Class D Audio Amplifier IC Forum Discussions
Dear Developer team / community,
I'm looking for a diagram of the Class D amplifier as the attached photo, is it possible?
Thanks so much!
HI, Do you have Piezo driver devices for buzzer or speaker?
Or, Can you make solutions of Class-D amps for Piezo ?
Best Regards, BANEShow Less
I'm using the EVAL_AUDIO_MA2304DNS at 192kHz fs. Currently I have 2 channels that each have 2 biquads configured to be filters. In total I'm using 4 of the available 8 biquads, I'm not using the delay or volume control. It would be super useful for my application if I could somehow reconfigure the 4 bypassed biquads that I'm not using to get 2 more channels out of the serial audio transmitter. I have a crossover filter set up for 1 sub and 1 main but the end goal is to create a cross over filter for 2 subs and 2 mains. I have enough blocks to implement what I want but I can't move them into the right positions.
Is this reconfiguration possible? I would like to have 4 channels at 192kHz transmit I2S out of the serial audio transmit port each channel with 2 biquads to create a 4th order Linkwitz-Riley crossover filter across the 4 channels. Do I just need to use 2 MA2304DNS's? or buy a different chip?Show Less
I have an EVAL_AUDIO_MA2304DNS, it's connected to the GUI and I'm trying to apply a cross over filter to an incoming signal with the integrated DSP. I then want to use the I2S pins on the board to read the digital serial data of the processed signal out. This works when I have an fs of 96k or 48k but when I bump up to 192k the board is super unreliable. on an O-scope I see the Word clock length is unstable and constantly changing size. I'm getting a red PLL error, the I2S input is flashing green and red, and both speakers have a yellow clip warning.
What could be the cause of this problem? is the EVAL board able to do 192k? do I need a new/different board to be able to get 192k? Is there a register setting that I don't know about?Show Less
I have a question regarding MA2304 and power supply.
According to user manual (v 1.1) pin no. 40 can be connected to PVDD or VDD (J_VDD). If we look into datasheet (INTV2.1.9) maximum voltage is 5V5.
- If pin no. 40 can be connected to PVDD, can we keep VDD_IO voltage without PVDD?
- If pin no. 40 can not be connected to PVDD, can we keep VDD and VDD_IO voltages without PVDD?
we are aiming to develop a class D amplifier 2CH and 4 CH .
Our present design is based on IRS2092, for 500w system
new amp is target to deliver
2x 4800W @2Ohm stereo
2x 3200W @4Ohm stereo
2x 1800W @8Ohm stereo
1x 6400W @8Ohm bridge Mono
1x 9600W @4Ohm bridge Mono
can u pl suggest the design/IC/Mosfet
Can any Class-D chip be used as a power supply?
The idea is to use the same topology as a Class D amplifier, but the following specs:
- AC constant-voltage power source (ie, an "Inverter")
- input: 12V to 24V DC
- output: unipolar 100 kHz sinusoid
- 0V to 5V RMS
- Inductive load (coupled inductor at each node)
- 0A to 5A continuous per inductive node
- up to four nodes
- up to 125W continuous
- some way to regulate voltage
So, the "audio" input would be a 100 kHz sine wave. That's obviously a different frequency range than audio, so i assume i'd have to use discreet mosfets.
Perhaps, since i only need a unipolar output, i could use just one mosfet?
I assume to regulate output voltage, i would change the amplitude of the input sine.Show Less
this is regarding the IRS 2452 chip, used to make constant voltage distribution system, IRAUDAMP 23 is reference design for
- 500 W x 2 channels (1% THD+N, 100 Vrms or 70 Vrms)
can this be converted into Bridge mode to make 1000W x 1 channel
Dear Infineon community,
I get a pop noise every time I mute or unmute the amp, even when I keep the amp enabled, I2S clock continuously on and with digital zero input data. The same behavior is observed with my custom board, but also with the original eval board EVAL_AUDIO_MA12070P from Infineon on SE and BTL outputs when I flip the mute switch.
I found that Infineon specifies an output offset voltage of +/-200mV for the old silicon revision (before Feb 2022). The new silicon revision is specified with lower values (+/-35mV for BTL and +/-50mV for SE outputs), but I have >500 pcs of the old revision on stock and would like to use them for the first batch of my product.
My questions are:
1. Is the audible pop noise caused by the 200mV offset or is there any other reason for it?
2. Can you recommend a workaround or proper solution to mute/unmute the amplifier without noise?
Thank you very much!
I have two MA12070 chinese boards and neither of them sounds when I connect them no matter how they don't sound, I realized that the enable PIN was set to High and the Mute PIN was pulled Low so the boards are always muted, if a cross a cable between this PINs I can get sound, can anyone help me solving this?