Electronics > Projects, Designs, and Technical Stuff
Texas Instruments 3116D (ClassD) amp chip
DW1961:
--- Quote from: rsjsouza on August 19, 2020, 03:25:48 pm ---
--- Quote from: cv007 on August 18, 2020, 06:56:29 am --->In this case, I would assume the relationship between figures 14 and 22 could also be applied to figure 13, that is: at 24V, power at 8 ohms in PBTL would be double when compared to BTL
You are missing the fact that the PBTL graph is using 2 Ohms. All the graphs essentially end up the same (BTL 8,4,PBTL 2), each is just changing the load impedance to increase the power. PBTL is already BTL, its just parallel to share the heat.
--- End quote ---
I am not missing anything. I am just using the output power characterized in Figure 13 (42-ish W for 24V in 8 ohms) and doubling it for PBTL, just like I did when extrapolating figure 14 to PBTL in 4 ohms (which coincidentally matches 2 ohms in PBTL).
Oh well... Take it as it is. I would go with the manufacturer's specs and characterization curves instead of assuming that all is equivalent and equal.
Good luck with your amp, DW1961. Peace out.
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RJ, you do realize that you were replying to cv007, right, and not me? Just wanted to make sure. :)
rsjsouza:
--- Quote from: DW1961 on August 19, 2020, 04:41:38 pm ---RJ, you do realize that you were replying to cv007, right, and not me? Just wanted to make sure. :)
--- End quote ---
You are alright, DW. Everybody is alright, really; sorry for coming in too hard. New job, stupid quarantine and first day of virtual school with my twins takes a toll on one's patience.
I hope the specs are clearer for you. Cheers!
DW1961:
--- Quote from: rsjsouza on August 20, 2020, 12:59:56 am ---
--- Quote from: DW1961 on August 19, 2020, 04:41:38 pm ---RJ, you do realize that you were replying to cv007, right, and not me? Just wanted to make sure. :)
--- End quote ---
You are alright, DW. Everybody is alright, really; sorry for coming in too hard. New job, stupid quarantine and first day of virtual school with my twins takes a toll on one's patience.
I hope the specs are clearer for you. Cheers!
--- End quote ---
It's all good. Yeah, I know now that there is no benefit from running 2 of those with their power supply. It's just all hype. I'd like to see some company do it right and use a 12A power supply to power both those chips to full power, though. Then you could get 50 watts per channel at 8 ohms, and 100 watts per channel at 4 ohms. Now we're talking some serious power.
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