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Teach you simple distinction between analog power supply, switching power supply, digital power

Article Source:Author:Popularity:-发表时间:2013/12/18 8:52:27

Certified power plant design in how we choose power supply module, then select the premise that we have to understand all kinds of power, understand the difference between various power, so we can choose the right power supply modules.

Analog Power Introduction

Analog Power: the power supply transformer, through the core, to achieve a coil, the coil turns ratio determines the voltage at both ends, the role of the core is to pass varying magnetic field, (of) the main winding at 50HZ frequency creates a changing magnetic field, this changing magnetic field passing through the core to the secondary coil, the secondary coil in the induced voltage is generated, so the transformer to achieve a transition voltage.

Disadvantages analog power: coil, the core itself is a conductor, so they will generate heat due to self-inductance current (loss) in the process of transforming the voltage, so very low efficiency of the transformer, normally does not exceed 35%.

Application audio power amplifier transformer equipment: power amplifier transformer needs to provide more power output, so that only by increasing the number of turns, the core volume increased to achieve, turns and increase the volume of the core will increase its loss, so high-power amplifier transformer must be done is very large, this will lead to: bulky, heat.

Switching Power Supply Introduction

Switching Power Supply: Before current into the transformer switching function through the transistor, the current frequency 50HZ we usually raised to tens of thousands of HZ, at such a high frequency magnetic field changes the frequency has reached tens of thousands of HZ, then, can decrease coil turns, the volume of the core to achieve the same voltage conversion ratio, because of the number of turns, reducing the volume of the iron core, loss is greatly reduced, typically up to 90% efficiency of the switching power supply, and the volume can be made very small, and the output is stable, the switching analog power supply has the advantage that is difficult to achieve.

(Switching power supply also has its own shortcomings, such as the output voltage ripple and switching noise, linear power supply is not available)

Audio equipment - switching power amplifier applications: a description of the process of switching power supply has been shown that the advantages of switching power supply, so even high-power amplifier, switching power supply and they can do very fine, small, domestic digital amplifier Shenzhen Cui Pa Adams digital audio equipment company most advanced digital amplifier, they now developed into a pure class T digital amplifier, power amplifier and the next generation S-Class is also in development, the specific see the following information:

Digital Power Introduction

In a simple-to-use, small parameter change request applications, analog power products more competitive because of its specific application can be implemented by hardware cured, but many factors in a controlled, real-time response is faster, need more analog system power management, complex, high-performance system applications, digital power is an advantage. In addition, the complex multi-system business, the relative analog power, digital power is achieved through software programming many applications, it has the scalability and reusability enables users to easily change the operating parameters to optimize power system. Through real-time overcurrent protection and management, it can reduce the number of peripheral devices.

In complex multi-system business, the relative analog power, digital power is achieved through software programming many applications, it has the scalability and reusability enables users to easily change the operating parameters to optimize power system. Through real-time overcurrent protection and management, it can reduce the number of peripheral devices.

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