Hi there,
Please let me know if this is a double - searched Chip Amps long and hard but couldn't locate a similar thread so here we go - I bumped into a problem building the 3 channel circuit from page #26 of the TPA3116 datasheet, see attached image. The circuit works as advertised but after say 5 minutes the PBTL chip and output coils become **very** hot, even in idle without input present. The 2ch chip remains cool.
When I change the setup to have both chips run as master (see MASTER/SLAVE mode page 14) by using for B the same values as C and removing the sync connection between both tpa's the pbtl circuit remains cool and performs 100%.
Anyone any clues as to what the cause of this could be ?
Please let me know if this is a double - searched Chip Amps long and hard but couldn't locate a similar thread so here we go - I bumped into a problem building the 3 channel circuit from page #26 of the TPA3116 datasheet, see attached image. The circuit works as advertised but after say 5 minutes the PBTL chip and output coils become **very** hot, even in idle without input present. The 2ch chip remains cool.
When I change the setup to have both chips run as master (see MASTER/SLAVE mode page 14) by using for B the same values as C and removing the sync connection between both tpa's the pbtl circuit remains cool and performs 100%.
Anyone any clues as to what the cause of this could be ?
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Fixed, there's a typo in the tpa3116 datasheet, Sync LPF C41 needs to be 1p, not 1n 
Original TI support topic
MOD : maybe better to move this thread to the class D forum ....
Original TI support topic
MOD : maybe better to move this thread to the class D forum ....
Last edited:
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