Unexpected result of IR2110 for the purpose of Class D amplifier

Thread Starter

acacacaca

Joined Nov 1, 2020
9
Sure, I have just attached a capture of the circuit, The LTSpice file can be found in the google drive link shared before
1606297574210.png
 

ericgibbs

Joined Jan 29, 2010
11,564
hi acac,
If I am reading your circuit correctly the Sine source is 1Vppk ref to 0V into a L1016 up at +5V.???
E

Update: Clip
Also Reset is o/c
 

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Alec_t

Joined Sep 17, 2013
11,796
The output of the LT1016 will drive the Hin and Lin pins (which are referenced to 0V) well below their absolute minimum voltage.

Edit:
Here's the revised IR2110g model
 

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Thread Starter

acacacaca

Joined Nov 1, 2020
9
Sorry to reply late, just got something done, I will insert the updated model and simulated again as I have changed the transient source setting for a bit as I just found out the sources is only a sharp triangle,it should be the shape shown as below:
1606392358678.png
1606392441813.png
The first two graph looks at right, but the last one should be also a rectangular wave, isn't it?

I have just got a reminder that I shall remove or add the offset to the circuit to make the input to the IR2110 positive, so I put the resistance on to make it positive, not too sure if this move is correct

I have uploaded the updated model and simulation based on @Alec_t on https://drive.google.com/drive/folders/1b0a7AouonKS8bf_FsdvwORAO3dEk61QT?usp=sharing
 

ericgibbs

Joined Jan 29, 2010
11,564
hi acac,
In order to load some types of files, the TS uses a zip file.
The problem with posting the files elsewhere means that members wanting to help have to go searching.
Also when they are posted on AAC, its a more permanent record.
E
 

Thread Starter

acacacaca

Joined Nov 1, 2020
9
hi acac
Why don't you work on this section of your circuit first.?
What signals do you expect on the output of the comparator pins a and b.?
E
A positive square wave which is able to run the IR2110, there shall be missing one resistance on your graph,
the parallel resistance arrangement for a and b should be the same
 

Thread Starter

acacacaca

Joined Nov 1, 2020
9
A positive square wave which is able to run the IR2110, there shall be missing one resistance on your graph,
the parallel resistance arrangement for a and b should be the same
I have just make a modification about connecting G port of LT1016 to the GND and named the node, which makes it clear, sorry for any inconvenience again as I am not too familiar with this software and it is my first time to use it.
upload_2020-11-26_14-31-8.png
upload_2020-11-26_14-32-53.png
upload_2020-11-26_14-33-10.png
 

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