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Hello, I am using the IRS2452AM in order to make a full-bridge class D amplifier, so I use the BTL mode. However, I don't know what kind of feedback topology is recommended. The IRAUDAMP23 shows how to do a feedback, but the IC is used in half-bridge mode (BTL off, 2 channels). Do you have any solutions ? Thanks in advance.
Solved! Go to Solution.
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Hello @Acherme,
You have to keep the two channels independent and make them a full bridge. The BTL mode has a common mode offset, but using two separate control loops does not have it.
Regards,
Nishanth
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Hello @Acherme,
Thank you for contributing to the Infineon community.
Feedback topology will remain the same for Full bridge BTL mode.
Regards,
Nishanth
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Hello and thanks for your answer Nishanth, unfortunatly it doesn't really help me.
In the case of the IRAUDAMP23 the feedback signals are taken from the nodes 1 and 2, and they are injected in the node 3. But if I am using a full bridge, what must I do with the signals taken from the other bridge (nodes 4 and 5) ? Should inject them directly to the node 3 ? Or should inject the difference of the two bridges feedback signals by using a substractor like shown in this video https://youtu.be/24sBtnnjK34 ? Thanks in advance.
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Hello @Acherme,
You have to keep the two channels independent and make them a full bridge. The BTL mode has a common mode offset, but using two separate control loops does not have it.
Regards,
Nishanth