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Texas Instruments 3116D (ClassD) amp chip

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DW1961:
The amp I have uses the TA 3116D chip, and they manufacturer actually makes one with 2 of those chips, and states twice the power.

Amp: https://www.amazon.com/gp/product/B07NY19148/ref=ask_ql_qh_dp_hza
"If you use a full power supply, it is 200W @ 4 ohm, 150W @ 6 ohm, 100W @ 8 ohm."

TA 3116D spec sheet:

https://www.ti.com/lit/ds/symlink/tpa3116d2.pdf?ts=1596921462063&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPA3116D2

"The TPA31xxD2deviceis a highly efficient Class D audio amplifier with integrated 120m Ohms MOSFET that allows output currents up to 7.5 A. . . Wide Voltage Range:4.5 V to 26 V

So how are they getting 200 watts out of two of these at 4 Ohms with a 24-26V driver? (Max is 26V)

magic:
There aren't too many ways to combine two power amps. Either in parallel or in series (bridged), depending on whether current or voltage is the limiting factor.

mikerj:

--- Quote from: DW1961 on August 09, 2020, 09:21:51 pm ---So how are they getting 200 watts out of two of these at 4 Ohms with a 24-26V driver? (Max is 26V)

--- End quote ---

A combination of paralleling the outputs of two amplifiers to increase drive capability, and by making very optimistic claims (aka lying)

You can't can't bridge the output of these amps as they already a bridged architecture internally.

DW1961:

--- Quote from: mikerj on August 10, 2020, 08:44:09 am ---
--- Quote from: DW1961 on August 09, 2020, 09:21:51 pm ---So how are they getting 200 watts out of two of these at 4 Ohms with a 24-26V driver? (Max is 26V)

--- End quote ---

A combination of paralleling the outputs of two amplifiers to increase drive capability, and by making very optimistic claims (aka lying)

You can't can't bridge the output of these amps as they already a bridged architecture internally.

--- End quote ---

I guess you could use a higher voltage driver and split the voltage across both chips? However, that's not what they are doing. They are using a19V power supply, and they do admit that the 19V power supply will not put out max power specified by the chips. I'm just wondering that using a 19V power supply, even one chip will be lower than the specs state, so how can they power two of them with the same power supply and get more power out of the chips?

lutkeveld:
You can get 100W out these chips if you parallel the outputs (PBTL) but then you need a 2 ohm load.
So probably the spec is not completely false, but its: 2x100W at 2 ohm each.

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