Class AB amplifier chip

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Friends, besides TI, ADI, and ST, who else makes Class AB amplifier chips?

maychang

[Besides TI, ADI, ST and other manufacturers, who else can make Class AB amplifier chips? 】

There are also National Semiconductor (NS), ON, Burr Brown, etc.

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maychang posted on 2024-2-20 18:33 [Besides TI, ADI, ST and other manufacturers, who else also makes Class AB amplifier chips? ] There are also National Semiconductor (NS), ON, Burr Brown, etc...

I have looked for ON, but can't find it. I remember seeing ST's before. Now I look for it under Class AB. The datasheet shows it is a DMOS audio power amplifier. It doesn't look like Class AB. I will look for NS and BB tomorrow. Isn't BB TI?

maychang

Alas, published on 2024-2-20 18:41 I have looked for it on ON, but it is not there. I remember seeing ST's before. Now I look for it under AB class. I see in the datasheet that it is a DMOS audio power amplifier. It does not look like AB...

【Isn’t BB TI?】

BB is not TI. However, maybe BB has been acquired by a company now.

maychang

What are you searching for Class AB amplifier chips for? What output power do you need?

maychang

Woohoo! Posted on 2024-2-20 18:41 ON I have looked for it, but it is not there. I remember seeing ST's before. Now I look for it under Class AB. I see in the datasheet that it is a DMOS audio power amplifier. It does not look like Class AB...

After some research, I found out that Burr Brown was founded in 1956 and was acquired by Texas Instruments in 2000, becoming a division of Texas Instruments specializing in the production of high-performance analog chips.

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maychang posted on 2024-2-20 18:50 What are you searching for Class AB amplifier chips for? What output power do you need?

I want to amplify a 2Khz sinusoidal signal, with an effective value of about 24V and an actual output power of about 70W. For this purpose, there are two methods, one is a class AB amplifier and the other is a power amplifier. A single chip is definitely not enough, so a triode is added to expand the current.

maychang

Alas, published on 2024-2-20 20:55 I want to amplify a sine signal of about 2Khz, with an effective value of about 24V and an actual output power of about 70W. For this purpose, there are two methods, one is AB ...

[For this purpose, there are two methods, one is the class AB amplifier and the other is the power amplifier. ]

Class AB amplifier is a type of power amplifier.

xutong

maychang posted on 2024-2-20 18:47 [Isn’t BB TI?] BB is not TI. However, maybe BB has been acquired by a company now.

BB has been acquired by TI for quite a while

maychang

Alas, published on 2024-2-20 20:55 I want to amplify a sine signal of about 2Khz, with an effective value of about 24V and an actual output power of about 70W. For this purpose, there are two methods, one is AB ...

[A single chip is definitely not enough, so add a transistor to expand the current. ]

With a sine wave output of about 70W, there is no need to add a transistor to expand the current, right? There is a single chip with a 70W output.

maychang

Alas, published on 2024-2-20 20:55 I want to amplify a sine signal of about 2Khz, with an effective value of about 24V and an actual output power of about 70W. For this purpose, there are two methods, one is AB ...

[A single chip is definitely not enough, add a transistor to expand the current]

If a Class D amplifier chip is used, there is definitely no need to add transistors to expand the current for a 70W output.

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maychang posted on 2024-2-20 21:13 [A single chip is definitely not enough, add a transistor to expand the current. ] For a sine wave output of about 70W, there is no need to add a transistor to expand the current, right? There are already 70W output...

This package actually has poor heat dissipation. There is no heat sink, just a plastic shell. The price is like a roller coaster, sometimes high and sometimes low, sometimes it is more than 200 yuan. It is used on a circuit and I have wanted to replace it but have never changed it.

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maychang posted on 2024-2-20 21:17 [A single chip is definitely not enough, add a triode to expand the current] If a class D amplifier chip is used, there is definitely no need to add a triode to expand the current for a 70W output.

The Class D amplifier seems to be unusable. I tested this when I bought a Class D amplifier module and it was very noisy.

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maychang posted on 2024-2-20 21:09 [For this purpose, there are two methods, one is class AB amplifier and the other is power amplifier. ] Class AB amplifier is a type of power amplifier.

Moderator, I saw in TI's classification that the power amplifier is not listed with the speaker amplifier. I always thought they were different. I will find a power amplifier model and compare it with the LM3886 parameters to see which one is more suitable.

chunyang

It is hard to find high-power Class AB amplifier chips in production now. If it is not a mass-produced product, you can consider old models, which are very common. But why do you have to compete with Class AB amplifiers? Now is the era of Class D amplifiers. It is not difficult to find chips that are much more powerful than you require, and they are much more efficient, so you don’t need to worry too much about heat dissipation.