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Class D Switching Power Amplifiers and Power D/A conversion

25W TDA7492 and 50W TDA7492 ???
25W TDA7492 and 50W TDA7492 ???
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Old 17th March 2013, 01:08 PM   #1
Wieslaw Lipowsk is offline Wieslaw Lipowsk  Poland
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25W TDA7492 and 50W TDA7492 ???
Default 25W TDA7492 and 50W TDA7492 ???

Hi,
What's the difference between the 50W and 25 W versions of the TDA 7492 amps?

I am looking at both their photos carefully but I fail to find any. Perhaps it's just a matter of the power supply and/or input and output filter parts and the chips themselves?

I'd like to try both feeding my loudspeakers, a 25W feeding the mid-treble, and a 50W feeding the woofers.

Regards, WL
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Old 17th March 2013, 01:30 PM   #2
Saturnus is offline Saturnus  Denmark
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The difference between TDA7492 and TDA7492P lies in the in the overcurrent threshold which is 6A and 4.2A respectively. The lower current threshold of TDA7492P dictates a higher typical load impedance of 8 ohm compared to the 6 ohm of the TDA7492.

The difference is dictated by a lower maximum operating temperature probably due to the TDA7492P being produced using a cheaper technique or cheaper materials in the construction or both.

Last edited by Saturnus; 17th March 2013 at 01:49 PM.
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Old 17th March 2013, 07:27 PM   #3
Wieslaw Lipowsk is offline Wieslaw Lipowsk  Poland
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25W TDA7492 and 50W TDA7492 ???
Both Parts Express's versions are called just TDA7492. Also, Sure fail to name them 7492 or 7492P. Perhaps one has to pull the heatsinks to see the proper brand number?
Regards,
WL
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Old 1st January 2016, 12:49 PM   #4
roopes is offline roopes  Sweden
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If im going to use a DC supply from the outlet to power the TDA7492P (TDA7492P 50W 50W Wireless Bluetooth 4 0 Audio Receiver Digital Amplifier Board | eBay)

What is the optimal current and voltage it should have?
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Old 8th March 2017, 08:06 AM   #5
trunkline is offline trunkline  Spain
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Acording all aliexpress stores the maxim votage for 4 ohms speaker is 18V.
Its really dangerous if I use the TPA7492 board and 4 ohms speaker with a 19V laptop DC adapter?

I d'ont need the 50W of this module.
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