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Class D Switching Power Amplifiers and Power D/A conversion

Class D amp with 300v mosfets
Class D amp with 300v mosfets
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Old 20th January 2018, 12:41 AM   #91
kASD is offline kASD
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Evita check this unfriendly version IRS2452AM, it has got +/-200V capability with symmetric current sensing.

Last edited by kASD; 20th January 2018 at 12:44 AM.
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Old 22nd January 2018, 12:26 PM   #92
Eva is offline Eva  Spain
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- Td-on is 385ns typ. Tdoff is 340ns typ. Slow chip. I got fast with IR2110 and opto.
- The current limiting of both channels is hardwired together regardless of BTL. There is a single CSD line. If ch.1 has a bad load, ch.2 does not produce sound. This is not good for 2ch rack amplifier, unless both channel are BTL.
- I suppose external comparator is tolerated by driving COMP pins with logic signal.
- PWM may not be mandatory, but there is no explanation of PWM mechanism.
- Pricing seems adequate.

In the end this is a magnified LF boombox chip. The high propagation delay prevents good amplifier performance at high frequencies. Imagine Behringer or the Chinese relasing an ultra-long excursion subwoofer with ultra high power amplifier, and using this chip and some 600V IGBTs or 300V FET. And maybe non-isolated PSU with speacial speaker driver.
I use to feel like the small child in The Emperor's New Clothes tale

Last edited by Eva; 22nd January 2018 at 12:29 PM.
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Old 25th May 2018, 01:03 AM   #93
endryc1 is offline endryc1
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Sorry, i can`t see the pictures. Please can you put in other site. Sorry for my english. Thanks a lot.
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