The "Other" TPA3118 Mono Module
I picked up a pair of the less popular TPA3118 mono boards. I think these used to be several dollars more apiece at one time and not as abundant, but they are now only .50 or so more expensive and lots of sellers.
First off, as can be seen, board is somewhat larger (4x5.5 vs 3.5x4.5 cm). PCB thickness is a bit heavier at 1.5mm vs. 1.2mm. Capacitors are higher capacity and voltage 470uF/35v (ChongX) vs. 330uF/25v and are through hole vs. SMD, though not necessarily easier to deal with, as the pads can’t take much heat. SMD devices are all larger, indicating higher voltage rating for these capacitors and resistors. Inductor is 33uH vs. 10uH. Note also that inductors are much heavier construction, potted, and landing pads on the pcb are also larger, so more suitable for replacement inductors, if one wishes. The smaller pcb requires some finagling to fit replacement inductors.
Input capacitance on the board (C18/C19) is 1uF and gain is set at 36dB. Input capacitance is 3.3uF on the smaller board. The 1uF value results in a 3dB drop at 20Hz, 10uF would be needed here to keep things flat down to 20Hz, this per the datasheet.
One of the caps looks oversized, one broke off in shipping and that one is a replacement.
The larger board already comes with its terminals installed and their location, with the input and output terminals opposite the power terminal, seems like a better layout.
I will hook these up at some point and decide for myself it they sound as good as the other.
I picked up a pair of the less popular TPA3118 mono boards. I think these used to be several dollars more apiece at one time and not as abundant, but they are now only .50 or so more expensive and lots of sellers.
First off, as can be seen, board is somewhat larger (4x5.5 vs 3.5x4.5 cm). PCB thickness is a bit heavier at 1.5mm vs. 1.2mm. Capacitors are higher capacity and voltage 470uF/35v (ChongX) vs. 330uF/25v and are through hole vs. SMD, though not necessarily easier to deal with, as the pads can’t take much heat. SMD devices are all larger, indicating higher voltage rating for these capacitors and resistors. Inductor is 33uH vs. 10uH. Note also that inductors are much heavier construction, potted, and landing pads on the pcb are also larger, so more suitable for replacement inductors, if one wishes. The smaller pcb requires some finagling to fit replacement inductors.
Input capacitance on the board (C18/C19) is 1uF and gain is set at 36dB. Input capacitance is 3.3uF on the smaller board. The 1uF value results in a 3dB drop at 20Hz, 10uF would be needed here to keep things flat down to 20Hz, this per the datasheet.
One of the caps looks oversized, one broke off in shipping and that one is a replacement.
The larger board already comes with its terminals installed and their location, with the input and output terminals opposite the power terminal, seems like a better layout.
I will hook these up at some point and decide for myself it they sound as good as the other.
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Any link for this larger board, please.
here it comes my friend
perfk TPA3118 PBTL Digital 60W Audioverstarker: Amazon.de: Elektronik
about 4,21 euros......
chris
I got them from this vendor for $2.78 each. Came from China, took two weeks to the US.
60W TPA3118 Digital Amplifier Board AMP DC 10-24V Module PBTL MonoS* | eBay
60W TPA3118 Digital Amplifier Board AMP DC 10-24V Module PBTL MonoS* | eBay
Hi , I would like to ask if anybody has some experience with this 2.1 tpa3118 board. It sounds quite good but it has really annoying background noise , which strangely decreases when You turn the volume knoob down . Does anybody have a fix for it ?
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Problem with TPA3118
I have several modules with TPA3118. In testing, I found out at several pieces of modules output limit, ie the loudspeaker is disconected at high output power. After some seconds the amplifier returns into normal state. Does anyone have experience with this problem?
1PCS DC 12V 24V TPA3118 60W Mono Digital Audio Power Amplifier Board Amp Module-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
I have several modules with TPA3118. In testing, I found out at several pieces of modules output limit, ie the loudspeaker is disconected at high output power. After some seconds the amplifier returns into normal state. Does anyone have experience with this problem?
1PCS DC 12V 24V TPA3118 60W Mono Digital Audio Power Amplifier Board Amp Module-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
These chokes (coils) can probably handle 3A (peak) then they start saturating. When they saturate, their impedance becomes almost like short-circuits and the amplifier output lines look straight into the output filter capacitances. For audio frequencies, that is less severe but for the 400KHz carrier frequency it is like looking into a short-circuit. Then the amplifier limiter circuits cutt-off the amplifier.
Solution: bigger output filter chokes.
Solution: bigger output filter chokes.
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