loop! Other definitions are usually numerical control or program control.