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-   -   About TA2022 design designers LJM (https://www.diyaudio.com/forums/class-d/191743-ta2022-design-designers-ljm.html)

ljm_ljm 29th June 2011 04:18 PM

About TA2022 design designers LJM
 
1 Attachment(s)
I think a lot of people in this section have been in touch to TA2022 the IC.

It has real power and the family to use appropriate distortion. And it's very cheap.

But the chip is not easy to design. The group of linear regulator is excellent design scheme of the necessary.

Because of its impedance is not high, about 20 K ohms, so large input capacitance is also useful

I used the 3.3 UF MKP.

The necessary dc protection circuit and cut off the flow of TA2022 itself with protection. Can be a very good protection dc and short circuit.

ljm_ljm 29th June 2011 04:19 PM

It can work in very good +-within 35 V. Far more than similar IC inter-class D.

And can be very good drive 4's speakers. At this time of power will reach 120 watts.

It is less than the distortion of the TDA8920, TA2020 TA2024

cityfeng 3rd July 2011 07:33 AM

Do You have schematic, can you send to me please! cityfeng29@sina.com, thanks!

ljm_ljm 7th July 2011 03:03 PM

Quote:

Originally Posted by cityfeng (https://www.diyaudio.com/forums/class-d/191743-ta2022-design-designers-ljm-post2626966.html#post2626966)
Do You have schematic, can you send to me please! cityfeng29@sina.com, thanks!


WHERE FROM YOU

Brusque 26th October 2011 01:32 PM

Hello LJM!

I made some tests using that board (that you've sent the picture).

I was very impressed. Testing it on the bench, without a heatsink, at about 40W@8R per channel, it started to lower it's gain after some time then it stabilized at about 10W per channel.

I also used it on a gig (I'm a guitar player) without heatsink, for about 4 hours without problem. My volume was fairly loud and I didn't noticed the output power reduction.

The protection schemes are great. The chip seens to be almost indestructible.

Regarding the audio quality, I've made no extensive tests but noticed nothing abnormal.

I'm an electronics R&D guy and would like to colaborate with you if you intend to work with this chip.

Best regards!

Brusque

theAnonymous1 26th October 2011 02:15 PM

Quote:

Originally Posted by Brusque (https://www.diyaudio.com/forums/class-d/191743-ta2022-design-designers-ljm-post2759188.html#post2759188)
The chip seens to be almost indestructible.

Haha, untill it dies. The TA2022 is certainly not indestructable. I've had about three of them die on me in different situations over the last 6 years.

And why would you intentionally use it without some form of heatsink?

Brusque 26th October 2011 02:45 PM

Hello theAnonymous1;

> And why would you intentionally use it without some form of heatsink?

Stress test.

Regards!

ljm_ljm 31st October 2011 02:01 AM

Quote:

Originally Posted by Brusque (https://www.diyaudio.com/forums/class-d/191743-ta2022-design-designers-ljm-post2759188.html#post2759188)
Hello LJM!

I made some tests using that board (that you've sent the picture).

I was very impressed. Testing it on the bench, without a heatsink, at about 40W@8R per channel, it started to lower it's gain after some time then it stabilized at about 10W per channel.

I also used it on a gig (I'm a guitar player) without heatsink, for about 4 hours without problem. My volume was fairly loud and I didn't noticed the output power reduction.

The protection schemes are great. The chip seens to be almost indestructible.

Regarding the audio quality, I've made no extensive tests but noticed nothing abnormal.

I'm an electronics R&D guy and would like to colaborate with you if you intend to work with this chip.

Best regards!

Brusque


welcome to your opinion. Subsequent version I slightly revised the point.

This version is V1.3, it USES the LM7810 as IC power source,

And a resistor instead of 1 N4741 off. Its compatibility is better.

Is willing to provide all the necessary things. If you need anything.

ljm_ljm 13th November 2011 10:28 AM

1 Attachment(s)
I suggest using the preamp collocation.

This can improve a lot of sound.

activexp 22nd December 2011 12:40 PM

Hi ljm_ljm,

I have recently received the TA2022 kit from Zoe_Tsang and the board is marked V1.1 with 2 resistors and 1 diode already soldered to the board.

One of the resistors replaces diode 12U but IC power source is LM7805, not LM7810.

Do I need LM7810 for the board to work correctly?

Regards,
Steve


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