Hi guys,
I have recently obtained a TDA2030 amplifier module ( https://www.ebay.com/itm/TDA2030A-A...-Amplifier-Board-AMP-6-12V-1-18W/192163691131 ) and am trying to test its performance against the specs. The load is a 4.5 Ohm 20W power resistor, the power supply is a
Basetech 150W (30V, 5A) SMPS, and im using a signal generator (50 Ohm output impedance) to drive it. I'm using an oscilloscope to measure the
RMS voltage across the load, and compute the power as Vl^2 / Rload . The problem is that when I compare my results to the specs it seems that
my module is delivering a significantly lower power than expected. Here is an example measurement:
F: 20 kHz 100 kHz
Vs: 12 V 12 V
Is: 0.27 A 0.29 A
Vl: 2.5 V 2.1 V
Pl: 1.4 W 1 W
In both cases the signal is a clean sine wave, there is no clipping or distortion. According to the specs, the power bandwidth for a 4 Ohm load is 15W up to 100 kHz. For the same load resistance, the datasheet gives the supply voltage required to achieve 15W as 12V. So something is obviously wrong, either with my measurements or with the amplifier module. If someone has an idea what could be going wrong, or any suggestions on narrowing down the source of the error I'd be very happy to hear about it.
cheers,
T
I have recently obtained a TDA2030 amplifier module ( https://www.ebay.com/itm/TDA2030A-A...-Amplifier-Board-AMP-6-12V-1-18W/192163691131 ) and am trying to test its performance against the specs. The load is a 4.5 Ohm 20W power resistor, the power supply is a
Basetech 150W (30V, 5A) SMPS, and im using a signal generator (50 Ohm output impedance) to drive it. I'm using an oscilloscope to measure the
RMS voltage across the load, and compute the power as Vl^2 / Rload . The problem is that when I compare my results to the specs it seems that
my module is delivering a significantly lower power than expected. Here is an example measurement:
F: 20 kHz 100 kHz
Vs: 12 V 12 V
Is: 0.27 A 0.29 A
Vl: 2.5 V 2.1 V
Pl: 1.4 W 1 W
In both cases the signal is a clean sine wave, there is no clipping or distortion. According to the specs, the power bandwidth for a 4 Ohm load is 15W up to 100 kHz. For the same load resistance, the datasheet gives the supply voltage required to achieve 15W as 12V. So something is obviously wrong, either with my measurements or with the amplifier module. If someone has an idea what could be going wrong, or any suggestions on narrowing down the source of the error I'd be very happy to hear about it.
cheers,
T
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