What is a class D amp? Advantages, disadvantages and uses of class D amplifier

Amplifier is one of the devices used to amplify sound and is commonly used in audio systems. In particular, class D amplifier has outstanding advantages over other lines. So let’s refer to the article with lassho.edu.vn to know what class D amp is, its uses, and its characteristics!

What is a class D amp?

What is a class D circuit?

This is a specialized concept so it can be a bit confusing, we can simply understand it as a switching amplifier . Going into the specialty can understand that this is an electronic amplifier that acts as electronic switches but not a linear amplifier.

How class D circuitry works in switching supply rails back and forth, using supply modulation width, pulse density or techniques related to encoding the audio input into a pulse train . The emitted sound will be blocked by high frequency pulses, so the device efficiency is higher than 90% .

What is amp class?

In technical terms, class is the ratio of input and output power of an amplifier, each line will own a different power ratio so users can use it to evaluate the quality of an amp.

If the input and output power is large, the power consumption will be low , if you want to improve the power in the current amp lines, put that number up. However, it will bring the disadvantage that the sound quality will not be good, so calculate carefully to provide perfect sound quality and save power.

What is a class D amp?

Called a PWM (non-linear switching amplifier) amplifier that uses modulation techniques, the circuit is designed to be extremely compact. Thanks to the transistor in the circuit in two open and closed states in a pulse sequence, the class D amplifier has a high operating efficiency of about 80 – 97% , and extremely low power consumption.

The circuit is designed to be very compact thanks to the modulation technique. Small size but large operating amp power, so the phenomenon of loss due to heat loss does not exist. Therefore, it does not need to use aluminum for heat dissipation.

Uses of class D amplifier

There are many types of class D amplifiers on the market today and are very popular with customers when using them. Class D amplifiers are widely used in phones, laptops, mobile applications, tablets, etc. because of their high performance but low power consumption and increased battery life for devices.

Advantages and disadvantages of class DI amp

Advantages :

• Small size and light weight because the class D amp has a compact circuit and does not use a lot of aluminum heatsink.
• High operating efficiency from 80 to 97% .
• Long life because less heat is released.
• The price is cheap about 700,000 VND – 5 million VND.

Cons :

• Perfect sound reproduction is not possible because running the program uses binary 0-1.
• Many people think that the sound comes out rough, not as good as other amps.

Above is the information about Amply class D. Any questions please leave a comment below!