Heatsink for TPA3116D2 HTSSOP package

karthik venkatesh

Intellectual 345 points

Other Parts Discussed in Thread: TPA3116D2

Hi,

We are using TPA3116D2 Class-D for subwoofer (50W, 6 ohms) speaker.

But our PCB size is such that it cannot fit the recommended HEATSINK (ATS-TI 10 OP-521-C1-R1) in datasheet.

Its length is 50MM. Our PCB size is 45MM.

I need to know equivalent but SMALL heatsink (MAX length = 40MM) that fits our design.

TPA3116 is used in PBTL mode, to drive 50W, 6 ohms, 6 inch subwoofer speaker. Our design is as following:

Please LMK ASAP.

Thanks,

Karthik

over 10 years ago

0 Steve Hinshaw over 10 years ago

Intellectual 515 points

I can't comment on the heatsink, but looking at your schematic you can't directly connect the RINN input to ground. It should be AC grounded through the same type capacitor as C20 on your schematic.

0 Roman Wang over 10 years ago

TI__Intellectual 2145 points

the LNP/LNN pins shoud be AC coupled to ground too even if they are not used. As insaid bais is 3V, this may cause the device DC detect and makes it shut down.

0 Steve Hinshaw over 10 years ago in reply to Roman Wang

Intellectual 515 points

It appears that Karthik is using the TPA3116D2 in the PBTL mode thus the INPL and INNL pins should be directly tied to ground as shown on their schematic, page 18 of the datasheet and as the eval board is configured. This reconfigures the output stages for parallel operation.

0 Roman Wang over 10 years ago in reply to Steve Hinshaw

TI__Intellectual 2145 points

Yes, you are right, it's my mistake.

and the main attention is RINN should use cap to ground with SE input.

0 Konstantinos Xenos over 10 years ago

Prodigy 30 points

I'm using the following hardware:

Heatsink: ABL Heatsinks BGA-STD-115 (40mm x 40mm)
Wire: ABL Heatsinks WF-300
Anchor: ABL Heatsinks HOOK-1

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Heatsink for TPA3116D2 HTSSOP package